Parthenogenesis

Guides

• Aaroniella

  loving barklice

  Aaroniella is a genus of barklice in the family Philotarsidae, commonly referred to as 'loving barklice.' The genus contains more than 40 described species and was established by Mockford in 1951. Species within this genus show variation in reproductive strategies, including documented parthenogenesis in at least one species.

  barklicePhilotarsidaeparthenogenesisPsocodea

• Aclerda

  flat grass scales

  Aclerda is a genus of scale insects (family Aclerdidae) commonly known as flat grass scales. Species in this genus are legless as adults, with strongly reduced 1-segmented antennae and a unique anal apparatus. They inhabit leaf sheaths of grasses in hot, dry regions. The genus includes both sexually and parthenogenetically reproducing species, with unusual cytogenetic systems including heterochromatinization of one haploid chromosome set in males of some species.

  scale-insectsgrass-pestssugarcane-pestovoviviparityparthenogenesiscytogeneticsAclerdidaeHemiptera

• Acropsopilio

  harvestman

  A genus of tiny harvestmen (Opiliones: Acropsopilionidae) established by Silvestri in 1904. The genus includes several species, with *Acropsopilio neozealandiae* being endemic to New Zealand where extensive collecting has yielded only female specimens, suggesting possible parthenogenetic reproduction. Members are found in forest habitats and are among the smallest harvestmen.

  harvestmanOpilionesNew-Zealand-endemicparthenogenesisforest-faunaleaf-litterAcropsopilionidae

• Acyrthosiphon pisum

  Pea aphid, green dolphin, pea louse, clover louse

  Acyrthosiphon pisum, the pea aphid, is a sap-sucking hemipteran and major agricultural pest of legume crops worldwide. It is notable as the first hemimetabolous insect with a fully sequenced genome and serves as a model organism for studying aphid biology, endosymbiosis, polyphenism, and asexual reproduction. The species exhibits complex polyphenism with multiple morphs including winged and wingless parthenogenetic females, sexual males and females, and green or red/pink color morphs. Its survival depends entirely on the obligate endosymbiont Buchnera aphidicola, which provides essential amino acids lacking in its phloem sap diet.

  aphidpestmodel-organismendosymbiosisparthenogenesispolyphenismlegume-pestvirus-vectoragricultural-pestBuchneracarotenoid-synthesishemipterasternorrhyncha

• Adelges

  Adelges is a genus of conifer-feeding insects in the family Adelgidae, closely related to aphids. Members of this genus are small, sap-sucking insects that infest various fir (Abies) and hemlock (Tsuga) species. Several species are significant forest pests, notably Adelges tsugae (hemlock woolly adelgid), which has caused extensive mortality of eastern hemlock forests in North America, and Adelges piceae (balsam woolly adelgid), a pest of balsam and Fraser firs. The genus exhibits complex life cycles often involving parthenogenetic reproduction and alternating generations between winged and wingless forms.

  conifer-pestinvasive-speciesforest-entomologyparthenogenesisphloem-feederwax-secretion

• Adelges laricis

  Larch Woolly Aphid

  Adelges laricis is a holocyclic adelgid with a complex life cycle involving two host genera: Picea (spruce) as primary host where galls form, and Larix (larch) as secondary host. The species exhibits extensive morphological polymorphism across five generations (Fundatrix, Migrans alata, Hiemosistens, Sexupara, Sexualis). First-instar nymphs are the only mobile stage; subsequent instars remain sessile with stylets permanently inserted. The species is a significant forest pest causing reduced tree vigor, needle damage, and mortality under chronic infestation.

  adelgidlarch-pestparthenogenesishost-alternationforest-entomologyinvasive-potentialgall-formerwoolly-aphidEPG-studymorph-determination

• Adelges tsugae

  Hemlock Woolly Adelgid, HWA

  Adelges tsugae, the hemlock woolly adelgid, is a small invasive sap-sucking insect native to East Asia. In eastern North America, it is a destructive pest of eastern hemlock (Tsuga canadensis) and Carolina hemlock (Tsuga caroliniana), causing extensive tree mortality and threatening forest ecosystems. The insect is named for the white, woolly wax coating that covers its egg sacs and protects the insects beneath. It reproduces asexually via parthenogenesis in North America, producing two generations per year.

  invasive-speciesforest-pestbiological-controlclimate-changeparthenogenesishemlock-conservationsap-feeding-insect

• Adelgidae

  adelgids, woolly conifer aphids, pine aphids, spruce aphids

  Adelgidae is a small family of sap-sucking insects in the order Hemiptera, closely related to aphids. Members are commonly known as "woolly conifer aphids" due to their waxy secretions and exclusive association with conifer hosts in the family Pinaceae. The family includes some of the most destructive invasive forest pests in North America, notably the hemlock woolly adelgid (*Adelges tsugae*) and balsam woolly adelgid (*A. piceae*), which have caused widespread tree mortality. Adelgids exhibit complex, multigeneration life cycles that may include cyclical parthenogenesis, host alternation, and polymorphism.

  HemipteraSternorrhynchaAphidoideaconifer-pestsinvasive-speciesforest-entomologyparthenogenesishost-alternationbiological-controlgall-formation

• Allocyclosa

  trashline orb weaver

  Allocyclosa is a monotypic genus of orb-weaver spiders in the family Araneidae, containing only Allocyclosa bifurca. Originally described as Cyrtophora bifurca in 1887, it was transferred to its own genus in 1999 based on distinctive morphological features. The genus is notable for being the only Cyclosa-like species north of Mexico with a forked abdominal tip, and for its unusual reproductive biology where males are exceptionally rare.

  orb-weavertrashlinecamouflageparthenogenesisparasitoid-manipulationcryptic-colorationweb-decorationmonotypic-genus

• Allocyclosa bifurca

  Bifurcate Trashline Orbweaver, Forked-tail Trashline Orbweaver

  Allocyclosa bifurca is a small orb-weaving spider and the sole species in its genus. Adult females measure 5.1–8.5 mm in body length and are silvery or white in color. The species is distinguished by a forked (bifurcate) projection at the rear of the abdomen—two humps shaped like the letter 'M'—giving it the Latin name meaning 'two-forked.' This is the only Cyclosa-like species north of Mexico with this forked tail structure. The spider exhibits remarkable camouflage behavior, arranging debris and egg sacs in a vertical line through its web to masquerade as bird droppings. Unusually, males are rarely observed, and females possess vestigial external genitalia with no external opening, suggesting possible parthenogenic reproduction. The species is also notable as a host for parasitic wasps that chemically manipulate its web-building behavior.

  spiderorb-weavertrashline-orb-weavercamouflageparthenogenesisbehavioral-manipulationparasitoid-waspecdysonecactus-habitatsouthern-North-AmericaCaribbeanCentral-America

• Alloxysta

  Alloxysta is a genus of small parasitic wasps in the family Figitidae, subfamily Charipinae. The genus was described by Arnold Förster in 1869 and contains over 100 species with cosmopolitan distribution. Members are aphid hyperparasitoids, attacking primary parasitoids (aphidiid wasps) that develop within aphids. Some species exhibit thelytokous parthenogenesis induced by Wolbachia endosymbionts, where unmated females produce female offspring without mating.

  hyperparasitoidaphid-parasitoidWolbachiaparthenogenesisbiological-controlCharipinaecynipoidagricultural-pest-management

• Alsophila pometaria

  Fall Cankerworm Moth, Fall Cankerworm, Inchworm

  Alsophila pometaria, the fall cankerworm, is a native North American geometrid moth notable for its sexually dimorphic adults: males are winged and capable of flight, while females are wingless, flightless, and lack functional mouthparts. The species exhibits a distinctive life cycle with adult emergence in late autumn and early winter, egg-laying on tree bark, and larval feeding in spring. Caterpillars are known as "inchworms" or "loopers" due to their characteristic looping locomotion. The species is a generalist defoliator of deciduous hardwood trees and can reach outbreak densities, causing significant economic and ecological impact.

  geometridaegeometer-mothinchwormlooperdefoliatorforest-pestsexual-dimorphismflightless-femalewinter-mothparthenogenesisnative-pesthardwood-foresturban-forestryintegrated-pest-management

• Amblyomma dissimile

  Iguana Tick

  Amblyomma dissimile is a hard tick (Ixodidae) with an exceptionally broad host range spanning amphibians, reptiles, mammals, and birds across the Neotropics. It is commonly known as the Iguana Tick due to frequent associations with iguanid lizards. The species exhibits a three-host life cycle and has been documented to reproduce parthenogenetically. Its distribution extends from the southern United States through Central America and South America to northern Argentina, with highest environmental suitability in the Amazon and Pantanal biomes.

  tickixodidaeectoparasitereptile-parasiteamphibian-parasiteparthenogenesisvectorneotropicaliguana-tickthree-host-tick

• Amynothrips andersoni

  Alligatorweed Thrips, Alligator Weed Thrips

  Amynothrips andersoni is a species of thrips in the family Phlaeothripidae, native to South America and introduced to the United States as a biological control agent against the invasive aquatic weed alligator weed (Alternanthera philoxeroides). Adults are small, shiny black insects approximately 2 mm in length. The species exhibits wing dimorphism, with both short-winged and long-winged flying forms present, though the latter is rare. Both larval and adult stages feed on alligator weed, causing leaf curling and plant stunting.

  biological-controlinvasive-species-managementherbivoreaquatic-insectparthenogenesiswing-dimorphism

• Andricus

  oak gall wasps

  Andricus is a large and diverse genus of gall wasps in the family Cynipidae, comprising approximately 375 species—though many are considered taxonomically dubious. These tiny wasps are obligate gall inducers on oaks (Quercus spp.), with each species typically restricted to one or a few closely related host species. The genus exhibits complex life cycles involving alternation between sexual and asexual generations, often on different oak hosts or plant organs. Andricus is the most diverse genus in the tribe Cynipini and has a cosmopolitan distribution centered on the Northern Hemisphere, with species in Europe, Asia, North America, and Central America.

  gall-waspCynipidaeoakQuercusheterogonyparthenogenesisplant-insect-interactioncoevolutionspeciationparasitoid-host

• Andricus brunneus

  Clustered Gall Wasp

  Andricus brunneus is a small oak gall wasp found along the Pacific Coast of North America. Only females of this species are known to exist, indicating reproduction occurs through parthenogenesis. The species induces distinctive round galls on white oak leaves, particularly blue oaks (Quercus douglasii). Adults emerge in autumn.

  gall-waspoak-gallparthenogenesisPacific-CoastCynipidaeQuercusleaf-gall

• Andricus confertus

  Convoluted Gall Wasp

  Andricus confertus is a cynipid gall wasp endemic to California that induces distinctive pink, brain-like clustered galls on the underside of valley oak (Quercus lobata) leaves along the midrib. The species reproduces parthenogenetically, with female larvae initiating gall formation in summer and adults emerging the following spring. The galls are composite structures formed by multiple individual galls growing in close proximity.

  gall-waspcynipidoak-gallCalifornia-endemicparthenogenesisQuercus-lobataleaf-gall

• Andricus pisiformis

  Andricus pisiformis is a species of cynipid gall wasp in the tribe Cynipini, first described by Beutenmüller in 1911. Like other members of its genus, this wasp induces characteristic galls on oak trees (Quercus spp.). The species name 'pisiformis' refers to the pea-like shape of the galls it produces. As with many Andricus species, it exhibits a complex life cycle typically involving alternation between sexual and asexual generations on different oak hosts or plant parts, though specific details for this species remain incompletely documented.

  gall-waspcynipidoak-gallheterogonyparthenogenesisplant-manipulation

• Andricus quercuscalifornicus

  California Gall Wasp

  Andricus quercuscalifornicus is a cynipid gall wasp that induces large oak apple galls on white oaks, primarily the valley oak (Quercus lobata). The species is considered an ecosystem engineer due to its ability to manipulate plant tissue growth, creating complex microhabitats that support diverse insect communities. No male specimens have ever been recovered; reproduction occurs strictly through parthenogenesis.

  gall-waspcynipidoak-apple-gallparthenogenesisecosystem-engineerkeystone-speciesQuercus-lobatavalley-oak

• Andricus quercuspetiolicola

  Oak Petiole Gall Wasp

  Andricus quercuspetiolicola is a species of cynipid gall wasp that induces distinctive galls on white oaks (Quercus alba). The species name reflects its biology: 'quercus' for oak and 'petiolicola' indicating its habit of forming galls on leaf petioles and midribs. Adult wasps are small and inconspicuous, while the galls they produce are the most visible sign of their presence. Like other Andricus species, this wasp has a complex life cycle typically involving alternation between sexual and asexual generations on different oak tissues, though specific details for this species remain incompletely documented.

  Cynipidaegall-waspoak-gallQuercus-albapetiole-gallparasitoidparthenogenesisplant-manipulationspecialist-herbivore

• Andricus texanus

  Andricus texanus is a species of gall wasp in the family Cynipidae, a diverse group of insects that induce characteristic growths on oak trees. Like other members of its genus, this species manipulates plant tissue to form specialized structures that provide shelter and food for developing larvae. The specific gall morphology and host associations distinguish it from related Andricus species.

  cynipidaegall-waspoak-gallparasitoidplant-manipulationparthenogenesisQuercus

• Aneugmenus

  Aneugmenus is a genus of sawflies in the family Tenthredinidae. The genus includes at least eight described species distributed across the Holarctic and Neotropical regions. One species, Aneugmenus merida, has been studied in detail in the Venezuelan Andes, where it exhibits parthenogenesis and specialized herbivory on bracken ferns.

  sawflyparthenogenesisfern-feedingVenezuelan-AndesPteridium

• Anisandrus obesus

  Anisandrus obesus is an ambrosia beetle native to eastern North America that specializes in boring into the sapwood of Big Tooth Aspen (Populus grandidentata). Females construct characteristic gallery systems consisting of a single entrance tunnel approximately 7 mm deep followed by two lateral tunnels parallel to the wood surface. The species maintains an obligate symbiosis with ambrosia fungi, which larvae consume without expanding parental galleries. Progeny exhibit strongly female-biased sex ratios (approximately 6:1), with only females emerging in spring to disperse and attack new hosts.

  ambrosia-beetleScolytinaePopulus-grandidentatafungal-symbiosisparthenogenesissexual-dimorphism

• Anomopoda

  water fleas

  Anomopoda is a group of small aquatic crustaceans commonly known as water fleas, classified within Branchiopoda and Diplostraca. The group includes several families of ecological and scientific importance, with some species widely used as model organisms in evolutionary biology, ecology, and toxicology. Anomopods exhibit remarkable reproductive flexibility, alternating between parthenogenetic and sexual reproduction. They occupy diverse freshwater habitats across the globe and serve as critical components of aquatic food webs.

  freshwaterplanktonmodel-organismparthenogenesiscrustaceanwater-flea

• Antistrophus

  rosinweed stem gall wasp

  An undescribed species of cynipid gall wasp in the genus Antistrophus that induces distinctive stem-cluster galls on Silphium perfoliatum (cup plant). Like other Antistrophus species, it likely produces only female wasps through parthenogenesis, with adults emerging in fall to lay eggs in host plant stems. The galls provide shelter and food for developing larvae.

  gall-waspcynipidprairieSilphiumparthenogenesisstem-gallundescribed-species

• Anystis

  Whirligig Mites

  Anystis is a genus of predatory mites in the family Anystidae, commonly known as whirligig mites. Species in this genus are generalist predators of small arthropods, including mites, aphids, thrips, and other soft-bodied insects. They are frequently red in coloration with long legs, ranging from 500–1500 μm in size. The genus has gained attention for biological control applications, particularly Anystis baccarum, which has been documented in agricultural systems including apple orchards, raspberry crops, vineyards, and greenhouses.

  predatory-mitebiological-controlgeneralist-predatoragricultural-pest-managementparthenogenesiscannibalismtype-II-functional-response

• Anystis baccarum

  Whirligig mite

  Anystis baccarum is a cosmopolitan predatory mite in the family Anystidae, commonly known as the whirligig mite. It is a generalist predator of small, soft-bodied arthropods including aphids, spider mites, thrips, and other pests in agricultural systems. Populations consist entirely of females that reproduce by thelytokous parthenogenesis. The species has been identified as a promising biological control agent in crops such as raspberry, apple, sweet pepper, and tea, though its cannibalistic tendencies and long generation time limit its effectiveness as a sole control method.

  predatory-mitebiological-controlgeneralist-predatorparthenogenesisagricultural-pest-managementintegrated-pest-management

• Apatania

  Apatania is a genus of caddisflies in the family Apataniidae comprising at least 90 described species. The genus has a Holarctic distribution, with species recorded across Europe, Asia, and North America. Several species have been studied in detail for their larval morphology, life cycles, and behavior. Some species, including A. muliebris, are known to reproduce parthenogenetically.

  TrichopteraApataniidaecaddisflyaquatic-insectsHolarcticparthenogenesisacoustic-communicationcold-stenothermal

• Apataniidae

  Early Smoky Wing Sedges

  Apataniidae is a family of caddisflies (Trichoptera) commonly known as early smoky wing sedges. The family contains approximately 18 genera and at least 180 described species. Members are primarily Holarctic in distribution, with notable diversity in Europe, Asia, and North America. Larvae are aquatic and construct portable cases from mineral particles.

  Trichopteracaddisflyaquatic-insectsfreshwaterHolarcticparthenogenesisbioindicatorendemicmountain-streamscase-building-larvae

• Aphididae

  Aphids

  Aphididae is a very large family of sap-sucking insects in the order Hemiptera, containing several thousand described species. Members are soft-bodied, pear-shaped insects commonly known as aphids. The family includes the majority of plant virus vectors among insects, with approximately 200 known vector species. Many species are significant agricultural pests, causing direct damage through feeding and indirect damage through virus transmission.

  sap-suckingphloem-feederparthenogenesisagricultural-pestvirus-vectorhoneydew-producerant-mutualism

• Aphidina

  Aphidina is a subtribe of aphids within the family Aphididae, established by Latreille in 1802. It encompasses numerous genera including economically significant and xerophilous species. Members exhibit diverse life cycles, with some species amenable to genetic control methods due to their holocyclic heterogenetic reproduction. The subtribe includes species with specialized host associations, particularly on Asteraceae, Chenopodiaceae, and Amaranthaceae.

  aphidphloem-feedinghoneydewxerophilousparthenogenesisholocyclicpest

• Aphidoidea

  aphids, plant lice, greenflies, blackflies, whiteflies

  Aphidoidea is a superfamily of small sap-sucking insects within Hemiptera, commonly known as aphids. Members possess piercing-sucking mouthparts adapted for feeding on plant phloem. The superfamily includes approximately 5,000 described species across multiple families, with Aphididae being the largest and most economically significant. Many species exhibit complex life cycles involving both sexual and parthenogenetic reproduction, often with seasonal alternation between host plants.

  HemipteraSternorrhynchaphloem-feedingparthenogenesisagricultural-pestcornicleshoneydewant-mutualismvectorbiological-control

• Aphis

  Aphis is a large genus of aphids in the family Aphididae containing at least 400–600 species. The genus includes numerous significant agricultural pests, notably the soybean aphid (Aphis glycines), cotton aphid (Aphis gossypii), and apple aphid (Aphis pomi). Many species form mutualistic associations with ants (myrmecophily), exchanging honeydew for protection. Species identification within the genus often requires examination of morphological characters such as siphunculi and cauda structure.

  aphidagricultural-pestmyrmecophilephloem-feederparthenogenesishoneydewvectorinvasive-species

• Aphis cephalanthi

  Buttonbush aphid

  Aphis cephalanthi is a species of aphid in the family Aphididae, described by Thomas in 1878. The common name "Buttonbush aphid" reflects its association with its host plant, buttonbush (Cephalanthus species). Like other aphids in the genus Aphis, it is a sap-feeding insect with a typical aphid life cycle involving parthenogenetic reproduction during favorable conditions. The species is recognized in major taxonomic databases including GBIF, Catalogue of Life, and NCBI, though detailed biological studies appear limited in the available literature.

  aphidHemipteraAphididaesap-feederparthenogenesisbuttonbushCephalanthusNorth-AmericaThomas-1878

• Aphis craccivora

  cowpea aphid, groundnut aphid, black legume aphid

  Aphis craccivora is a small, dark-colored aphid of probable Palearctic origin that has become a cosmopolitan agricultural pest. It is polyphagous but shows strong preference for leguminous plants, particularly cowpea, groundnut, and alfalfa. The species reproduces primarily through parthenogenesis, with winged forms developing for dispersal. It is a significant pest due to direct feeding damage, honeydew production that promotes sooty mold growth, and its role as a vector for multiple plant viruses.

  agricultural-pestaphidvirus-vectorparthenogenesiscosmopolitanlegume-pesthoneydew-producer

• Aphis fabae

  black bean aphid, blackfly, bean aphid, beet leaf aphid

  Aphis fabae is a small, soft-bodied aphid in the family Aphididae, commonly known as the black bean aphid or blackfly. It is a significant agricultural pest with a broad host range, attacking beans, sugar beet, and numerous other crops. The species exhibits a heteroecious life cycle with host alternation between a woody primary host (Euonymus europaeus, spindle tree) and herbaceous secondary hosts. It reproduces parthenogenetically during the growing season and sexually in autumn, producing overwintering eggs. The aphid is capable of rapid population increase through viviparous reproduction, and winged forms develop seasonally to facilitate migration between host plants.

  agricultural-pestaphidHemipterahost-alternationheteroecyparthenogenesisviviparityvirus-vectorintegrated-pest-managementblackflybean-aphidbeet-leaf-aphidmodel-organisminvasive-potentialclimate-change-response

• Aphis glycines

  Soybean Aphid

  Aphis glycines, the soybean aphid, is a small (1–2 mm) invasive pest native to Asia that was first detected in North America in Wisconsin in 2000. It has since become established throughout the north-central United States, where it causes significant economic damage to soybean crops. The species reproduces rapidly and can develop extremely high densities on soybean foliage, with yield losses of up to 40% documented in heavily infested fields. Research has shown that aphid infestation can also increase plant susceptibility to other pests such as soybean cyst nematode.

  invasive-speciesagricultural-pestsoybean-pestparthenogenesisphloem-feeder

• Aphis nerii

  oleander aphid, milkweed aphid, sweet pepper aphid, nerium aphid

  Aphis nerii is a cosmopolitan aphid species in the family Aphididae, primarily associated with plants in the dogbane family (Apocynaceae), especially milkweeds (Asclepias) and oleander (Nerium oleander). The species exhibits complex reproductive strategies including parthenogenesis and viviparity, with winged and wingless female morphs. It is a significant pest of ornamental plants and a known vector of multiple plant viruses. The species has been introduced widely beyond its native range and is now found in tropical, Mediterranean, and temperate regions globally.

  aphidpestmilkweedmonarch-butterflyvirus-vectorparthenogenesisviviparitychemical-defensecardiac-glycosideornamental-pestbiological-controlintegrated-pest-management

• Aphis pomi

  apple aphid, green apple aphid

  Aphis pomi, the green apple aphid, is a small sap-sucking insect specialized on pomoideous host plants in the Rosaceae family, particularly apple (Malus domestica). It is autoecious, completing its entire life cycle on a single host species. The species reproduces primarily through parthenogenesis during the growing season, with sexual forms appearing only in autumn to produce overwintering eggs. It is morphologically similar to Aphis spiraecola but can be reliably distinguished by the length of the ultimate rostral segment.

  agricultural-pestparthenogenesisautoeciousant-mutualismapple-pestRosaceae-feederholocentric-chromosomesmolecular-identification-target

• Aphis spiraecola

  Spirea aphid, green citrus aphid, apple aphid

  Aphis spiraecola is a polyphagous aphid species described by Edith Marion Patch in 1914. It is a significant agricultural pest of citrus, apples, and numerous ornamental plants across temperate and tropical regions worldwide. The species exhibits remarkable host flexibility, colonizing over 65 plant genera across more than 20 families. It reproduces primarily through parthenogenesis across most of its range, with holocyclic populations producing sexual morphs on primary hosts Spiraea and Citrus. The species has displaced native Aphis pomi in some regions and is considered invasive in many areas where it has been introduced.

  agricultural-pestinvasive-speciespolyphagousparthenogenesisvirus-vectorcitrus-pestapple-pestaphididaeglobal-distributioninsecticide-resistanceDNA-barcoding-identification

• Appendiseta robiniae

  Black Locust Aphid

  Appendiseta robiniae, the black locust aphid, is the sole species in the monotypic genus Appendiseta. Native to North America, it has become established as an alien species in Europe, where it has adapted successfully to local conditions. In Poland, studies documented up to 11 generations per season on its host plant Robinia pseudoacacia, with females of the second and third generations showing highest fertility. The species exhibits rapid population growth capability due to its biological predispositions.

  aphidinvasive-speciesphloem-feederparthenogenesismultivoltineRobinia-pest

• Aproceros

  Aproceros is a genus of sawflies in the family Argidae, comprising ten recognized species native to eastern Asia. The genus gained international attention following the introduction of Aproceros leucopoda (elm zigzag sawfly) to Europe around 2003 and subsequently to North America in 2020. This invasive species has demonstrated rapid range expansion and significant defoliation capacity on elm trees (Ulmus spp.). Most Aproceros species remain restricted to their native East Asian ranges, with limited biological information available for the genus beyond A. leucopoda.

  sawflydefoliatorinvasive-speciesforest-pestparthenogenesisUlmuselmAsia-nativeEurope-introducedNorth-America-introduced

• Aproceros leucopoda

  elm zigzag sawfly

  Aproceros leucopoda, commonly known as the elm zigzag sawfly, is a small sawfly native to eastern Asia (China and Japan) that has become an invasive pest in Europe since 2003 and North America since 2020. The species derives its common name from the distinctive zigzag-shaped feeding pattern created by young larvae on elm leaves. Populations are entirely female and reproduce through thelytokous parthenogenesis, enabling rapid establishment from single individuals. The species can cause severe defoliation of elm trees and has recently been documented feeding on Japanese zelkova.

  invasive-speciesforest-pestdefoliatorparthenogenesisUlmusZelkovaHymenopteraArgidae

• Argas

  Bat-ticks

  Argas is a genus of soft ticks in the family Argasidae, containing 44 species across two subgenera: Argas and Persicargas. These ticks lack the hard dorsal shield characteristic of hard ticks (Ixodidae) and exhibit distinctive feeding behaviors, taking multiple short blood meals rather than prolonged single feedings. The genus includes species with exceptional longevity—Argas brumpti individuals have survived 27 years in laboratory conditions and endured eight years without feeding. Argas species serve as vectors for tick-borne pathogens including those causing tick-borne relapsing fever.

  soft-tickArgasidaevectorlongevityparthenogenesissperm-storagepoultry-pestbat-tickrelapsing-feverectoparasitemultiple-nymphal-stagesrapid-feedingstarvation-tolerance

• Atrusca trimaculosa

  Woollybear Gall Wasp

  Atrusca trimaculosa, commonly known as the woollybear gall wasp, is a cynipid gall wasp that induces distinctive round, hairy galls on oak leaves. The galls are 3–4 mm wide, covered in stiff hairs, and typically clustered on leaf surfaces. Only females of this species are known, suggesting reproduction may occur through parthenogenesis. The species is associated with several oak species including valley oak, blue oak, and Oregon oak.

  gall-waspcynipidoakparthenogenesisleaf-gallCaliforniaOregonHymenoptera

• Aulacorthum solani

  Foxglove aphid, Glasshouse-potato aphid

  Aulacorthum solani is a globally distributed agricultural pest aphid with one of the broadest host ranges of any aphid species, feeding on both dicots and monocots. It is a phloem-feeding hemipteran that causes direct feeding damage including stunted growth, leaf discoloration, and deformation, and serves as a vector for plant viruses. The species exhibits temperature-dependent development and reproduction, with optimal performance between 12.5–20°C and survival possible from 5–27.5°C. Both winged and wingless morphs occur, with parthenogenesis used for colony maintenance in laboratory settings.

  agricultural-pestvirus-vectorpolyphagousgreenhouse-pestparthenogenesisphloem-feederbiological-controlgenome-sequenced

• Barynotus

  Barynotus is a genus of broad-nosed weevils (Curculionidae: Entiminae) comprising 25 species distributed primarily in the Palaearctic region. These are relatively large weevils with predominantly nocturnal activity patterns. The genus exhibits diverse reproductive strategies, with some species being amphigonic and others parthenogenetic.

  CurculionidaeEntiminaeGeonemininocturnalpolyphagousparthenogenesisPalaearcticweevilbroad-nosed-weevilCarpathian-endemic

• Bdelloidea

  Bdelloid rotifers, bdelloids

  Bdelloidea is a class of microscopic rotifers found in freshwater habitats worldwide, comprising over 450 described species. These organisms are distinguished by obligate parthenogenetic reproduction—no males have ever been observed—and their remarkable ability to survive extreme desiccation through anhydrobiosis. They range from 150–700 μm in length and can remain dormant for years, with documented cases of revival after 24,000 years frozen in Siberian permafrost. Bdelloids have been called 'ancient asexuals' due to their estimated 25+ million year history of asexual reproduction supported by fossil evidence.

  parthenogenesisanhydrobiosisdesiccation-tolerancehorizontal-gene-transferancient-asexualcryptobiosisfreshwatermicroscopic

• Bosmina

  water flea

  Bosmina is a genus of small cladoceran crustaceans commonly known as water fleas. Members are distinguished from the related genus Bosminopsis by having antennae that are separated at their bases rather than fused. Bosmina species are filter feeders that consume algae and protozoans approximately 1–3 μm in size, using a dual feeding mechanism involving mesh-like setules on the second and third legs for filtering while the first leg grasps particles. The genus exhibits notable morphological plasticity, particularly in posterior mucrones and anterior antennules, which vary in response to predation pressure. Some Bosmina species have become invasive outside their native ranges, posing threats to aquatic ecosystems.

  cladocerazooplanktonfreshwaterfilter-feedermorphological-plasticityinvasive-specieswater-quality-indicatorparthenogenesisresting-eggspredator-prey-interactions

• Brachycaudus helichrysi

  leaf curl plum aphid, leaf-curling plum aphid, peach leaf curl aphid

  Brachycaudus helichrysi is a small aphid species first described by Kaltenbach in 1843. Molecular studies have revealed it comprises two cryptic sibling lineages, B. helichrysi H1 and H2, which are morphologically indistinguishable but genetically divergent and differ in life cycle strategies. H1 follows a typical heteroecious cycle with sexual reproduction on plum trees, while H2 consists largely of obligate asexual superclones with some sexual populations on peach trees in India.

  aphidpeststone-fruitvirus-vectorcryptic-speciesagricultural-pestparthenogenesisheteroecy

• Branchiopoda

  Branchiopods

  Branchiopoda is a class of small, primarily freshwater crustaceans unified by the presence of gills on their appendages—giving the group its name from Greek 'bránkhia' (gill) and 'poús' (foot). The class comprises fairy shrimp (Anostraca), tadpole shrimp (Notostraca), clam shrimp (Spinicaudata, Laevicaudata, Cyclestherida), and water fleas (Cladocera/Diplostraca), plus the extinct Devonian Lepidocaris. Most are filter-feeders on plankton and detritus, though notostracans are opportunistic omnivores. Many species inhabit temporary pools and produce desiccation-resistant resting eggs, allowing survival through dry periods.

  crustaceanfreshwaterzooplanktonfilter-feedertemporary-poolsparthenogenesisresting-eggsbioindicatoraquaculturemodel-organism

• Brevicoryne

  Brevicoryne is a genus of aphids (family Aphididae) comprising approximately 10 described species, several of which are significant agricultural pests. The most economically important species, Brevicoryne brassicae (cabbage aphid), infests crops in the Brassicaceae family worldwide. Members of this genus are characterized by their association with cruciferous host plants and are known vectors of plant viruses including Turnip mosaic virus and Cauliflower mosaic virus.

  aphidagricultural-pestBrassicaceaevirus-vectorparthenogenesisbiological-controlintegrated-pest-management

• Brevicoryne brassicae

  cabbage aphid, cabbage aphis, mealy cabbage aphid

  Brevicoryne brassicae, commonly known as the cabbage aphid, is a destructive agricultural pest native to Europe that has spread worldwide. The species feeds exclusively on plants in the family Brassicaceae, including cabbage, broccoli, Brussels sprouts, cauliflower, and other cultivated brassicas. Large colonies form on the undersides of young leaves and flower heads, causing significant yield losses through direct feeding damage and virus transmission. The aphid possesses a unique chemical defense mechanism, producing myrosinase enzyme and sequestering glucosinolates from host plants to release toxic mustard oil compounds when attacked.

  agricultural-pestaphidBrassicaceae-specialistchemical-defensemyrosinaseglucosinolatesvirus-vectorbiological-controlparthenogenesiscosmopolitan-distribution

• Bromius obscurus

  Western Grape Rootworm, Brown and Black Beetle

  Bromius obscurus is a small leaf beetle (Chrysomelidae: Eumolpinae) and the sole member of its genus. It is a Holarctic species with a notable geographic parthenogenesis pattern: North American populations reproduce sexually while European populations are triploid and reproduce asexually. The species is recognized as a pest of grape vines in Europe and western North America. Adults possess a stridulatory apparatus on the wings, the first documented in the subfamily Eumolpinae.

  leaf-beetleChrysomelidaeEumolpinaegrape-pestparthenogenesisgeographic-parthenogenesisHolarcticsymbiotic-bacteriastridulationvineyard-pest

• Brunneria

  stick mantis, Brunner's stick mantis

  Brunneria is a genus of slender, stick-like praying mantises native to the Americas. The genus contains six recognized species, with B. borealis being particularly notable as the only known obligate parthenogenetic praying mantis—reproducing exclusively asexually with no males ever observed. This species has spread across more than 2,400 km of coastal North America from a hypothesized single female introduction. Other species in the genus, all South American, reproduce facultatively with both sexes present.

  parthenogenesisasexual-reproductionwinglessgrasslandcrypticintroduced-speciesNorth-AmericaSouth-America

• Brunneria borealis

  Northern Grass Mantis, Brunner's Mantis, Brunner's Stick Mantis

  Brunneria borealis is a slender green mantis native to the southern United States, notable as the only mantis species known to reproduce exclusively through parthenogenesis. All individuals are female; no males have been documented. Adults reach approximately 77 mm in length and possess reduced wings that likely preclude flight. The species inhabits grassland habitats and exhibits stick-like camouflage behavior.

  parthenogenesisflightlessgrasslandnocturnalcrypticnativesoutheastern-US

• Bryobia

  clover mites

  Bryobia is a genus of spider mites in the family Tetranychidae, comprising over 130 described species with difficult taxonomy and many likely synonyms. These mites are among the largest spider mites, visible to the naked eye, and are distinguished by the arrangement of setae on their bodies. Most species reproduce asexually through thelytokous parthenogenesis, producing all-female populations. Several species are economically significant agricultural pests, including B. praetiosa (clover mite), B. rubrioculus (brown mite), and B. kissophila (ivy mite).

  spider-mitesagricultural-pestsparthenogenesisWolbachiaclover-mitesfruit-tree-pestsgreenhouse-pestsinvasive-specieshome-invaders

• Caenis

  Common Square-gills

  Caenis is a genus of small mayflies in the family Caenidae, commonly known as "square-gilled mayflies." Adults are among the smallest mayflies, with some species measuring only 3–4 mm in body length. The genus is globally distributed across multiple continents and serves as an indicator taxon for aquatic ecosystem health. Nymphs inhabit various freshwater environments, and adults emerge in synchronized events.

  mayflysquare-gillEphemeropteraCaenidaeaquatic-insectbioindicatorEPT-indexparthenogenesismultivoltinedegree-day-development

• Caliroa cerasi

  pear slug, cherry slug, cherry slimy sawfly

  Caliroa cerasi, commonly known as the pear slug or cherry slug, is a sawfly (Hymenoptera: Tenthredinidae) whose larvae are significant pests of stone and pome fruit trees. The species exhibits a complex life cycle with bivoltine and univoltine generations, and populations can shift between deuterotokous (producing both sexes) and thelytokous (female-only) parthenogenesis during outbreak cycles. Native to Europe, it has spread to multiple continents including North America, Asia, and Australasia. While capable of causing serious defoliation, it is generally considered a secondary pest in intensive orchards due to susceptibility to insecticides.

  pestsawflyparthenogenesisdiapausefruit-tree-pestbiological-controlRosaceae-feeder

• Calliodis

  Calliodis is a genus of minute pirate bugs in the family Anthocoridae, established by Reuter in 1871. The genus is placed in the tribe Scolopini. At least one species, C. maculipennis, has been documented to reproduce by constant parthenogenesis. Adults of C. temnostethoides have been observed in dead-leaf clusters of black oak following wind disturbance events.

  Anthocoridaeminute-pirate-bugspredatorparthenogenesisdead-leaf-habitatunder-bark

• Callirhytis

  Callirhytis is a genus of gall wasps comprising more than 90 described species, all members of the family Cynipidae. These wasps are specialized herbivores that induce the formation of galls on oak trees (Quercus spp.) in North America. The genus exhibits complex life cycles with alternating sexual and asexual generations, often producing morphologically distinct galls. Callirhytis species are among the most extensively studied cynipids due to their ecological importance and the structural diversity of their galls.

  gall-waspoak-gallCynipidaeNorth-Americaheterogonyparthenogenesisplant-insect-interaction

• Callirhytis clavula

  Callirhytis clavula is a species of gall wasp in the family Cynipidae, known to induce galls on oak trees (Quercus). Like other members of the genus Callirhytis, it exhibits a complex life cycle involving alternating generations that produce different gall types on different plant tissues. The species is native to eastern North America, with records from Canada and the United States. Specific details of its gall morphology and biology remain poorly documented in the primary literature.

  gall-waspcynipidoak-gallheterogonyparthenogenesisQuercus

• Callirhytis favosa

  Honeycomb leaf gall wasp

  Callirhytis favosa is a gall wasp in the family Cynipidae that induces distinctive honeycomb-patterned galls on oak leaves. The species exhibits the complex life cycle typical of many cynipids, with alternating sexual and asexual generations that produce different gall types on different oak tissues. The specific epithet 'favosa' refers to the honeycomb-like appearance of the galls.

  cynipidaegall-waspoak-gallhymenopteraleaf-gallalternating-generationsparthenogenesis

• Callirhytis pulchra

  Callirhytis pulchra is a species of gall wasp in the family Cynipidae, first described by Bassett in 1890. Like other members of its genus, this species induces distinctive galls on oak trees (Quercus spp.). The species exhibits the complex life cycles typical of Cynipidae, often involving alternating sexual and asexual generations that produce different gall types on different plant tissues. As an oak specialist, it contributes to the remarkable diversity of gall-forming insects associated with this tree genus in North America.

  gall-waspoak-gallCynipidaeparthenogenesisplant-manipulationNorth-America

• Callirhytis quercuscornigera

  Horned Oak Gall Wasp

  Callirhytis quercuscornigera, the horned oak gall wasp, is a cynipid wasp that forms distinctive woody galls on oak twigs. The species exhibits complex heterogony—a cyclical parthenogenesis with alternating sexual and asexual generations that produce different gall types on different oak tissues. The horned twig galls are large, woody structures with conspicuous horn-like projections through which adult wasps emerge. Heavy infestations have been documented to contribute to decline and mortality of pin oaks, particularly in urban and suburban settings.

  gall-waspcynipidoak-pestheterogonyparthenogenesisforest-entomologyurban-pest

• Callirhytis quercusgemmaria

  Callirhytis quercusgemmaria is a gall wasp in the family Cynipidae that induces galls on oak (Quercus) species. Like other members of the genus Callirhytis, this species has a complex life cycle involving alternating generations that produce different gall types on different parts of the host plant. The specific epithet 'quercusgemmaria' refers to its association with oak buds or gemmae. This species is part of the highly diverse oak gall wasp fauna of North America, where more than 1,300 cynipid species have been described, most with intimate host relationships with particular oak species.

  gall-waspcynipidoak-gallheterogonyparthenogenesisplant-insect-interaction

• Callirhytis quercuspunctata

  Gouty Oak Gall Wasp

  Callirhytis quercuspunctata, commonly known as the Gouty Oak Gall Wasp, is a cynipid gall wasp that induces gouty oak galls on oak trees. Like other members of the genus Callirhytis, this species has a complex life cycle involving alternating generations that produce distinct gall types on different oak tissues. The wasp manipulates oak growth through chemical secretions to create protective structures housing developing larvae. The species is associated with oaks (Quercus spp.) and has been documented across eastern North America.

  gall-waspcynipidoak-gallgouty-gallparthenogenesisheterogony

• Camisia

  Camisia is a genus of oribatid mites (Oribatida) in the family Crotoniidae, comprising 34 species and one subspecies worldwide. These large mites (>1 mm) are primarily arboreal, inhabiting tree trunks, forest canopies, and moss-lichen communities on rocky surfaces. The genus exhibits distinctive morphological adaptations including cuticular secretions that bind sand grains to the body surface. Camisia is notable for its complex taxonomic history, having been classified in both Crotoniidae and Camisiidae families by different authorities.

  oribatid-mitesarboreal-mitessoil-faunaparthenogenesisCarpathian-fauna

• Carausius morosus

  Indian Walking Stick, Common Stick Insect, Laboratory Stick Insect

  Carausius morosus is a parthenogenetic phasmid native to Tamil Nadu, India, widely distributed globally through accidental introductions and captive culture. Females reproduce without males; no wild males have been reported, though gynandromorphs occasionally occur in captivity. The species is nocturnal, feeding at night and remaining motionless during daylight hours. It has become established outside its native range in locations including Great Britain, Portugal, South Africa, and the United States, where it occasionally damages ornamental plants.

  parthenogenesislaboratory-modelintroduced-speciesnocturnalthanatosisIndiaphasmidstick-insect

• Cavariella

  Willow-Umbellifer Aphids

  Cavariella is a genus of aphids in the family Aphididae, tribe Macrosiphini. It is distinguished from other Macrosiphini genera by a supra-caudal process on abdominal tergite VIII bearing two distal setae. The genus has a Holarctic distribution with approximately half its species occurring in Asia. Species in this genus exhibit a characteristic life cycle involving primary hosts in Salicaceae (willows) and secondary hosts in Apiaceae (umbellifers), making them economically significant as pests of carrot and other crops.

  aphidMacrosiphiniHolarcticwillow-umbelliferagricultural-pestvirus-vectorholocyclicparthenogenesisApiaceaeSalicaceae

• Ceratina

  Small Carpenter Bees

  Ceratina is a cosmopolitan genus of small carpenter bees comprising over 300 species in approximately 23 subgenera. These bees nest in dead wood, stems, or pith, excavating linear galleries with partitioned brood cells. Social behavior varies widely within the genus, ranging from solitary to facultatively eusocial, with some species exhibiting cooperative brood care and others demonstrating biparental care. The genus originated in the Afrotropics and has achieved global distribution except Antarctica. Ceratina serves as an important model for studying the evolutionary origins of social behavior in insects.

  pollinatorcarpenter-beesocial-insectstem-nesting-beefacultatively-eusocialparthenogenesisglobal-distribution

• Ceratina dallatorreana

  Dalla Torre's ceratina

  Ceratina dallatorreana is a small carpenter bee in the family Apidae, first described by Friese in 1896. The species exhibits a rare reproductive strategy among bees: it reproduces exclusively by parthenogenesis and never produces males. This bee has been documented across three continents—Africa, Europe and Northern Asia (excluding China), and North America—making it one of the more broadly distributed Ceratina species. Its wide geographic range and unique reproductive biology distinguish it from most other small carpenter bees.

  parthenogenesisthelytokycarpenter-beesmall-carpenter-beeapidaepollinatorwidespread-distribution

• Ceroplastes

  wax scales

  Ceroplastes is a genus of wax scales in the family Coccidae, comprising more than 130 described species. These insects are characterized by the conspicuous white, waxy coverings they secrete, which protect their soft bodies. Adults are largely sessile and feed on plant sap using piercing-sucking mouthparts. Many species are economically significant pests of ornamental plants, fruit trees, and shrubs. The genus exhibits parthenogenesis in many species, with females reproducing without males. Climate change has facilitated the northward expansion of several species from southern regions into previously cooler areas.

  scale-insectpesthorticultureagricultureparthenogenesisinvasive-speciesclimate-changesooty-moldhoneydewornamental-plants

• Ceroplastes cirripediformis

  barnacle scale, barnacle wax scale

  Ceroplastes cirripediformis, commonly known as the barnacle scale or barnacle wax scale, is a soft scale insect (Hemiptera: Coccidae) recognized for its distinctive waxy covering that resembles a small barnacle. It is a destructive invasive pest with a broad host range spanning numerous plant families. The species has expanded its range globally through human-mediated transport and climate change, with established populations across North America, South America, Europe, Asia, Africa, and Oceania. Females reproduce parthenogenetically, producing up to a thousand eggs annually without observed males in wild populations.

  invasive-speciesscale-insectagricultural-pestornamental-pestparthenogenesisclimate-changehoneydewsooty-moldwax-coveringCoccidaeHemiptera

• Ceroplastes sinensis

  Chinese Wax Scale

  Ceroplastes sinensis is a cosmopolitan scale insect pest of commercial citrus and other woody plants. Native to Central or South America based on cladistic analysis, it has established populations across temperate regions including Australia, New Zealand, Mediterranean Europe, North America, and parts of Asia. The species produces a distinctive waxy covering and completes a single annual generation in temperate climates. It has become a significant agricultural pest, particularly in citrus groves, prompting development of integrated pest management sampling protocols and biological control efforts.

  scale-insectcitrus-pestbiological-controlinvasive-speciesintegrated-pest-managementwax-scaleHemipteraCoccidaeparthenogenesisthelytokycladistic-biogeography

• Chaetosiphon

  strawberry aphid

  Chaetosiphon is a genus of aphids in the family Aphididae, comprising species specialized on Rosaceae hosts, particularly strawberries (Fragaria) and roses (Rosa). The genus includes economically significant agricultural pests, most notably Chaetosiphon fragaefolii, which vectors multiple strawberry viruses. Species in this genus exhibit complex life cycles with both holocyclic (sexual) and anholocyclic (parthenogenetic) populations, and show morphological variation in karyotype and chaetotaxy that has complicated taxonomic classification.

  aphidstrawberry-pestvirus-vectoragricultural-pestRosaceae-specialistinvasive-speciesparthenogenesisalary-polymorphismbiological-control

• Chaitophorus

  Poplar aphids, Willow aphids

  Chaitophorus is a genus of aphids comprising approximately 90–110 species distributed across North America, Europe, and Asia. Members are primarily associated with Salicaceae hosts, particularly Populus (poplars) and Salix (willows), though some species occur on Vitaceae, Apiaceae, and Asteraceae. The genus exhibits host-specificity, with species-level identification often requiring knowledge of the host plant due to subtle morphological differences. Multiple independent origins of ant mutualism have been documented within the genus.

  aphidphloem-feederant-mutualismpoplar-pesthost-specificSalicaceaeviviparousparthenogenesiscamouflagedimorphism

• Ciidae

  Minute Tree-Fungus Beetles, Shelf Fungus Beetles

  Ciidae, commonly known as minute tree-fungus beetles or shelf fungus beetles, are a family of small beetles within the superfamily Tenebrionoidea. Adults and larvae inhabit fruiting bodies of bracket fungi (Polyporales), particularly Polyporaceae and Corticiaceae, where they burrow inside the fungal tissue. The family is most diverse in warmer regions but has a cosmopolitan distribution extending to northern latitudes including Scandinavia. Development from egg to adult can occur in as little as two months, and some species are parthenogenetic. A few species, notably Cis chinensis, are recognized as pests of commercially dried fungi.

  fungus-beetlesbracket-fungiPolyporalesmycophagousTenebrionoideacosmopolitanparthenogenesisstored-product-pest

• Cinara

  giant conifer aphids, conifer aphids

  Cinara is a genus of aphids comprising approximately 200-243 species, commonly known as giant conifer aphids. These insects are specialized feeders on conifers in the families Pinaceae and Cupressaceae, including pines, firs, spruces, cedars, and cypresses. Molecular studies indicate their tribe Eulachnini represents the basal group for other aphids. Several species are significant pests of cultivated Christmas trees, particularly Fraser fir production in the southeastern United States.

  aphidsconifersforest-pestsChristmas-treeshoneydewphloem-feedersparthenogenesisNorthern-Hemisphere

• Cinara curvipes

  Bow-legged Fir Aphid

  Cinara curvipes is a large, black bark aphid native to North America that has become invasive in Central Europe since 2000. Adults measure 4.5–5.3 mm. The species exhibits remarkable life cycle flexibility, with populations capable of both holocyclic (sexual) and anholocyclic (parthenogenetic) reproduction. In its invaded range, it can form exceptionally large colonies of thousands of individuals by May—a phenomenon not observed in native European Cinara species. The aphid secretes copious honeydew throughout most of the year, supporting diverse insect communities.

  invasive-speciesaphidbark-aphidhoneydew-producerparthenogenesisholocyclicanholocyclicAbies-pestCentral-Europe-invasionclimate-change-adaptation

• Cinara laricifex

  Black Larch Aphid

  Cinara laricifex, commonly known as the Black Larch Aphid, is a conifer-feeding aphid in the family Aphididae. This species specializes on larch (Larix) as its host plant. Like other Cinara aphids, it possesses piercing-sucking mouthparts adapted to tap into the phloem of its host tree. The species is part of a genus that includes significant pests of Christmas tree production and forestry.

  aphidconifer-pestphloem-feederparthenogenesishoneydew-producer

• Cinara pinea

  Large Pine Aphid

  Cinara pinea, the Large Pine Aphid, is a specialized phloem-feeding insect that colonizes Pinus species, particularly Scots pine (Pinus sylvestris). It exhibits distinctive seasonal population dynamics, with spring peaks driven by host plant amino acid availability, followed by summer declines during drought conditions and partial autumn recoveries after rainfall. The species overwinters as eggs laid on current-year needles, with approximately 50% egg mortality between oviposition and hatching. Winged morphs (alatae) are produced only during June and early July, contingent on both crowding and active host shoot growth.

  aphidpinephloem-feederhoneydew-producerseasonal-dynamicsparthenogenesisforestry-pest

• Cinara strobi

  White Pine Aphid

  Cinara strobi, the white pine aphid, is a large aphid species specialized on white pine (Pinus strobus). It is notable for exceptionally high autumn populations that produce copious honeydew, attracting stinging wasps and creating nuisance conditions. The species exhibits parthenogenetic reproduction during the growing season, with live birth of nymphs accelerating population growth. Uniquely among Cinara aphids, C. strobi harbors three bacterial endosymbionts—Buchnera aphidicola, Sodalis sp., and Serratia symbiotica—representing an intermediate stage of symbiont replacement where the latter has become metabolically incompetent yet persists.

  aphidwhite-pinehoneydewparthenogenesisendosymbiontSerratia-symbioticaBuchneraSodalisautumn-pestSternorrhyncha

• Cladocera

  water fleas

  Cladocera is a suborder of small crustaceans commonly known as water fleas, ranging from 0.2–6 mm in size. They are found in freshwater environments worldwide, including rivers, lakes, swamps, and temporary pools, with some species inhabiting brackish water, groundwater, and even leaf axils or caves. These organisms play a central role in freshwater food webs as filter-feeders that consume phytoplankton, bacteria, and organic particles, while serving as essential prey for fish fry and predatory insect larvae. Their sensitivity to environmental changes makes them valuable bioindicators for water quality assessment.

  zooplanktonfreshwater-ecologybioindicatorfilter-feederparthenogenesisresting-eggswater-qualitymodel-organismBranchiopodaDaphniafood-webpaleolimnologyaquatic-microcrustacean

• Cladotanytarsus

  Cladotanytarsus is a genus of non-biting midges (Chironomidae) containing over 80 described species with worldwide distribution, particularly diverse in the Holarctic region. The genus comprises two subgenera: Cladotanytarsus s. str. and Lenziella. Species are primarily lacustrine, with adults often associated with lake surroundings and larvae inhabiting freshwater sediments. Several species have been described from experimentally acidified lakes in North America, demonstrating tolerance to varying pH conditions. One species, C. lewisi, is a significant human allergen source in Sudan.

  Chironomidaenon-biting-midgesfreshwaterlakebioindicatorallergenparthenogenesisHolarctic

• Coccotrypes dactyliperda

  date stone beetle, button beetle, palm seed borer

  Coccotrypes dactyliperda is a small scolytine weevil (1.8–2.3 mm) that spends nearly its entire life cycle inside palm seeds, particularly those of date palms (Phoenix dactylifera). Native to Africa and the Middle East, it has achieved cosmopolitan distribution through international trade in dates and horticultural palm seeds. The species is a significant agricultural pest, causing 20–40% yield losses in unprotected date plantations by attacking green, unripe fruit and causing premature fruit drop. It employs a haplodiploid sex-determination system with extensive inbreeding, enabling rapid population growth within individual seeds that can support 70–80 beetles through multiple overlapping generations.

  pestagriculturalseed-borerhaplodiploidinbreedingcosmopolitanparthenogenesisparental-care

• Coccus viridis

  green scale, green coffee scale, coffee green scale

  Coccus viridis is a soft scale insect (Hemiptera: Coccidae) and major agricultural pest with a wide tropical and subtropical distribution. It reproduces parthenogenetically via thelytoky, with females producing 50-600 eggs that hatch within minutes to hours beneath the mother's body. The species completes its life cycle in 47-51 days at 25°C, with three nymphal instars before adulthood; first-instar nymphs actively disperse as 'crawlers' while older instars and adults become sessile. It is polyphagous, feeding on phloem sap of over 200 plant genera in 72 families, with primary economic damage to coffee, guava, and cacao crops.

  agricultural-pestcoffee-pestsoft-scaleparthenogenesisthelytokypolyphagyant-mutualismhoneydewsooty-moldbiological-controlinvasive-speciestropical-pestphloem-feederHemipteraCoccidaeCoccusgreen-scalegreen-coffee-scale

• Colopha ulmicola

  Elm Cockscomb Gall Aphid

  Colopha ulmicola is an aphid species that induces distinctive cockscomb-shaped galls on American elm leaves. It has a complex life cycle involving alternation between elm hosts and grass roots, with parthenogenetic reproduction within galls and sexual reproduction producing winged migrants that return to elm in autumn. The species is notable for its dramatic seasonal aerial migrations and its ability to manipulate plant development through chemical secretions.

  gall-formingaphidelmhost-alternationparthenogenesisplant-manipulationseasonal-migration

• Cynipidae

  Gall Wasps, Gallflies

  Cynipidae is a family of minute wasps (1–8 mm) renowned for inducing plant galls—abnormal growths that provide shelter and nutrition for developing larvae. The family comprises approximately 1,300 described species worldwide, with major radiations on oaks (Quercus) and roses (Rosa). Many species exhibit complex life cycles involving alternation of sexual and asexual (parthenogenetic) generations, often producing morphologically distinct galls. Gall induction involves chemical manipulation of host plant tissue, with enlarged venom glands implicated in this process. The family evolved from parasitoid ancestors and represents one of the most diverse groups of gall-forming insects.

  gall-formingplant-manipulationparthenogenesisoak-associatedrose-associatedinquilinebiocontrolvenom-glands

• Cynipini

  Oak Gall Wasps

  Cynipini is the largest tribe of gall wasps in the family Cynipidae, comprising approximately 936 to 1,000 described species. Members are commonly known as oak gall wasps due to their specialized association with oaks (Quercus) and other Fagaceae. The tribe is primarily distributed in the Holarctic region, with significant diversity also in Mexico and Central America. Cynipini species induce structurally diverse galls on various oak tissues including leaves, buds, branches, petioles, catkins, acorns, and roots. Most species exhibit cyclical parthenogenesis, alternating between sexual and asexual generations that often produce different gall morphotypes on the same or different host tissues.

  gall-waspsoak-gall-waspsCynipidaeQuercusparthenogenesisheterogonygall-inductionecosystem-engineersinquilinesparasitoidsHolarcticMexico-biodiversityFagaceae

• Cynipoidea

  Gall Wasps and Allies

  Cynipoidea is a superfamily of small wasps comprising approximately 3,000 described species across seven extant families, with many undescribed species estimated. The group exhibits diverse life histories: while the family Cynipidae (gall wasps) are phytophagous and induce plant galls, the majority of species are parasitoids or hyperparasitoids of other insects. The superfamily is taxonomically challenging, with family-level identification historically difficult until the publication of a comprehensive illustrated key in 2020.

  parasitoidgall-formerhyperparasitoidbiological-controloak-forestinquilinealternation-of-generationsundescribed-diversityreduced-wing-venationHymenopteraApocritaecosystem-engineerplant-manipulationforest-insectagricultural-pest-controlDrosophila-suzukiiaphid-hyperparasitoidwood-borer-parasitoiddung-breeding-fly-parasitoidtaxonomic-keygall-communitynutrient-cyclingphenologysexual-dimorphismparthenogenesiskoinobiontidiobiontPalaearctic-diversityNearctic-diversityMediterranean-hotspotoak-gallrosinweed-gallgoldenrod-gallintroduced-speciesadventive-faunaNew-Zealand-faunaTurkish-faunabroadleaf-forestprairie-habitatagricultural-systemsoft-fruit-pestintegrated-pest-managementbiocontrol-agentextension-entomologymicrohymenopteramorphological-keycouplet-identificationmetasomal-fusionpetiole-reductionglossy-integumentcompressed-bodyprognathous-headflagellomere-reductionnotauli-reductionpterostigma-presencehamuli-presenceovipositor-structurehypopygium-developmentlarval-chamberlocularity-formationhost-genome-exploitationroom-service-nutritiondefensive-immune-suppressionSWD-biocontroleucoiline-waspcharipine-hyperparasitoidanacharitine-parasitoidemarginine-parasitoidfigitine-parasitoidibaliine-parasitoidliopterine-parasitoiddiplolepidine-gall-formerpediaspine-gall-formeraulacideine-gall-formeraylacine-gall-formerceroptresine-inquilinecynipine-gall-formerdiastrophine-gall-formereschatocerine-gall-formerphanacidine-gall-formerqwaqwaiine-gall-formersynergine-inquilineBeringian-biogeographyEocene-forest-separationclimate-change-habitat-shiftphenological-form-associationearly-oak-phenoformlate-oak-phenoformQuercus-robur-gall-communityQuercus-cerris-gall-communityQuercus-ilex-gall-communityAsteraceae-gall-formerEucalyptus-gall-formerRosaceae-gall-formerFagaceae-gall-formerBrevicoryne-brassicae-hyperparasitoidAphidiinae-hyperparasitoidAphelinus-hyperparasitoidOphelimus-parasitoidMikeius-parasitoidAntistrophus-gall-formerNeuroterus-gall-formerAndricus-gall-formerCynips-gall-formerDiplolepis-gall-formerCallirhytis-gall-formerSaphonecrus-inquilineSynergus-inquilineLithosaphonecrus-inquilineCerroneuroterus-gall-formerParaganaspis-parasitoidTriplasta-parasitoidConeucoela-parasitoidAlloxysta-hyperparasitoidPhaenoglyphis-hyperparasitoidXyalaspis-adventiveGanaspis-adventiveThoreauella-adventiveAnacharis-nativeKleidotoma-nativeTrybliographa-groupKleidotoma-groupGronotoma-groupRhoptromeris-groupGanaspis-groupChrestosema-groupZaeucoila-groupAfrotropical-lineageNeotropical-lineageleaf-mining-agromyzid-parasitoidagromyzid-parasitoidcabbage-aphid-hyperparasitoidbovine-dung-dipteran-parasitoidcattle-dung-parasitoidpasture-ecosystem-serviceforest-biodiversity-indicatorcollection-based-taxonomymolecular-phylogeneticscladistic-analysisimplied-weights-parsimonyskeletal-character-codingdigital-image-databaseInternet-accessible-databasehigher-level-phylogenygeneric-classification-revisiongenus-group-systeminformal-genus-groupssynapomorphy-discussionhost-parasitoid-coevolutionevolutionary-radiationtropical-parasitoid-diversitybiodiversity-documentationscientific-nomenclatureetymological-analysishost-based-species-naminggeographic-namingmorphological-namingdedication-namingtaxonomic-communicationbiodiversity-informaticsfaunistic-surveynew-country-recordnew-provincial-recordnew-genus-recordnew-species-descriptionspecies-redescriptiondichotomous-key-constructioncharacter-coupletillustrated-identificationmicroscope-photographyspecimen-imagingstudent-tested-keyexpert-consultationproofed-keyextension-entomology-applicationstakeholder-educationforest-managementfarm-managementfield-managementecosystem-service-valuationfuture-policy-implementationmicrohymenopteran-collectiondiagnostic-indicator-applicationobjective-setting-for-conservationclimate-change-monitoringhabitat-fragmentation-responseoak-stand-compositionurban-oak-forestnursery-oak-cultivationgeomorphic-topographic-structure-influencespecies-richness-patterndistribution-mappinghost-plant-documentationgall-morphology-documentationseasonal-gall-collectionmulti-year-field-studyprovince-level-inventoryregional-fauna-characterizationcountry-level-checklistglobal-fauna-overviewadventive-species-dominancedeliberate-introduction-historybiological-control-introductionnative-species-rarityendemic-species-presencecollection-revisiontype-specimen-examinationreared-specimen-basisdiagnosis-illustrationdistribution-data-compilationhost-relation-discussionbiology-documentationnatural-history-summarytaxonomic-overview-provisionfaunal-knowledge-gap-identificationresearch-accessibility-improvemententry-barrier-reductioncool-thing-discovery-enablement

• Cyphomyrmex

  fungus-growing ants

  Cyphomyrmex is a genus of small, drab-colored fungus-growing ants in the tribe Attini, found primarily in the Neotropics. These ants cultivate fungi in the tribe Leucocoprineae as their primary food source, with most species growing fungal nodules rather than full mycelial gardens. Colonies are typically monogynous and small, rarely exceeding 500 workers. The genus is divided into two species complexes: the strigatus complex (South America only) and the rimosus complex (southern North America to South America). Cyphomyrmex represents a basal lineage among attine ants and serves as sister group to Mycetophylax.

  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• Dahlica triquetrella

  Narrow Lichen Bagworm, Narrow Lichen Case-bearer

  Dahlica triquetrella is a small bagworm moth in the family Psychidae, notable for its distinctive triangular larval case and unusual reproductive biology. The species exists in both sexual and parthenogenetic forms, with the latter being far more widespread. Sexual populations are restricted to isolated glacial refugia in Central Europe, while parthenogenetic populations span much of Europe and have been introduced to North America. The species is specialized on lichen-feeding and is often overlooked due to the small size and cryptic appearance of its larval cases.

  Psychidaebagwormparthenogenesislichen-feedersexual-dimorphismglacial-relictcase-bearer

• Daktulosphaira

  grape phylloxera

  Daktulosphaira is a genus of phylloxerid insects within Hemiptera, containing the economically devastating grape phylloxera D. vitifoliae. Members are small, aphid-like insects that induce distinctive galls on grapevines (Vitis spp.) and are obligate specialists on this host genus. The genus is notable for extremely high transcriptional plasticity when transferred between host genotypes, with over one-third of expressed genes showing differential expression. D. vitifoliae exhibits both root-feeding and leaf-galling forms, with complex life cycles involving parthenogenetic and sexual reproduction. The genus is native to eastern North America but has become a global pest of commercial viticulture.

  phylloxeragrape-pestgall-formerphloem-feederviticulture-pestbioindicatortranscriptional-plasticityinvasive-speciesparthenogenesisVitis-specialist

• Daktulosphaira vitifoliae

  Grape Phylloxera

  Daktulosphaira vitifoliae, commonly known as grape phylloxera, is a minute aphid-like insect in the family Phylloxeridae that is the most destructive pest of commercial grapevines worldwide. Native to eastern North America, it was accidentally introduced to Europe in the 1860s, where it devastated Vitis vinifera vineyards and nearly destroyed the wine industry. The insect has a complex life cycle involving both root-feeding and leaf-galling forms, with high transcriptional plasticity enabling rapid adaptation to different host grapevine genotypes. It reproduces parthenogenetically for most generations but can produce sexual forms and overwintering eggs under certain conditions.

  phylloxeragrape-pestgall-formeragricultural-pestVitis-specialistinvasive-speciesparthenogenesistranscriptional-plasticity

• Daphnia

  water fleas, water-fleas

  Daphnia is a genus of small planktonic crustaceans (0.2–6.0 mm) in the order Anomopoda, commonly called water fleas due to their saltatory swimming style. The genus comprises over 200 species distributed across diverse freshwater habitats worldwide. Daphnia exhibits cyclical parthenogenesis, alternating between asexual and sexual reproduction, and serves as a keystone organism in freshwater food webs. Several species, particularly D. magna and D. pulex, are extensively used as model organisms in ecology, toxicology, and evolutionary biology research.

  crustaceanplanktonfreshwatermodel-organismfilter-feederparthenogenesiswater-fleatoxicologyinvasive-speciesindicator-species

• Demotina

  Demotina is a genus of leaf beetles in the subfamily Eumolpinae containing over 50 described species. The genus is native to Asia, Australia, and Oceania, with one adventive species (Demotina modesta) established in the southeastern United States. Some species are known to be parthenogenetic. One species, Demotina fasciculata, has been documented engaging in cecidophagy—feeding on plant galls induced by cynipid wasps.

  leaf-beetlesEumolpinaececidophagyparthenogenesisadventive-speciesgall-feedingQuercusChrysomelidae

• Desmonomata

  Desmonomata is an infraorder of oribatid mites (beetle mites) within the suborder Oribatida. The group is notable for its exceptionally high incidence of thelytokous parthenogenesis: four of seven families are completely female-producing, and a fifth is nearly so. This reproductive mode appears obligate and ancient, with speciation and evolutionary radiation having occurred without biparental reproduction.

  parthenogenesisthelytokyoribatidamitesacarireproductive-biologyevolutionary-radiationcryptic-species-risk

• Dineura

  Dineura is a genus of sawflies in the family Tenthredinidae. Species occur in the West Palaearctic, Easternmost Asia, and North America. The genus contains at least four recognized West Palaearctic species, with taxonomic revisions clarifying species boundaries and synonymies. Reproductive behavior has been studied in D. virididorsata, which exhibits arrhenotokous parthenogenesis.

  sawflyTenthredinidaeHymenopteraarrhenotokyparthenogenesis

• Dinocampus coccinellae

  Ladybird Parasitoid Wasp

  Dinocampus coccinellae is a solitary braconid wasp that parasitizes lady beetles (Coccinellidae). The female wasp deposits a single egg into the host's abdomen, where the larva develops through four instars over 18–27 days before emerging. Upon emergence, the larva paralyzes the host and spins a cocoon attached to the ladybird's legs. The paralyzed host remains alive, twitching occasionally, and serves as a protective bodyguard that deters predators with its bright coloration and defensive movements. Approximately 25% of hosts recover after the wasp completes development. The wasp is notable for co-injecting Dinocampus coccinellae paralysis virus (DcPV) with its egg, which facilitates host manipulation.

  parasitoidbraconidlady-beetle-parasitehost-manipulationDinocampus-coccinellae-paralysis-virusparthenogenesiszombie-hostbiological-controlhyperparasitismphenotypic-plasticity

• Diplolepis

  gall wasps, rose gall wasps

  Diplolepis is a genus of gall-inducing wasps in the family Diplolepididae, most commonly associated with roses (Rosa spp.). These small wasps are notable for inducing complex, often conspicuous galls on their host plants through chemical manipulation of plant tissues. The genus includes both sexual and parthenogenetic species, with some like D. rosae reproducing primarily by thelytokous parthenogenesis. Diplolepis species exhibit intricate life cycles involving alternation between sexual and agamic generations, and their galls support diverse communities of parasitoids and inquilines.

  gall-waspsCynipidaeDiplolepididaeRosaparthenogenesisthelytokybedeguarplant-gallsparasitoidsinquilinesHolarcticrose-pestsinduced-plant-structuresalternation-of-generationsagamic-generationsexual-generationovipositorchemical-ecologynutrient-regulationWolbachiagenomic-rearrangementmodel-organism

• Diplolepis bicolor

  spiny rose gall wasp, spiny bud gall wasp

  Diplolepis bicolor is a cynipid gall wasp that induces bud galls on wild roses (Rosa spp.) across North America. The species produces distinctive spiny galls measuring 10–12 mm in diameter on rose buds. It exhibits the typical cynipid life cycle with alternating sexual and parthenogenetic generations. The galls superficially resemble those of Diplolepis polita but can be distinguished by their location on buds rather than leaves.

  gall-waspcynipidrose-gallparthenogenesisalternating-generationsNorth-America

• Diplolepis gracilis

  Diplolepis gracilis is a species of gall wasp in the family Diplolepididae, first described by Ashmead in 1897. Like other members of its genus, it induces the formation of galls on host plants, likely within the rose family (Rosaceae) given the genus's strong association with this plant group. The species is recorded from multiple provinces across Canada including Alberta, British Columbia, Manitoba, and Ontario. As with most Diplolepis species, it exhibits a complex life cycle involving an alternation between sexual and parthenogenetic generations.

  gall-waspCynipidaeDiplolepididaeHymenopteragall-formerparthenogenesisalternation-of-generations

• Diplolepis nervosa

  Spiked Pea Gall Wasp

  Diplolepis nervosa is a gall wasp in the family Diplolepididae that induces distinctive spiked pea galls on wild roses (Rosa species). Like other members of its genus, it exhibits an alternation of generations with both sexual and parthenogenetic phases. The species is native to Europe and has been introduced to North America, where it has become established. The galls it produces are among the most recognizable of rose galls due to their characteristic spiny, pea-like appearance.

  gall-waspCynipidaeDiplolepididaeRosarose-gallparthenogenesisheterogonyintroduced-speciesEuropeNorth-America

• Diplolepis rosae

  Mossy Rose Gall Wasp, Rose Bedeguar Gall Wasp, Robin's Pincushion Gall Wasp

  A gall-inducing wasp in the family Diplolepididae that forms distinctive mossy, pincushion-like galls on wild roses, primarily Rosa canina and Rosa arvensis. The species is notable for its predominantly parthenogenetic reproduction, with fewer than 5% males in most populations. Females lay up to 60 eggs in developing rose buds, inducing chemically-driven plant tissue distortion that creates the characteristic bedeguar gall. The wasp has been introduced to North America alongside cultivated roses.

  gall-waspparthenogenesisRosabedeguarcynipidplant-insect-interactionthelytokyWolbachiainquilineparasitoidhyperparasitoidEuropeintroduced-specieslaboratory-modelgenomic-rearrangementseasonal-polyphenism

• Diplolepis rosaefolii

  Diplolepis rosaefolii is a gall wasp in the family Cynipidae that induces distinctive lenticular (lens-shaped) galls on the leaves of rose plants across Canada. The species exhibits an alternation of generations life cycle typical of cynipid wasps, with a bisexual spring generation producing the visible galls and an agamic (asexual) winter generation of wingless females. In Ontario and Quebec, it is primarily associated with native Rosa acicularis, though populations have been documented on the cultivated hybrid rugosa shrub rose 'Thérèse Bugnet'. The galls support a diverse component community including multiple parasitoid wasp species and inquilines.

  gall-waspcynipidaerose-gallsparasitoid-communityhost-shiftparthenogenesisalternation-of-generationslenticular-gallRosa-acicularisCanada

• Diplolepis spinosa

  many-spined twig gall wasp

  Diplolepis spinosa is a cynipid gall wasp native to North America that induces large, conspicuous, multichambered stem galls on wild and domestic roses. The species has been documented on Rosa blanda, Rosa acicularis, and Rosa rugosa, and has recently become established on domestic roses in central Canada. Its galls are among the most visible in grassland habitats across the continent. The wasp exhibits complex gall development involving eggs deposited in slits between leaf primordia near bud tips, with larvae inducing separate chambers within spherical stem galls.

  gall-waspcynipidrose-pestparthenogenesismultichambered-gallgrassland-indicator

• Diplostraca

  water fleas, clam shrimps

  Diplostraca is a superorder of small branchiopod crustaceans encompassing over 1,000 described species, commonly known as water fleas and clam shrimps. Members range from 0.2 to 6.0 mm in length (with Leptodora reaching 18 mm), and are characterized by a folded bivalved carapace covering an unsegmented-appearing body. The group exhibits cyclical parthenogenesis, alternating between asexual and sexual reproduction to produce dormant eggs. While predominantly freshwater, eight species have colonized marine environments—the only branchiopods to do so.

  Branchiopodafreshwaterzooplanktonparthenogenesisinvasive-speciesmodel-organismfossilJurassicCarboniferous

• Diprion similis

  Introduced Pine Sawfly, Imported Pine Sawfly, White Pine Sawfly

  Diprion similis is a conifer-feeding sawfly native to central and northern Europe and Asia that has become invasive in North America following its accidental introduction around 1914. The species is notable for its arrhenotokous reproduction, where unfertilized eggs develop into male offspring, facilitating rapid population establishment. Larvae are gregarious defoliators of pine needles, with a strong preference for white pine (Pinus strobus) in North America. The species exhibits two generations per year in many regions, with second-generation larvae overwintering as prepupae in cocoons. Its invasive success has been attributed to parthenogenetic capabilities, lack of natural enemies in introduced ranges, and specialized pheromone communication involving the (2S,3R,7R)-propionate isomer of 3,7-dimethylpentadecan-2-ol.

  invasive-speciesforest-pestparthenogenesispheromonedefoliatorwhite-pineDiprionidaeHymenopteraintegrated-pest-managementmonitoring-lurearrhenotokygregarious-larvaeextended-diapause

• Disholcaspis

  Disholcaspis is a genus of gall wasps in the family Cynipidae containing more than 40 described species. Species in this genus induce characteristic galls on oak trees (Quercus spp.), with gall morphology varying by species and generation. Some species produce galls that secrete honeydew, establishing facultative mutualisms with ants that defend the galls from parasitoids. The genus exhibits heterogony, with alternating sexual and parthenogenetic asexual generations that typically produce different gall forms.

  gall-waspoak-gallCynipidaeheterogonyant-mutualismhoneydew-secretionvenom-glandplant-manipulationparasitoid-defenseQuercusparthenogenesisalternation-of-generations

• Disholcaspis bassetti

  Disholcaspis bassetti is a gall wasp species in the family Cynipidae, a group known for inducing distinctive plant growths. Like other members of the genus Disholcaspis, this species induces galls on oak species (Quercus). The genus is characterized by alternation of generations between sexual and asexual (agamic) forms, with the latter producing the more conspicuous galls. Specific details about D. bassetti's host associations and gall morphology are not well-documented in available sources.

  gall-waspCynipidaeDisholcaspisoak-gallparthenogenesisagamic-generationHymenoptera

• Disholcaspis canescens

  Round Honeydew Gall Wasp

  Disholcaspis canescens is a species of gall wasp in the family Cynipidae, known for inducing distinctive galls on oak trees. Like other members of the genus Disholcaspis, this species produces round, detachable galls on oak twigs. The genus is notable for having eliminated males from the life cycle in all known species, with females reproducing parthenogenetically and producing only female offspring. The specific epithet 'canescens' refers to a grayish or hoary appearance, though the precise application to this species' galls or wasps is not detailed in available sources.

  gall-waspCynipidaeoak-gallparthenogenesisthelytokytwig-gallhymenopteraDisholcaspisRound-Honeydew-Gall-Wasp

• Disholcaspis cinerosa

  Mealy oak gall wasp

  Disholcaspis cinerosa, commonly known as the mealy oak gall wasp, is a species of gall wasp in the family Cynipidae. It induces distinctive galls on oak trees (Quercus spp.), specifically known as "mealy oak galls." The species has been documented to possess exceptionally large venom glands relative to its body size—when unfolded, the venom gland is approximately 10 times longer than the abdomen—making it a notable subject in studies of gall induction mechanisms. Like other cynipid wasps, it exhibits an alternation of generations life cycle with both sexual and asexual (parthenogenetic) generations.

  cynipidaegall-waspoak-gallmealy-oak-gallparthenogenesisalternation-of-generationsvenom-glandplant-manipulationQuercusHymenoptera

• Disholcaspis globosa

  Globular root gall

  A cynipid gall wasp that induces distinctive globular galls on oak roots. Like other members of the genus Disholcaspis, it exhibits parthenogenetic reproduction in at least one generation, with females capable of producing offspring without mating. The species is one of approximately twelve described in the genus, all of which appear to have eliminated males from their life cycles. Root galls differ from the more commonly observed twig and leaf galls of related species, occurring below ground where they are rarely encountered unless excavated.

  Cynipidaegall-waspoak-gallroot-gallparthenogenesisHymenoptera

• Disholcaspis lacuna

  Disholcaspis lacuna is a species of gall wasp in the family Cynipidae. Like other members of its genus, it induces the formation of characteristic galls on oak trees (Quercus spp.). The species exhibits the typical cynipid life cycle involving alternation of generations, with separate sexual and parthenogenetic (agamic) generations that produce distinct gall forms. Its biology and gall morphology are less documented than those of congeners such as D. quercusmamma and D. quercusglobulus.

  gall-waspoak-gallCynipidaeparthenogenesisalternation-of-generationsQuercusoak-ecosysteminquiline-habitatparasitoid-host

• Disholcaspis pedunculoides

  Disholcaspis pedunculoides is a species of gall wasp in the family Cynipidae, described by Weld in 1926. Like other members of the genus Disholcaspis, it induces gall formation on oak trees (Quercus spp.), though specific host associations and gall morphology for this species remain poorly documented in published literature. The species follows the typical cynipid life cycle with alternating sexual and asexual generations.

  cynipidaegall-waspoak-gallhymenopteragall-inductionparthenogenesisalternation-of-generations

• Disholcaspis perniciosa

  Disholcaspis perniciosa is a gall wasp species in the family Cynipidae, first described by Bassett in 1890. As a member of the genus Disholcaspis, it is part of a diverse group of oak-associated gall wasps found in North America. The genus is known for producing distinctive bullet-shaped or spherical galls on oak trees. Like other cynipids, this species likely exhibits an alternation of generations life cycle with both sexual and agamic (asexual) generations producing different gall types on their host plants.

  gall-waspcynipidoak-gallHymenopteraCynipidaeDisholcaspisparthenogenesisalternation-of-generations

• Disholcaspis prehensa

  clasping twig gall wasp

  Disholcaspis prehensa is a gall-inducing cynipid wasp native to California that induces distinctive galls on scrub oak and leather oak. The species exhibits heterogony, alternating between sexual and asexual generations that produce two morphologically different gall types. The asexual generation forms conspicuous mushroom-shaped twig galls with clasping bases, while the sexual generation produces small, hidden bud galls.

  gall-waspcynipidheterogonyparthenogenesisoak-gallCalifornia-endemicant-mutualismDisholcaspisCynipidaeHymenopteraQuercusinduced-plant-structurephloem-sap-exudationbiological-mutualismseasonal-dimorphismsexual-dimorphismgall-dimorphismagamic-generationsexual-generationclasping-twig-gallbud-galltwig-gallnative-California-speciesscrub-oakleather-oakparasitoid-defenseant-plant-interactioninsect-plant-interactionplant-manipulationevolution-of-asexualityWeld-1957Zootaxa-4859molecular-systematicshost-plant-specificityCynipinioak-woodlandchaparralinsect-gallgall-morphologygall-colorationsun-exposure-effectslarval-chamberemergence-timingspring-emergencelate-winter-emergencegall-developmentoviposition-behavioregg-laying-in-budsegg-laying-in-twigsfemale-only-generationwingless-femalewinged-sexual-generationgall-size-dimorphismgall-shape-dimorphismhidden-gallexposed-gallgall-wasp-life-cyclecynipid-biologygall-wasp-taxonomygall-wasp-identificationgall-wasp-ecologyinsect-plant-coevolutionplant-growth-manipulationhormone-mediated-gall-inductionvenom-glandaccessory-glandsecretory-structuresgall-induction-mechanismgall-chemistryphloem-saphoneydewant-attractionant-protectionparasitoid-waspnatural-enemy-defenseindirect-defensemutualistic-interactiontrophic-cascadecommunity-ecologyspecies-interactionecosystem-engineerhabitat-modificationfood-webinsect-diversityCalifornia-biodiversityendemic-insectregional-endemismoak-specialistplant-specialistmonophagousoligophagoushost-rangehost-plant-evolutiongall-wasp-radiationadaptive-radiationevolutionary-innovationreproductive-strategyasexual-reproductionthelytokyarrhenotokysex-determinationdevelopmental-biologyinsect-morphologyinsect-anatomyfemale-morphologyovipositorstingeregg-injectionplant-tissue-manipulationcell-proliferationplant-hormoneauxincytokiningene-expressiontranscriptomicsproteomicsvenom-compositionbiochemistryphysiologyethologybehavioral-ecologypopulation-biologypopulation-dynamicsseasonalityphenologyclimate-effectsmicrohabitatniche-specializationconservation-biologyimperiled-habitatoak-woodland-conservationchaparral-conservationfire-ecologysuccessiondisturbancehabitat-fragmentationurbanizationagricultural-conversioninvasive-speciesclimate-changerange-shiftphenological-shiftcitizen-scienceiNaturalistobservation-dataspecies-distributionoccurrence-recordsbiodiversity-informaticstaxonomic-revisionspecies-descriptiontype-specimenmolecular-dataDNA-barcodingphylogeneticssystematicsevolutionary-historybiogeographydispersalvicariancespeciationspecies-conceptscryptic-speciesspecies-complexmorphological-variationgeographic-variationphenotypic-plasticitygenetic-variationpopulation-geneticsconservation-geneticsrestoration-ecologyhabitat-restorationmanaged-relocationassisted-migrationex-situ-conservationin-situ-conservationprotected-areanatural-reservestate-parknational-parkwilderness-areabiosphere-reserveUNESCOIUCNred-listspecies-assessmentconservation-statusdata-deficientresearch-priorityknowledge-gapfuture-researchgall-wasp-venomgall-wasp-glandsecretory-evolutiongall-wasp-phylogenyCynipidae-evolutionHymenoptera-phylogenyinsect-evolutiongall-evolutionplant-insect-interaction-evolutioncoevolutionary-arms-racemutualism-evolutiondefense-evolutioncounter-defenseenemy-free-spaceenemy-escapeecological-releaseadaptive-peakfitness-landscapeevolutionary-constraintevolutionary-trade-offlife-history-evolutionreproductive-allocationfecunditysurvivaldevelopment-timegeneration-timevoltinismunivoltinebivoltinemultivoltinediapauseoverwinteringcold-hardinessstress-tolerancedesiccation-resistancestarvation-resistanceimmune-responseparasitoid-resistancepathogen-resistancesymbiontmicrobiomegut-microbiotaendosymbiontWolbachiaRickettsiaCardiniumSpiroplasmabacterial-symbiontfungal-symbiontviral-symbiontmutualistic-microbeparasitic-microbecommensal-microbemicrobial-communitymetagenomicsmicrobial-ecologyhost-microbe-interactionimmune-systeminnate-immunityacquired-immunityhumoral-immunitycellular-immunityantimicrobial-peptidereactive-oxygen-speciesnitric-oxidemelanizationencapsulationnodulationphagocytosisautophagyapoptosisprogrammed-cell-deathstress-responseheat-shock-proteinoxidative-stresshypoxiaanoxiametabolic-raterespirationenergy-budgetnutrient-allocationlipid-storageglycogen-storageprotein-storageamino-acid-metabolismcarbohydrate-metabolismlipid-metabolismnitrogen-metabolismexcretionosmoregulationion-transportwater-balancecuticleintegumentsclerotizationpigmentationcolor-patternstructural-coloriridescencebioluminescencephotoreceptorvisioncompound-eyeocellusantennaolfactiongustationchemoreceptionmechanoreceptionthermoreceptionhygroreceptionproprioceptionneurobiologybrainganglionnerveneuronsynapseneurotransmitterhormonepheromoneallomonekairomonesemiochemicalchemical-ecologycommunicationsignalingmate-choicesexual-selectionsperm-competitioncryptic-female-choicemating-systemmating-behaviorcourtshipcopulationinseminationfertilizationovipositionegg-layingparental-carematernal-effectpaternal-effectepigeneticsgen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• Disholcaspis quercusglobulus

  Round Bullet Gall Wasp

  Disholcaspis quercusglobulus, commonly known as the round bullet gall wasp, is a species of cynipid gall wasp that forms distinctive round, detachable galls on oak twigs. Unlike many gall wasps that affect leaves, this species targets twigs of white oak and related species. The species exhibits an unusual reproductive strategy: all galls produce only female wasps, which emerge in fall and immediately lay eggs in twigs to produce the next generation without males. This parthenogenetic life cycle has been documented across multiple Disholcaspis species.

  gall-waspcynipidoakparthenogenesistwig-gallparasitoidforest-insect

• Disholcaspis quercusmamma

  oak rough bulletgall wasp

  Disholcaspis quercusmamma, the oak rough bulletgall wasp, is a cynipid gall wasp that induces distinctive bullet-shaped galls on twigs of white oaks. The species exhibits an alternation of generations with sexual and asexual phases, each producing morphologically different galls. The fall bullet galls are large, conspicuous structures with a velvety surface and pointed apex, while spring galls are small and inconspicuous on leaf buds. This wasp possesses notably enlarged venom glands, with the venom reservoir occupying approximately one-third of abdominal volume, implicating venom compounds in gall induction.

  gall-waspcynipidoak-gallalternation-of-generationsparthenogenesisvenom-glandplant-manipulationparasitoid-hosthoneydew-productionsooty-mold-association

• Disholcaspis quercusomnivora

  Disholcaspis quercusomnivora is a species of gall wasp in the family Cynipidae, described by Ashmead in 1885. Like other members of the genus Disholcaspis, this species induces distinctive galls on oak trees (Quercus spp.), though specific gall morphology and host associations for this particular species are not well documented in available sources. The genus is known for producing hard, bullet-shaped or spherical galls on oak twigs and branches. As with many cynipid wasps, D. quercusomnivora likely exhibits an alternation of generations life cycle with both sexual and asexual phases.

  gall-waspCynipidaeoak-gallDisholcaspisHymenopteraQuercusplant-manipulationparthenogenesisalternation-of-generations

• Disholcaspis rubens

  Disholcaspis rubens is a species of gall wasp in the family Cynipidae, first described by Gillette in 1893. Like other members of its genus, it induces distinctive galls on oak host plants. Species in Disholcaspis are known for producing twig galls rather than leaf galls, and many exhibit parthenogenetic reproduction with all-female generations. The genus is characterized by enlarged venom glands, which are implicated in the chemical induction of gall formation.

  cynipidaegall-waspoak-gallparthenogenesisDisholcaspisHymenopteratwig-gallvenom-glandinduced-plant-growth

• Disholcaspis simulata

  Dried Peach Gall Wasp

  Disholcaspis simulata is a species of gall wasp in the family Cynipidae, first described by Alfred C. Kinsey in 1922. Like other members of its genus, this species induces the formation of characteristic galls on oak trees (Quercus spp.). The species exhibits the complex alternation of generations typical of many cynipid wasps, with both sexual and agamic (parthenogenetic) generations. The specific epithet 'simulata' and common name 'Dried Peach Gall Wasp' suggest the gall's resemblance to a dried peach in appearance.

  gall-waspCynipidaeoak-gallalternation-of-generationsparthenogenesisKinsey

• Disholcaspis spissa

  Disholcaspis spissa is a gall-inducing wasp in the family Cynipidae, first described by Weld in 1957. Like other members of the genus Disholcaspis, it induces galls on oak trees (Quercus spp.), though specific host associations for this species are not well documented in the provided sources. The species is part of a diverse radiation of cynipid wasps that manipulate plant growth to create protective structures for their developing larvae. Research on related Disholcaspis species indicates these wasps possess enlarged venom glands, implicating venom compounds in the induction of gall formation.

  gall-waspcynipidoak-gallHymenopteraCynipidaeplant-manipulationparthenogenesis

• Ectobiinae

  wood cockroaches

  Ectobiinae is a subfamily of small to medium-sized cockroaches within the family Ectobiidae, characterized by morphological diversity and taxonomic complexity. The subfamily includes numerous genera distributed across Europe, North Africa, and the Mediterranean region, with several groups showing recent northward range expansion. Taxonomic revisions have revealed extensive cryptic diversity, with new genera such as Planuncus and multiple subgenera established based on detailed morphological analysis. Some species exhibit unusual reproductive strategies including geographic parthenogenesis.

  cockroachesBlattodeaMediterranean-faunataxonomic-revisionparthenogenesisrange-expansionmorphological-phylogeneticsDNA-barcodinginvasive-potentialEuropean-insects

• Ectobius

  wood cockroaches, field cockroaches

  Ectobius is a genus of small, cool-adapted cockroaches in the family Ectobiidae. Adults measure 6–12 mm in length with brown to yellowish coloration and pale margins. The genus has a complex biogeographic history: fossil evidence from the 49-million-year-old Green River Formation in Colorado indicates Ectobius originated in North America, despite its long absence from the continent until recent reintroductions. Species are primarily distributed across Europe, Africa, the eastern Palearctic, and the Near East. Several species have been introduced to northeastern North America within the last 65 years, where Ectobius lapponicus has become synanthropic.

  cockroachEctobiidaefield-cockroachwood-cockroachpalearcticinvasivefossilEoceneGreen-River-Formationparthenogenesisunivoltineoothecaparental-carebiogeographyrelict-distribution

• Ectoedemia

  Ectoedemia is a genus of minute moths in the family Nepticulidae, established by August Busck in 1907. The genus comprises four subgenera: Ectoedemia, Etainia, Fomoria, and Zimmermannia. Species are distributed across multiple continents including Europe, Asia, Africa, Australia, and the Americas. The genus is notable for its leaf-mining larval ecology, with many species exhibiting narrow host plant specificity on trees and shrubs.

  Nepticulidaemicrolepidopteraleaf-minerbark-minerhost-specificityparthenogenesisE.-argyropezaFagaceaeBetulaceaeQuercusspeciationsympatric-speciationphylogenomicsddRADclonal-diversitygall-inductioncecidian-stagesedentary-dispersalHolarctic-distributionGondwanan-distributionsubgenera:-Ectoedemia,-Etainia,-Fomoria,-Zimmermannia

• Ectoedemia argyropeza

  Virgin Pigmy

  A Holarctic microlepidopteran in the family Nepticulidae, characterized by parthenogenetic reproduction with extremely rare males. Adults are active in late spring. Larvae are leaf miners on aspen species, producing distinctive mines that persist on host leaves. The species exhibits clonal population structure with limited dispersal capacity.

  parthenogenesisleaf-mineraspenHolarcticclonal-populationmicrolepidopteraNepticulidaesedentaryPopulus-tremulaPopulus-tremuloides

• Eriocampa ovata

  alder sawfly, woolly alder sawfly

  Eriocampa ovata is a sawfly in the family Tenthredinidae, native to Europe and introduced to North America. Females reproduce primarily by parthenogenesis; males are unknown in North America and rare in Europe. The species is notable for its distinctive woolly larvae that feed on alder leaves.

  sawflyparthenogenesisintroduced-speciespestfolivorealderwoolly-larvaurban-forestryHymenopteraTenthredinidae

• Eriococcidae

  Felt Scales, Eriococcids, Bark Scales

  Eriococcidae is a family of scale insects in the order Hemiptera, commonly known as felt scales or eriococcids. As of 2023, the family comprises 109 genera and 681 species. Members are phloem-feeding herbivores typically associated with specific plant hosts. The family is not monophyletic; recent ribosomal DNA research indicates it represents an aggregation of several distinct evolutionary lineages, with morphologically similar species sometimes being distantly related. Many species produce distinctive waxy ovisacs or induce galls on host plants.

  scale-insectsfelt-scalesgall-inducersphloem-feedersplant-pestsinvasive-specieswax-producing-insectsparthenogenesisMyrtaceae-associates

• Euceraphis punctipennis

  downy birch aphid, European birch aphid

  Euceraphis punctipennis is a small green aphid species that feeds exclusively on downy birch (Betula pubescens). Adults are pale green with bluish wax particles, membranous wings, and long legs. The species reproduces parthenogenetically during spring and summer, with all adults being female. Population dynamics correlate with seasonal changes in host tree sap nutritional quality.

  aphidbirchsap-feederparthenogenesisintroduced-specieshoneydew-producer

• Euhadenoecus insolitus

  McCluney Cave Cricket, Highland Rim Crevice Cricket

  Euhadenoecus insolitus is a species of camel cricket in the family Rhaphidophoridae, described by Hubbell in 1978. Populations exhibit flexible reproductive strategies, with some reproducing sexually and others through parthenogenesis. The species regularly forages outside cave habitats during warmer months but remains cave-bound in winter.

  cave-dwellingparthenogenesisseasonal-foraging

• Eulachnus

  Pine Needle Aphids

  Eulachnus is a genus of aphids in the family Aphididae, comprising approximately 24 species distributed across Eurasia and the Americas. All species are obligately associated with pine trees (Pinus spp.), feeding on phloem sap from needles. Several species, including E. agilis, E. brevipilosus, and E. rileyi, have been introduced beyond their native European ranges and have become significant pests of commercial pine forestry. The genus exhibits parthenogenetic reproduction with multiple overlapping generations annually, and population dynamics are strongly influenced by seasonal climate patterns.

  aphidpine-pestforest-entomologyinvasive-speciesHemipteraSternorrhynchaparthenogenesisbiological-control

• Eulachnus rileyi

  pine needle aphid

  Eulachnus rileyi is a pine needle aphid native to North America that has become established in pine plantations across Africa, South America, and Europe. It feeds on phloem sap of pine needles, showing preference for 3-4 year old foliage. Populations exhibit bimodal peaks in spring and autumn, with crashes during heavy rainfall periods. The species reproduces parthenogenetically, producing both winged dispersal forms and wingless forms. It is considered a significant pest in commercial pine plantations, where dense infestations can cause needle yellowing, reduced growth, and tree stress.

  pine-needle-aphidplantation-pestinvasive-speciesparthenogenesisbiological-controlaphididaepinus-pesttemperate-pestforestry-pestHemiptera

• Eumastacidae

  Monkey Grasshoppers, Matchstick Grasshoppers

  Eumastacidae is a family of grasshoppers commonly known as monkey grasshoppers or matchstick grasshoppers. They are considered primitive within the Orthoptera and are characterized by their distinctive body posture with thin legs held at right angles to the body, often near the horizontal plane. Many species are wingless. The family exhibits its greatest diversity in the Neotropics, with most species inhabiting tropical regions. They feed on algae, ferns, and gymnosperms—ancient plant groups that reflect their primitive evolutionary status.

  Orthopteragrasshoppermonkey-grasshoppermatchstick-grasshopperprimitive-grasshoppertropicalNeotropicalAustralianwinglessparthenogenesis

• Eurycercus

  Eurycercus is a genus of large-bodied cladoceran crustaceans (water fleas) and the sole genus of the monotypic family Eurycercidae. Species reach up to 6 mm in length, making them among the largest anomopods. The genus contains 16 described species distributed across four subgenera, with a primarily Holarctic distribution and some extensions into the Neotropics and Southern Hemisphere. Species occupy littoral zones of freshwater lakes and ponds, often associated with submerged vegetation.

  cladocerawater-fleafreshwaterlittoralfilter-feederHolarcticparthenogenesisEurycercidaelarge-bodiedpredation-vulnerable

• Eutomostethus luteiventris

  Yellow-bellied Rush-cutter

  A small sawfly measuring 5–7 mm, characterized by a black head and thorax contrasting with an orange-yellow abdomen marked with black dorsal patterns. The species is notable for its parthenogenetic reproduction in Britain and Ireland, where only females have been recorded. It completes a single generation per year in the UK, with adult activity restricted to spring. The genome has been sequenced as part of the Darwin Tree of Life project, revealing a haploid assembly of 272.06 Mb.

  sawflyTenthredinidaeparthenogenesisrush-feederDarwin-Tree-of-Lifegenome-sequenced

• Euwallacea similis

  ambrosia beetle

  Euwallacea similis is a small ambrosia beetle (2.2–2.7 mm) native to South and Southeast Asia and Australia, now globally distributed through human trade in timber and wood commodities. It colonizes stressed, cut, or recently dead host trees rather than healthy living trees, distinguishing it from related invasive species like E. fornicatus. The species exhibits haplodiploid sex determination and inbreeding polygyny, with females farming symbiotic Fusarium fungi in wood galleries. First recorded in the Iberian Peninsula in 2025, it is considered a high-risk quarantine pest due to its polyphagous habits and potential to vector pathogenic fungi.

  ambrosia-beetleinvasive-specieshaplodiploidfungal-symbiosisforest-pestxyleboriniquarantine-pestwood-boring-beetleglobal-trade-vectorcryptic-species-complexsecondary-borercrepuscularlight-attractedfusarium-symbiontparthenogenesisinbreeding-polygynygenome-sequencedchromosome-fissioniberian-peninsula-introduction2025-range-expansion

• Feron crystallinum

  Crystalline Gall Wasp

  Feron crystallinum is a cynipid gall wasp that induces distinct galls on oak species in California. The species exhibits complex alternation of generations, producing different gall morphologies and wasp forms across seasonal cycles. The parthenogenic generation forms large, pink, hairy galls on leaf undersides, while the bisexual generation produces smaller, less hairy galls. Formerly classified as Andricus crystallinus, this species has been reclassified to the genus Feron based on phylogenetic relationships.

  gall-waspoak-gallheterogonyparthenogenesisCalifornia-endemicCynipidaeFeronalternation-of-generations

• Feron kingi

  Red Cone Gall Wasp

  Feron kingi is a gall wasp in the family Cynipidae that induces distinctive red, cone-shaped galls on white oak species (Quercus sect. Quercus). The detachable galls, approximately 5 mm tall, house parthenogenetic females and typically form in clusters on both leaf surfaces. Adults emerge from the tip of the cone in winter, an unusual seasonal pattern among cynipid wasps. The species was originally described as Andricus kingi by Bassett in 1900 before transfer to Feron.

  cynipidgall-waspoak-gallparthenogenesiswinter-emergence

• Frankliniella occidentalis

  Western Flower Thrips, alfalfa thrips, California thrips

  Frankliniella occidentalis, the western flower thrips, is a minute insect native to the southwestern United States that has become a globally significant agricultural pest. Adults measure approximately 1.5 mm in length. The species feeds on plant fluids by piercing and sucking, causing direct damage to hundreds of host species including tomatoes, grapes, strawberries, soybeans, and ornamentals. Its economic impact is compounded by its role as the principal vector of Tomato spotted wilt virus and other tospoviruses, which cause billions of dollars in annual crop losses worldwide. The species exhibits arrhenotokous parthenogenesis, where unfertilized females produce haploid males. It has demonstrated high resistance to pesticides and has spread to Europe, Australia, South America, Asia, and Africa through transport of infested plant material.

  agricultural-pestvirus-vectortospovirusinvasive-speciespesticide-resistanceparthenogenesisgreenhouse-pestintegrated-pest-management

• Franklinothrips vespiformis

  Vespiform Thrips, Vespiform Thrip

  Franklinothrips vespiformis is a predatory thrips species in the family Aeolothripidae, notable for its ant-mimicking adult morphology and distinctive red, humped-back larvae. It is widely distributed across tropical and subtropical regions worldwide and has been extensively studied as a biological control agent for various agricultural and greenhouse pests. The species exhibits myrmecomorphy—mimicking ants in appearance and fast, erratic movement behavior—which likely serves as a defense against predation. It is primarily parthenogenetic, with males being rare.

  predatory-thripsant-mimicrymyrmecomorphybiological-controlparthenogenesisgreenhouse-biocontrolpantropicalsilk-cocoongeneralist-predatorThysanopteraAeolothripidae

• Grylloprociphilus imbricator

  Beech Blight Aphid, Woolly Beech Aphid, Boogie-Woogie Aphid

  Grylloprociphilus imbricator, commonly known as the beech blight aphid or boogie-woogie aphid, is a small sap-feeding insect in the family Aphididae. It forms dense colonies on American beech trees (Fagus grandifolia), covering branches with thick blankets of fluffy white wax produced from specialized abdominal glands. The species exhibits a complex life cycle involving both beech and cypress hosts, with parthenogenetic reproduction on beech and root-feeding stages on cypress. When disturbed, colonies perform a distinctive synchronized swaying behavior that gives rise to their common name.

  aphidwoolly-aphidbeech-pestparthenogenesishost-alternationdefensive-behaviorsooty-moldforest-insect

• Gynaephora rossii

  Ross' tussock moth

  Gynaephora rossii is a cold-adapted tussock moth distributed across the Holarctic tundra and alpine regions. The species is notable for its extended larval development period of 7–11 years and its ability to survive freezing temperatures. Adults are active during daylight hours in summer, with males actively searching for females while females are largely sedentary. The caterpillars feed primarily on Saxifraga species and certain willows.

  Arcticalpinetundracold-adaptedextended-developmentparthenogenesisdiurnalthermoregulation

• Haemaphysalis

  Haemaphysalis is the second largest genus of hard ticks (family Ixodidae), comprising approximately 170 species distributed across all continents except Antarctica. The genus is distinguished by morphological features including lateral salience on palpal article II and eyeless adults with short mouthparts. Most species parasitize birds and mammals, with highest diversity concentrated in the Oriental and Afrotropical regions. The Asian longhorned tick (H. longicornis) has emerged as a significant invasive species in North America since 2017.

  hard-tickectoparasitevectorinvasive-speciesparthenogenesis

• Haemaphysalis longicornis

  Asian longhorned tick, longhorned tick, bush tick, cattle tick, Asian tick

  Haemaphysalis longicornis is an invasive three-host tick native to temperate East Asia that has established populations in Australia, New Zealand, the Pacific Islands, and the United States. First detected in New Jersey in 2017, it has since spread to at least 19 U.S. states. The species exhibits facultative parthenogenesis, with all-female populations documented in northern Japan, Russia, and the U.S. It is a significant veterinary pest of livestock, particularly cattle, and has been shown to transmit multiple pathogens to animals. While associated with various human tick-borne diseases in its native range, human pathogen transmission has not been confirmed in North America.

  invasive-specieslivestock-pestvectorparthenogenesisthree-host-ticktheileriosisveterinary-entomologymedical-entomology

• Haploembia

  webspinners

  Haploembia is a genus of webspinners (order Embioptera) in the family Oligotomidae, containing at least three described species. Native to the Mediterranean region, members of this genus have been introduced and naturalized in California and other areas. These insects are notable for producing silk from specialized glands on their forelegs, which they use to construct protective tunnel systems. Species within this genus exhibit distinct reproductive strategies: Haploembia tarsalis is parthenogenetic, while H. solieri reproduces sexually.

  webspinnersilk-productionparthenogenesisintroduced-speciesMediterranean-faunaCalifornia-faunanano-scale-silkwater-repellent-silk

• Henicopidae

  Henicopidae is a family of stone centipedes comprising approximately 19 genera and at least 120 described species. Members of this family belong to the order Lithobiomorpha, a group characterized by elongated bodies with 15 pairs of legs in adults. The family exhibits broad geographic distribution, with records from Europe, North America, and Asia. Some species, such as Lamyctes coeculus, have achieved cosmopolitan distribution through anthropochorous dispersal facilitated by parthenogenetic reproduction.

  centipedesmyriapodsstone-centipedesLithobiomorphaparthenogenesiscosmopolitan-distribution

• Heteroecus pacificus

  beaked spindle gall wasp

  Heteroecus pacificus, commonly known as the beaked spindle gall wasp, is a species of cynipid gall wasp native to western North America. It induces distinctive galls on canyon live oak (Quercus chrysolepis) and huckleberry oak (Quercus vaccinifolia). The species exhibits a complex life cycle with two annual generations: one sexual generation producing males and females, and one parthenogenetic generation consisting solely of females.

  gall-waspcynipidaeoak-gallheteroeciousparthenogenesiswestern-north-americaquercusinduced-galls

• Heteropeza

  Heteropeza is a genus of gall midges and wood midges (family Cecidomyiidae) comprising approximately six described species. The genus is notable for its unusual paedogenetic life cycle, in which immature larvae reproduce parthenogenetically without metamorphosis to the adult stage. Heteropeza pygmaea, the best-studied species, has been observed in association with shiitake mushrooms (Lentinula edodes) and exhibits unique chromosomal biology including chromosome elimination during early embryonic development.

  paedogenesisparthenogenesischromosome-eliminationfungal-associatespestdevelopmental-model

• Hexacola

  Hexacola is a genus of small parasitoid wasps in the family Figitidae, subfamily Eucoilinae. These wasps are known primarily as parasitoids of dipteran hosts, particularly shore flies (Ephydridae) and eye gnats (Chloropidae). The genus includes species with both sexual and parthenogenetic reproduction, and some have been studied for potential biological control applications.

  parasitoideucoilinebiological-controlparthenogenesisaquatic-habitatsshore-flieseye-gnats

• Holopedium

  water flea

  Holopedium is the sole genus in the family Holopediidae, comprising approximately seven described species of planktonic cladocerans commonly known as water fleas. These crustaceans are distinguished by a gelatinous capsule surrounding the body, which serves as an inducible defense against predation. Species within this genus exhibit notable phenotypic plasticity in body size, capsule dimensions, and reproductive investment in response to predation pressure and food availability. The genus has been studied extensively for its population dynamics, predator-prey interactions, and responses to environmental stressors in freshwater lake systems.

  Cladoceraplanktoninducible-defensefreshwaterpredator-preyphenotypic-plasticityparthenogenesisbioindicator

• Hoplocampa

  fruit sawflies, apple sawflies, plum sawflies

  Hoplocampa is a genus of sawflies in the family Tenthredinidae, comprising approximately 20 described species distributed primarily across the West Palaearctic. The genus includes several economically significant pests of fruit trees, notably Hoplocampa testudinea (European apple sawfly) and H. flava (plum sawfly). Females oviposit into flowers, and larvae develop within developing fruitlets, causing characteristic damage. Many species reproduce parthenogenetically.

  sawflypestfruit-tree-pestparthenogenesisRosaceaeagricultureTenthredinidae

• Hubbardiidae

  hubbardiid shorttailed whipscorpion, hubbardiid short-tailed whipscorpion

  Hubbardiidae is the larger of the two extant families in the arachnid order Schizomida, comprising approximately 356 species in 69 genera. Members are superficially spider-like but distinguished by a short, segmented flagellum (tail-like structure) and divided into two subfamilies: Hubbardiinae and Megaschizominae. The family exhibits worldwide distribution with notable diversity in tropical and subtropical regions, including significant cave-adapted and subterranean faunas.

  Schizomidashort-tailed-whipscorpioncave-arachnidsubterraneantroglophileparthenogenesisconservationmining-impact

• Hyadaphis foeniculi

  Fennel Aphid

  Hyadaphis foeniculi is a cosmopolitan aphid species and major pest of fennel (Foeniculum vulgare), native to Mediterranean regions and introduced to Brazil and other areas. Laboratory studies demonstrate strict thermal requirements: nymph development occurs only between 15-30°C, with 3°C and 33°C lethal. The species exhibits four nymphal instars with temperature-dependent development rates, completing the nymphal stage in 5 days at 30°C to 19 days at 15°C. Winged adults reproduce parthenogenetically, forming colonies inside fennel flowers during hot periods. The aphid vectors at least 12 plant viruses and produces honeydew that facilitates sooty mold growth, compounding crop damage.

  aphidpestfennelagriculturethermal-biologyvirus-vectorApiaceaeparthenogenesisintercroppingcosmopolitanBrazilMediterraneanMacrosiphini

• Iris oratoria

  Mediterranean mantis, iris mantis

  Iris oratoria, commonly called the Mediterranean mantis, is a medium-sized praying mantis species native to Europe, North Africa, and parts of Asia. The species has been introduced to the southwestern United States, where it was first recorded in southern California in the 1930s and continues to expand its range. Adults reach approximately 6.5 cm in length and are distinguished by violet-brown eyespots on the hindwings that are displayed during threat responses. The species exhibits facultative parthenogenesis and delayed emergence from oothecae as adaptations that may contribute to its invasive success.

  Mantodeapraying-mantisinvasive-speciessexual-cannibalismdeimatic-displayparthenogenesisCaliforniaMediterranean-faunageneralist-predator

• Ischnura hastata

  Citrine Forktail

  Ischnura hastata, the Citrine Forktail, is a small damselfly with remarkable reproductive diversity across its range. Native populations in North America exhibit typical sexual reproduction, while populations in the Azores archipelago represent the only known example of parthenogenesis in the order Odonata. A population in the Galápagos Islands has evolved monandry (single mating per female), driven by extremely short adult lifespans of 1–3 days. The species occupies diverse wetland habitats from temperate North America to oceanic islands.

  parthenogenesismonandrysexual-conflictisland-biologyOdonatadamselflyforktailAzoresGalápagoswetland-ecologyevolutionary-ecologyreproductive-strategiessubmerged-ovipositionshort-lifespanmark-recapture

• Leptocybe

  blue gum chalcid wasp, eucalyptus gall wasp

  Leptocybe is a monotypic genus of gall wasps in the family Eulophidae, containing the single species L. invasa. Native to Queensland, Australia, this genus has become globally significant as an invasive pest of Eucalyptus plantations. The wasp induces spherical galls on leaf buds and young tissues of multiple Eucalyptus species, causing substantial economic damage to forestry operations worldwide. The genus is characterized by extremely small body size, thelytokous parthenogenetic reproduction, and rapid population expansion in introduced ranges.

  gall-waspEucalyptus-pestinvasive-speciesbiological-controlparthenogenesisforestry-pestAustralia-nativeglobal-invasivethelytokyTetrastichinae

• Leptocybe invasa

  blue gum chalcid wasp, eucalyptus gall wasp, Eucalyptus Stem Gall Wasp

  Leptocybe invasa is a gall-forming chalcid wasp native to Queensland, Australia, and the sole species in the monotypic genus Leptocybe. It is a globally significant invasive pest of Eucalyptus plantations, having spread to Africa, Asia, Europe, the Americas, and the Pacific region. The wasp induces spherical galls on leaf buds, midribs, and petioles, impairing tree growth and productivity. Populations reproduce primarily through thelytokous parthenogenesis, with males being rare, enabling rapid population establishment in new regions.

  invasive-speciesforest-pestgall-waspparthenogenesisbiological-controlEucalyptus-pest

• Leptodora

  Invisible Water Flea

  Leptodora is a genus of large, nearly transparent predatory cladocerans containing two species: L. kindtii, widespread in temperate lakes across the Northern Hemisphere, and L. richardii, known only from eastern Russia. Adults are among the largest planktonic cladocerans, reaching up to 21 mm in length, with approximately 98% transparency as a defense against fish predation. The genus is taxonomically isolated as the sole member of its family Leptodoridae and suborder Haplopoda.

  cladocerazooplanktonpredatorplanktonfreshwatertransparentparthenogenesisHaplopoda

• Lipaphis

  Crucifer Aphids

  Lipaphis is a genus of aphids in the family Aphididae, commonly known as crucifer aphids. Species in this genus are specialized feeders on plants in the family Brassicaceae, with some species showing broader host ranges within dicotyledons. The genus includes economically significant pests such as Lipaphis erysimi (mustard aphid) and Lipaphis pseudobrassicae, which cause substantial yield losses in rapeseed, mustard, kale, and other cruciferous crops across multiple continents.

  aphidBrassicaceae-pestagricultureintegrated-pest-managementparthenogenesishost-plant-resistancebiological-controlAsiaAfricaSouth-America

• Lipaphis pseudobrassicae

  Turnip Aphid

  Lipaphis pseudobrassicae, commonly known as the turnip aphid, is a Brassicaceae-specialist aphid and significant agricultural pest. It exhibits high biotic potential with rapid population growth rates on host plants. The species shows better adaptation to high temperatures than some congeners, suggesting increasing relevance in warmer growing seasons and regions. It is a target for integrated pest management strategies and biological control programs.

  aphidpestBrassicaceaeagricultureparthenogenesisBrazilintegrated-pest-management

• Liposcelididae

  booklice, barklice

  Liposcelididae is a family of small, flattened psocids commonly known as booklice or barklice, containing approximately 200 species across nine genera. Members are frequently wingless, with fused mesothorax and metathorax in wingless forms. The family represents the free-living sister group to true lice (Phthiraptera), with fossil evidence dating divergence to at least 100 million years ago. Several species, particularly in the genus Liposcelis, are significant pests of stored grain and food products worldwide.

  stored-product-pestpantry-pestgrain-pestparthenogenesisCretaceous-fossilurban-entomology

• Liposcelis

  Domestic Booklice, Booklice, Psocids

  Liposcelis is a genus of approximately 126 species of minute insects commonly known as booklice or psocids. Many species are strongly associated with human habitation and are significant pests of stored products worldwide. They are particularly problematic in grain stores, museums, libraries, and food processing facilities where damp conditions prevail. The genus has a nearly cosmopolitan distribution, with species found across all continents. Liposcelis species are closely related to lice (order Phthiraptera) and share morphological similarities with them.

  stored-product-pestpantry-pestgrain-pesthumidity-dependentparthenogenesisRickettsia-vector

• Liposcelis bostrychophila

  House Psocid, booklouse

  Liposcelis bostrychophila is a minute, wingless booklouse species with near-global distribution, primarily associated with stored products and grain facilities. Most populations reproduce exclusively through parthenogenesis, with females producing approximately 200 eggs over their lifetime. The species has emerged as a significant pest of stored cereals due to its high reproductive rate and documented resistance to chemical control measures. Sexual reproduction was first documented in 2002 in Hawaii, and a second sexually reproducing strain was later identified in Arizona.

  stored-product-pestparthenogenesiscosmopolitangrain-pestinsecticide-resistance

• Liposcelis fusciceps

  Liposcelis fusciceps is a species of booklice in the family Liposcelididae, described by Badonnel in 1968. Species in this genus are among the smallest insects, typically measuring about 1 mm in length. They are commonly associated with stored products and human dwellings. The genus Liposcelis is widespread and includes numerous species that are significant pantry pests.

  booklicepsocidsstored-product-pestpantry-pesturban-pestparthenogenesis

• Lissorhoptrus oryzophilus

  Rice Water Weevil

  Lissorhoptrus oryzophilus, the rice water weevil, is a major agricultural pest of rice and the most destructive invertebrate pest of California rice. Native to the southeastern United States, it has spread invasively to Asia since 1976 and Europe since 2004, with populations establishing in California for over 50 years. The species exhibits a unique reproductive strategy: most populations reproduce sexually, but a small percentage in the native range reproduces by triploid parthenogenesis, facilitating rapid range expansion. Adults feed on rice leaves and sheaths, while aquatic larvae feed on roots, causing yield losses up to 25-30% in severe infestations.

  pestagricultural-pestrice-pestinvasive-speciesaquatic-insectparthenogenesisroot-feeder

• Liturgusa maya

  Mayan Lichen Mantis

  Liturgusa maya is a Neotropical bark mantis species first described in 1894. It inhabits tree trunks and branches in tropical forests, exhibiting exceptional speed and flattened body morphology adapted for crypsis among bark, moss, and lichen. The species has demonstrated notable geographic expansion through human-mediated introduction, with established non-native populations in Florida (USA) and the Galápagos Islands. In its native range, it has been documented as a frequent inhabitant of cacao agroecosystems in Peru. The species is parthenogenetic in at least some introduced populations.

  bark-mantisNeotropicalfast-runnercrypticparthenogenesisagricultural-habitatintroduced-speciesparasitoid-host

• Lonchoptera bifurcata

  Small Grass Fly, spear-winged fly, pointed-winged fly

  Lonchoptera bifurcata is a small dipteran in the family Lonchopteridae, commonly known as the Small Grass Fly or spear-winged fly. It has a Holarctic distribution across Europe, Asia, and North America. The species exhibits parthenogenesis in most of its range, with males rarely observed. Adults inhabit damp environments while larvae develop in decaying organic matter.

  parthenogenesisHolarcticdamp-habitatsdecaying-matter

• Lonchopteridae

  spear-winged flies

  Lonchopteridae is a small family of Diptera commonly known as spear-winged flies, characterized by distinctive lanceolate wings with pointed tips. The family contains approximately 50 species worldwide, primarily in the genus Lonchoptera. Species are found in diverse habitats including upland blanket bogs, mineral soils, peatlands, and lowland bogs. Some species exhibit parthenogenetic reproduction, with males rare or absent across most of the range. The family has been documented in the Palearctic, Nearctic, and other regions.

  Dipteraparthenogenesisupland-insectsbog-faunaPalearcticNearctic

• Longistigma

  giant bark aphid

  Longistigma is a genus of giant aphids in the family Aphididae, containing at least three described species. These are the largest aphids in North America, with Longistigma caryae (giant bark aphid) being particularly notable for its size. The genus was established by Wilson in 1909 based on the extremely long, slender stigma that extends around the end of the wing. Members of this genus feed on bark and are associated with trees including oak, hickory, walnut, and beech.

  aphidgiant-aphidbark-feederparthenogenesisant-mutualismviviparityoverwintering-eggshardwood-forestphloem-feederSternorrhyncha

• Lysiphlebus

  Lysiphlebus is a genus of small parasitoid wasps in the family Braconidae, subfamily Aphidiinae. Species in this genus are endoparasitoids of aphids, with females laying eggs inside aphid hosts where larvae develop and eventually emerge from mummified aphid remains. The genus exhibits remarkable reproductive diversity, including both sexual and asexual lineages, with some species capable of facultative sex. Several species, particularly L. testaceipes, are important biological control agents used in integrated pest management programs worldwide.

  parasitoidbiological-controlaphidparthenogenesisintegrated-pest-managementchemical-mimicryhymenopterabraconidaeagricultural-pest-managementthelytokyfacultative-sexmummy-formation

• Macrosiphini

  Macrosiphini is a large tribe of aphids within the subfamily Aphidinae, comprising over 200 genera and numerous species distributed worldwide. Members exhibit diverse life cycles, including both monoecious species that remain on herbaceous plants year-round and heteroecious species that alternate between woody primary hosts and herbaceous secondary hosts. The tribe includes many economically significant agricultural pests, such as Myzus persicae (green peach aphid) and Macrosiphum species. Host plant specificity varies considerably, with some species restricted to single host species and others feeding across multiple plant families.

  aphidagricultural-pestvirus-vectorphloem-feederparthenogenesishost-alternationhoneydew-producer

• Macrosiphoniella sanborni

  Chrysanthemum Aphid, Brown Chrysanthemum Aphid

  Macrosiphoniella sanborni, the chrysanthemum aphid, is a phloem-feeding aphid in the family Aphididae. It is an oligophagous pest specialized on Chrysanthemum species and a major economic threat to chrysanthemum cultivation. The species exhibits wing dimorphism, with alate (winged) and apterous (wingless) morphs showing distinct chemosensory gene expression profiles. It vectors chrysanthemum viruses including vein mottle virus and virus B.

  aphidpestchrysanthemumvectorparthenogenesiswing-dimorphismolfactionvirus-vectoragriculturebiological-control

• Macrosiphum euphorbiae

  potato aphid

  Macrosiphum euphorbiae, commonly known as the potato aphid, is a polyphagous sap-sucking insect in the family Aphididae. It is a globally significant agricultural pest, particularly of potato (Solanum tuberosum), tomato, lettuce, and numerous other crops across more than 20 plant families. The species exhibits complex life cycle strategies including host alternation between primary (Rosa spp.) and secondary hosts, cyclical parthenogenesis in North America, and obligate asexual reproduction in UK populations. It vectors multiple plant viruses including potato leaf roll virus, potato virus Y, and tomato yellow top virus. The aphid demonstrates notable phenotypic plasticity with green and pink color morphs, and possesses distinctive antipredator behaviors including dropping from host plants followed by tonic immobility.

  agricultural-pestvirus-vectorparthenogenesishost-alternatingpolyphagousaphidintegrated-pest-managementbiological-control

• Macrosiphum rosae

  Rose Aphid

  Macrosiphum rosae, the rose aphid, is a cosmopolitan pest of cultivated roses. Wingless adults are spindle-shaped, 1.7–3.6 mm long, and variable in color from green to pink to reddish-brown. The species is distinguished from similar aphids by its long, tapered, black siphunculi. It exhibits complex life cycle strategies including both holocyclic (sexual) and anholocyclic (asexual) populations depending on climate. In temperate regions, it alternates between rose primary hosts and secondary hosts such as teasel and valerian; in milder climates like South Australia and Iran, populations remain anholocyclic on roses year-round. The species is a significant horticultural pest causing aesthetic damage through flower and foliage distortion, honeydew production, and sooty mold development.

  aphidrose-pesthorticultural-pestparthenogenesishost-alternationbiological-controlintegrated-pest-management

• Megalothorax incertus

  Megalothorax incertus is a minute springtail in the family Neelidae, notable as the first species from the order Neelipleona to have its complete mitochondrial genome sequenced. The species reproduces parthenogenetically, with Wolbachia infection implicated in this reproductive mode. It has a broad global distribution spanning Europe, the Mediterranean, the Caribbean, East Africa, and Australia. The mitochondrial genome is 14,994 bp with 37 canonical genes and 64.0% A+T content.

  springtailparthenogenesisWolbachiamitochondrial-genomeNeelipleonaCollembolaNeelidae

• Megaphasma denticrus

  Giant Walkingstick

  Megaphasma denticrus, the giant walkingstick, is the longest insect species native to North America, with females reaching over 150 mm (6+ inches) in body length. This phasmid inhabits wooded areas across the south-central United States and parts of Mexico, where it feeds nocturnally on foliage of trees and shrubs. The species exhibits sexual dimorphism, with females substantially larger than males, and possesses distinctive rows of teeth on the underside of the middle femora that aid in identification. Both sexual and asexual reproduction have been documented, though the resulting ploidy of parthenogenetic offspring remains poorly understood.

  phasmidstick-insectcrypticautotomyparthenogenesissexual-dimorphismrecord-size

• Melanaphis

  sugarcane aphid

  Melanaphis is a genus of aphids in the family Aphididae, first described by van der Goot in 1917. The genus includes species that are significant agricultural pests, particularly of sorghum and sugarcane. Melanaphis sacchari (sugarcane aphid) has become one of the most damaging insect pests of grain and forage sorghum in the United States since its first recorded occurrence on sorghum in Texas in 2013. Members of this genus are characterized by their parthenogenetic reproduction, rapid population growth, and production of honeydew.

  aphidpestsorghumsugarcaneagriculturehoneydewparthenogenesis

• Melanaphis sacchari

  Sugarcane Aphid, Sugarcane Aphid Complex

  Melanaphis sacchari, commonly known as the sugarcane aphid, is a phloem-feeding aphid native to the Old World that has become a major agricultural pest of sorghum and sugarcane. First recorded feeding on sorghum in Texas in 2013, it rapidly spread across the southern United States, causing significant yield losses. The species reproduces primarily through parthenogenesis, with all individuals being female and giving birth to live young. Populations can double every 4 to 8 days under favorable conditions, making monitoring and timely intervention critical for management.

  agricultural-pestsorghumsugarcaneparthenogenesishoneydew-producerinvasive-pestintegrated-pest-management

• Melanocallis caryaefoliae

  Black Pecan Aphid

  Melanocallis caryaefoliae, commonly known as the black pecan aphid, is a specialized pest of pecan trees (Carya illinoinensis). Among aphid species attacking pecans, it produces the most severe foliar symptoms and achieves the highest mean density on susceptible cultivars. While feeding, it injects a toxin that causes bright yellow lesions between leaf veins, which subsequently turn brown and die. Premature defoliation from heavy infestations reduces nut fill and can diminish the following year's production. Unlike yellow pecan aphids, M. caryaefoliae is considered more destructive even at low densities, with economic thresholds as low as three aphids per compound leaf.

  pestaphidpecanagricultureHemipteraAphididaefoliar-feedereconomic-pestintegrated-pest-managementparthenogenesis

• Melaphis rhois

  Staghorn sumac aphid, Sumac gall aphid

  Melaphis rhois is a woolly aphid that induces distinctive galls on sumac leaves (Rhus typhina and R. glabra). It was first described by Asa Fitch in 1866 and has a complex life cycle involving alternation between sumac and moss hosts. The species is part of a cryptic species complex; molecular and morphometric analyses have revealed at least three sympatric species in North America previously grouped under this name. It exhibits exceptionally low genetic diversity and pronounced population structure due to restricted gene flow among isolated galls.

  gall-formingwoolly-aphidhost-alternationcryptic-speciesparthenogenesisovoviviparityRhussumac

• Miastor

  Miastor is a genus of gall midges and wood midges in the family Cecidomyiidae, comprising approximately seven described species. The genus is notable for exhibiting paedogenesis, a rare reproductive strategy in which larvae reproduce parthenogenetically without metamorphosing into adults. Multiple asexual generations can occur before adults eventually develop. Larvae have been recorded in diverse habitats including fungal fruiting bodies, dung, tree bark, and decaying plant matter.

  paedogenesisparthenogenesisgall-midgefungivoreendoparasiteCecidomyiidae

• Microctonus

  Microctonus is a genus of braconid parasitoid wasps in the subfamily Euphorinae. Species are endoparasitoids of adult beetles, primarily targeting weevils (Curculionidae) and flea beetles (Chrysomelidae). The genus contains approximately 31 species in North America and additional species globally, including several used as classical biological control agents. Notable biocontrol species include M. aethiopoides and M. hyperodae, introduced to New Zealand to control forage pests, and M. aethiops and M. vittatae, used in North American agricultural systems. Many species exhibit parthenogenetic reproduction, with M. hyperodae showing arrhenotokous parthenogenesis (males produced parthenogenetically).

  parasitoidbiological-controlweevil-parasitoidendoparasitoidparthenogenesisEuphorinaeagricultural-pest-managementclassical-biocontrol

• Micromalthidae

  Telephone-pole Beetles

  Micromalthidae is an ancient, relictual family of beetles in the suborder Archostemata, represented today by a single extant species, Micromalthus debilis. The family has a fossil record extending to the Late Permian (approximately 260 million years ago), making it one of the oldest surviving beetle lineages. Members are characterized by highly unusual reproductive biology, including paedogenesis (reproduction by larvae) and parthenogenesis. The family shows extreme morphological reduction in adults, particularly males, with larvae serving as the primary feeding and persistent life stage.

  paedogenesisparthenogenesisliving-fossilxylophagyArchostemataxylobionticrelictualdevelopmental-polymorphismreduced-elytrabacterial-symbionts

• Micromalthus

  telephone-pole beetle

  Micromalthus is a monotypic genus of beetles containing the single living species Micromalthus debilis, commonly known as the telephone-pole beetle. It represents the sole extant member of the family Micromalthidae, making it a "living fossil" with all other relatives extinct. The genus has been the subject of considerable taxonomic controversy, historically placed in various families including Lymexylidae and Telegeusidae before its current classification in Archostemata. Its reproductive biology is extraordinarily complex, involving multiple developmental pathways and forms of parthenogenesis.

  living-fossilpaedogenesisparthenogenesiswood-boringarchostematadevelopmental-plasticity

• Micromalthus debilis

  Telephone-pole Beetle

  Micromalthus debilis is a small beetle native to eastern North America and the sole living representative of the family Micromalthidae, often considered a 'living fossil'. The species exhibits one of the most unusual reproductive strategies in Coleoptera: obligate paedogenesis, where reproduction occurs exclusively through parthenogenetic female larvae without production of fertile adults. Adults are vestigial, sterile, and rarely encountered in nature; they can be artificially induced through heat treatment but cannot reproduce. The species is associated with decaying wood and fungal near-red-rot habitats.

  paedogenesisparthenogenesisthelytokyhaplodiploidyliving-fossilvestigial-adultssex-role-reversalxylobiontendosymbiontRickettsiaWolbachiamatriphagyarchostematanunusual-reproductiontelephone-pole-beetle

• Mindarus

  balsam twig aphid

  Mindarus is a genus of conifer-feeding aphids in the family Mindaridae, commonly known as balsam twig aphids. Species in this genus are specialized phloem feeders on fir trees (Abies spp.), where they cause needle discoloration, shoot deformation, and reduced aesthetic quality. Several species are significant economic pests in Christmas tree plantations, particularly M. abietinus on balsam fir and M. pinicola on Fraser fir. The genus exhibits a holocyclic life cycle with overwintering eggs, spring fundatrices, and summer parthenogenetic generations.

  aphidconifer-pestChristmas-tree-pestAbiesphloem-feedereconomic-pestholocyclicparthenogenesisclimate-sensitivity

• Mocyta

  Mocyta is a genus of small rove beetles in the family Staphylinidae, subfamily Aleocharinae, tribe Athetini. The genus comprises 26 known Palearctic species, with five confirmed in Ukraine and additional species documented across Europe and North America. Species identification is complicated by significant individual variability in size, coloration, and spermatheca morphology. The genus has been used in ecological monitoring and biogeographic studies, particularly in forest ecosystems.

  rove-beetlesStaphylinidaeAleocharinaeAthetiniforest-faunataxonomic-difficultyparthenogenesisecological-monitoringPalearcticUkraine-fauna

• Monellia caryella

  Blackmargined Pecan Aphid, Black Margined Aphid

  Monellia caryella, commonly known as the blackmargined pecan aphid, is a small sap-feeding insect and significant pest of pecan (Carya illinoinensis) orchards in North America. Adults are distinguished by a prominent black stripe along the outer margin of their wings, which are held flat over the body. Populations typically increase from June to August, then decline after approximately three weeks; outbreaks on most cultivars usually subside without causing measurable damage, though the 'Cheyenne' cultivar is notably susceptible. The species is subject to substantial mortality from entomopathogenic fungi, particularly during autumn when environmental conditions favor fungal growth.

  pecan-pestaphidphloem-feederparthenogenesisentomopathogenic-fungiintegrated-pest-managementJuglandaceaeCarya-illinoinensisnatural-enemiesbiological-controlseasonal-abundanceintracanopy-distribution

• Monelliopsis

  yellow pecan aphid

  Monelliopsis is a genus of aphids (Hemiptera: Aphididae) in the subfamily Calaphidinae, established by Richards in 1965. The genus contains species that are specialized feeders on pecan (Carya illinoinensis), with Monelliopsis pecanis being the most economically significant species. These aphids are known as 'yellow pecan aphids' and are important pests of commercial pecan production in North America. They have piercing-sucking mouthparts and produce honeydew, which supports sooty mold growth. The genus is distinguished from the related Monellia by morphological and behavioral characteristics.

  aphidpecan-pestCalaphidinaephloem-feederhoneydew-produceragricultural-pestparthenogenesisNorth-America-nativeinvasive-in-Europe-and-Africa

• Monelliopsis pecanis

  Yellow Pecan Aphid

  Monelliopsis pecanis, commonly known as the yellow pecan aphid, is a sap-feeding insect in the family Aphididae that specializes on pecan (Carya illinoinensis). It is one of two primary 'yellow' or 'honeydew' aphid species affecting pecan production, distinguished from the blackmargined aphid (Monellia caryella) by its roof-like wing posture and lack of a black marginal stripe on the wings. Outbreaks typically occur later in the growing season than those of M. caryella and can cause significant defoliation, reduced nut yield, and quality degradation. The species reproduces parthenogenetically during spring and summer, with sexual forms appearing in autumn to produce overwintering eggs.

  pestagriculturalaphidpecanNorth-Americaintroduced-speciesparthenogenesishoneydew-producer

• Monostegia

  Monostegia is a genus of sawflies in the family Tenthredinidae. The genus contains at least one well-known species, M. abdominalis, commonly called the loosestrife sawfly. Adults are characterized by black heads and thoraxes with yellow legs and abdomens. The genus has a holarctic distribution, originally native to Europe and Asia but introduced to North America in the 1950s, where it has since expanded its range considerably.

  sawflyparthenogenesisintroduced-speciespestPrimulaceae

• Muellerianella

  Muellerianella is a genus of delphacid planthoppers comprising seven described species. The genus is notable for its complex reproductive biology, including both biparentally reproducing sexual species and asexual gynogenetic (pseudogamous) triploid forms. Species within the genus are morphologically similar but ecologically differentiated, occupying distinct habitat niches and exhibiting species-specific host plant associations. The Muellerianella complex has been extensively studied as a model system for understanding ecological speciation, hybridization, and the maintenance of species boundaries in the face of incomplete reproductive isolation.

  planthopperDelphacidaegrasslandwetlandgynogenesisparthenogenesishost-specificityecological-speciation

• Mycophila

  wood midges

  Mycophila is a genus of cecidomyiid midges established by Ephraim Porter Felt in 1911, comprising seven described species. Species within this genus are associated with fungal substrates, with some documented as pests of cultivated mushrooms. The genus exhibits diverse reproductive strategies including paedogenesis and parthenogenesis. At least three species have been recorded from China, with additional species known from North America and Europe.

  Cecidomyiidaemycophagouspaedogenesisparthenogenesismushroom-pestfungus-feedingChinaNorth-AmericaEurope

• Myosides

  Myosides is a genus of weevils in the family Curculionidae, subfamily Entiminae. The genus was established by Roelofs in 1873 and is native to Asia. At least one species, Myosides seriehispidus, is known to have established populations in North America since 2000.

  weevilparthenogenesisintroduced-speciesAsiaNorth-America

• Myosides seriehispidus

  Hair-banded Broad-nosed Weevil

  Myosides seriehispidus is a broad-nosed weevil native to Asia that has established populations in North America since 2000. It is notable for its triploid chromosome complement and obligate parthenogenetic reproduction, meaning all individuals are female and reproduce without mating. The species is commonly known as the Hair-banded Broad-nosed Weevil.

  parthenogenesistriploidyintroduced-speciesAsia-nativeNorth-America-introduced

• Myzus

  Myzus is a genus of aphids in the family Aphididae with cosmopolitan distribution, originally native to the Old World. The genus contains economically significant pest species, most notably Myzus persicae (green peach aphid), which is a major vector of plant viruses affecting crops worldwide. Species in this genus exhibit complex life cycles involving host alternation between primary woody hosts and secondary herbaceous hosts. Several Myzus species have been extensively studied for their role in agricultural pest management and virus transmission.

  aphidpestvirus-vectoragriculturegreen-peach-aphidparthenogenesishost-alternation

• Myzus cerasi

  black cherry aphid, cherry blackfly

  Myzus cerasi, commonly known as the black cherry aphid or cherry blackfly, is a phloem-feeding aphid native to Europe that has become cosmopolitan in distribution. The species exhibits complex host alternation between primary hosts (Prunus cerasus and Prunus avium) and secondary hosts (Galium and Veronica species). Two host-specific subspecies are recognized: M. c. cerasi on sour cherry and M. c. pruniavium on sweet cherry, distinguished by mitochondrial COI haplotypes and subtle morphological differences. The species is a significant agricultural pest of cherry orchards, forming dense colonies that cause leaf curling and damage to new growth.

  agricultural-pestaphidhost-alternationcherry-pestparthenogenesisphloem-feederintegrated-pest-managementbiopesticide-targettranscriptional-plasticityhost-specific-subspecies

• Myzus persicae

  green peach aphid, greenfly, peach-potato aphid

  Myzus persicae is a globally distributed aphid pest with a life cycle alternating between primary woody hosts (Prunus spp., especially peach) and secondary herbaceous hosts across 40 plant families. The species exhibits cyclical parthenogenesis in most populations, with sexual reproduction and egg-laying restricted to autumn on primary hosts. It is the most economically important aphid vector of plant viruses, capable of transmitting over 100 different viruses to crops including potato, tobacco, and brassicas. Some genotypes have lost sexual reproduction entirely, becoming obligate parthenogens that persist year-round on secondary hosts.

  aphidpestvirus-vectoragricultural-pestparthenogenesisinvasive-species

• Naryciinae

  Naryciinae is a subfamily of bagworm moths (Psychidae) characterized by monandrous females that mate only once. Females are immobile and wingless, while males are short-lived, non-feeding, and capable of multiple copulations. Several species exhibit parthenogenetic reproduction, including *Dahlica fennicella* and *D. triquetrella*. The subfamily serves as host for a diverse parasitoid wasp complex in northern European populations.

  monandryparthenogenesisbagworm-mothparasitoid-hostsexual-dimorphism

• Naupactini

  broad-nosed weevils

  Naupactini is a diverse tribe of broad-nosed weevils (subfamily Entiminae) with highest genus and species diversity in South America. Members range from 3.5 to 35 mm and exhibit diverse coloration including iridescent scales. The tribe is notable for frequent flightlessness and parthenogenesis in habitats with sparse vegetation, with parthenogenesis linked to Wolbachia bacterial infection. Several species are agricultural pests, particularly on Fabaceae.

  weevilNeotropicalparthenogenesisWolbachiaagricultural-pestroot-feederflightless

• Naupactus

  White-fringed Weevils

  Naupactus is a large genus of weevils in the family Curculionidae, commonly known as white-fringed weevils. The genus comprises exclusively Neotropical species, several of which have been introduced to other regions and become significant agricultural pests. Members of this genus are characterized by reduced humeri and lack of metathoracic wings, traits formerly used to separate them into the genus Graphognathus before taxonomic revision. Some species exhibit parthenogenetic reproduction, and flightless adults are common.

  weevilpestagricultureparthenogenesisflightlessinvasiveNeotropicalwhite-fringedCurculionidaeEntiminaeNaupactinigrape-pestcitrus-pestquarantine-pest

• Naupactus leucoloma

  white-fringed weevil, white-fringed beetle

  Naupactus leucoloma is a broad-nosed weevil native to South America that has become a globally distributed agricultural pest. Adults are flightless, parthenogenetic females outside their native range, with males occurring only rarely in Argentina, Uruguay, and southern Brazil. The species is notable for its extreme polyphagy, having been documented feeding on over 385 plant species. Larval root-feeding causes substantially more economic damage than adult folivory.

  parthenogenesisthelytokyflightlesspolyphagyagricultural-pestintroduced-speciesroot-feederCurculionidaeEntiminaeSouth-America-nativeinvasive-weevilsexual-dimorphismrare-males

• Nauphoeta

  speckled cockroach, lobster cockroach, cinereous cockroach

  Nauphoeta is a monotypic genus of cockroaches in the family Blaberidae, containing the single species Nauphoeta cinerea. The genus is notable for its well-studied social behavior, including male territoriality and dominance hierarchies. Nauphoeta cinerea has become a widely used laboratory model organism for behavioral, physiological, and toxicological research, and has achieved a circumtropical distribution through human-mediated dispersal.

  model-organismlaboratory-animallive-foodbehavioral-ecologysocial-insectparthenogenesisWolbachiainvasive-species

• Neocloeon

  Neocloeon is a genus of mayflies in the family Baetidae. The species Neocloeon triangulifer has emerged as an important laboratory model organism for aquatic ecotoxicology and physiological studies due to its sensitivity to environmental stressors and ability to complete its life cycle in controlled conditions. The genus is distinguished by parthenogenetic reproduction in at least some populations, a trait that facilitates laboratory culture. Species in this genus inhabit freshwater streams and serve as bioindicators for water quality assessment.

  mayflyEphemeropteraBaetidaeaquatic-insectecotoxicologybioindicatorparthenogenesisthermal-biologyneonicotinoid-sensitivitylaboratory-model

• Neodiprion abietis

  balsam fir sawfly

  Neodiprion abietis, the balsam fir sawfly, is a conifer-feeding sawfly native to North America. Larvae are gregarious defoliators that feed preferentially on balsam fir (Abies balsamea) needles, with outbreaks capable of causing significant tree mortality in eastern Canadian forests. The species exhibits sexual dimorphism in development, with females typically undergoing six instars over 35 days and males five instars over 30 days. Population dynamics are strongly regulated by a host-specific nucleopolyhedrovirus (NeabNPV), which has been developed as a registered biological insecticide (Abietiv™) for outbreak management.

  sawflyconifer-pestdefoliatorbiological-controlbaculovirusforest-entomologyDiprionidaeAbies-balsameaparthenogenesisgregarious-feeder

• Neodiprion pratti

  Virginia pine sawfly, jack pine sawfly

  Neodiprion pratti is a conifer sawfly native to North America with documented populations in Canada and the eastern United States. The species exhibits complex host-associated population structure, with distinct populations adapted to specific pine hosts including Virginia pine (Pinus virginiana), jack pine (Pinus banksiana), sand pine (Pinus clausa), slash pine (Pinus elliottii), and longleaf pine (Pinus palustris). Populations show significant variation in life history, with northern forms typically univoltine and a distinctive West Florida population exhibiting winter-active phenology with adults emerging in October-November.

  sawflyconifer-pestdefoliatorgregarious-feederpine-specialistwinter-active-phenotypeparthenogenesischemical-defense

• Neohydatothrips

  soybean thrips (N. variabilis), marigold thrips (N. samayunkur)

  Neohydatothrips is the most species-rich genus in the Thripidae subfamily Sericothripinae, with approximately 120 described species. Members are phytophagous thrips that feed and breed on leaves and flowers of diverse host plants. Several species are economically significant agricultural pests and plant virus vectors, including N. variabilis (soybean thrips), which transmits soybean vein necrosis orthotospovirus. The genus has a global distribution with approximately 70% of species occurring in the New World.

  thripsThripidaeSericothripinaephytophagouspestvirus-vectorsoybeanpassion-fruitagricultureintegrated-pest-managementarrhenotokyparthenogenesisclimate-driven-population-dynamicskairomonemass-trapping

• Neoprociphilus aceris

  woolly maple aphid, woolly alder aphid

  Neoprociphilus aceris is a woolly aphid species in the family Aphididae, commonly known as the woolly maple aphid or woolly alder aphid. It exhibits a holocyclic life cycle with alternating sexual and parthenogenetic generations on alder trees (Alnus spp.). The species produces dense woolly wax secretions covering its body, forming conspicuous colonies on branches and twigs. It is a phloem-feeding specialist with documented host associations primarily with alder, though its common name suggests potential maple associations that require verification.

  woolly-aphidholocyclicphloem-feederAlnus-specialistPemphiginaewax-secretionparthenogenesisautumn-egg-laying

• Neuroterus anthracinus

  Oyster Gall Wasp

  Neuroterus anthracinus is a gall wasp in the family Cynipidae that forms chemically induced leaf galls on oak trees. The species exhibits heterogony, alternating between sexual and agamic (parthenogenetic) generations that produce two distinct gall types: the oyster gall and the April-bud gall. This wasp has been widely distributed across Europe and has been introduced to North America.

  gall-waspcynipidoak-gallheterogonyparthenogenesisleaf-gallbud-gallintroduced-species

• Neuroterus niger

  jumping gall wasp, black jumping gall wasp

  Neuroterus niger is a species of gall wasp in the family Cynipidae that induces distinctive galls on oak leaves. This species exhibits an alternating sexual and asexual life cycle, with different generations producing different gall types. The asexual generation creates small, spherical galls that detach from leaves and fall to the ground, where the larva's movements cause the gall to jump—giving rise to the common name "jumping gall." The sexual generation produces inconspicuous leaf galls. The species has been documented across much of eastern and central North America.

  Cynipidaegall-waspoak-galljumping-gallheterogonyparthenogenesisNorth-AmericaQuercus

• Neuroterus quercusminutissimus

  Neuroterus quercusminutissimus is a species of cynipid gall wasp in the genus Neuroterus. The species was described by Ashmead in 1885 and is associated with oak trees (Quercus species), as indicated by its specific epithet. Like other Neuroterus species, it induces the formation of galls on oak tissue. The genus Neuroterus contains approximately 50-60 species, many of which are known for their complex life cycles involving alternating generations that produce different gall types on oak leaves or other plant parts.

  cynipidaegall-waspoak-gallhymenopteraparasitoid-hostquercusneuroterusparthenogenesisalternating-generations

• Neuroterus saltarius

  Jumping Gall Wasp

  Neuroterus saltarius is a species of gall wasp in the family Cynipidae, commonly known as the jumping gall wasp. It induces distinctive leaf galls on oak trees that detach from the plant and fall to the ground. The developing larva inside the fallen gall can cause the gall to jump when it moves, a unique behavioral trait that gives the species its common name. This species is part of the diverse Neuroterus genus, which contains many oak-associated gall wasps with complex life cycles.

  gall-waspCynipidaeoakjumping-gallparthenogenesisNeuroterusleaf-gallground-dwelling-gall

• Neuroterus saltatorius

  Jumping Gall Wasp

  Neuroterus saltatorius, commonly known as the jumping gall wasp, is a North American oak gall wasp in the family Cynipidae. The species is notable for producing small, round galls that detach from leaves and exhibit a distinctive jumping behavior caused by larval movements. It has a complex life cycle with alternating bisexual and parthenogenetic generations, each producing different gall types on oak hosts.

  gall-waspoak-galljumping-gallheterogonyparthenogenesisCynipidaeNeuroterusoakQuercus

• Nothridae

  Nothridae is a family of oribatid mites comprising at least 3 genera and approximately 70 described species. The family includes the genera Nothrus (semi-cosmopolitan), Novonothrus (Gondwanan distribution), and Trichonothrus (previously known only from South Africa, now recorded from Australia). Members are primarily associated with moist forest habitats, particularly cool temperate rainforests. Australian Nothridae show relict Gondwanan biogeographical affinities, with high diversity of sexual species in temperate rainforests contrasting with thelytokous parthenogenetic species in the Northern Hemisphere.

  mitesoribatidsGondwanan-distributionrainforestNothofagussexual-reproductionparthenogenesisAustraliaNew-ZealandChileSouth-AfricaEcuador

• Notomicrus

  Notomicrus is a genus of small water beetles in the family Noteridae, first described by Sharp in 1882. Species occur in freshwater habitats across the New World, from North America through Central America to South America and the Caribbean. The genus includes at least 13 described species, with several recent descriptions from Guadeloupe and Suriname. Some species exhibit unusual reproductive traits, including suspected obligate parthenogenesis.

  water-beetleaquaticColeopteraNoteridaeNew-Worldfreshwaterparthenogenesisendemic-speciesGuadeloupeSurinamehygropetric-seepmale-genitaliataxonomy

• Oligotomidae

  webspinners

  Oligotomidae is a family of webspinners (order Embioptera) comprising approximately 6 genera and at least 40 described species. Members are characterized by silk-producing glands in the enlarged basal tarsomere of the forelegs, used to construct protective galleries. The family exhibits a predominantly Old World distribution with some introduced populations in the Americas. Notable genera include Oligotoma, Aposthonia, and Haploembia, with some species showing complex reproductive strategies including parthenogenesis.

  webspinnerssilk-productionsubsocialparthenogenesisintroduced-speciesOld-World-distribution

• Oobius

  Oobius is a genus of parasitic non-stinging wasps in the family Encyrtidae (Hymenoptera: Chalcidoidea). Species are specialized egg parasitoids of wood-boring beetles, particularly in the family Buprestidae (jewel beetles) and Cerambycidae (longhorn beetles). The genus has gained significant attention due to the use of O. agrili as a biological control agent against the invasive emerald ash borer (Agrilus planipennis) in North America. Oobius species are small, morphologically cryptic wasps that are often distinguished by subtle differences in antennal structure and tarsomere count. Several species exhibit parthenogenetic reproduction and undergo diapause to synchronize their life cycles with host availability.

  biological-controlegg-parasitoidemerald-ash-borerChalcidoideaparthenogenesisdiapauseforest-entomologyinvasive-species-management

• Oobius agrili

  Oob

  Oobius agrili is a tiny, solitary egg parasitoid wasp in the family Encyrtidae, native to Northeast Asia. It is the only egg parasitoid released for biological control of the invasive emerald ash borer (Agrilus planipennis) in North America, where it has been introduced in over 31 US states. The species is parthenogenic, produces multiple generations annually, and achieves partial phenological synchrony with its host's egg-laying period. Individual females can parasitize more than 60 host eggs, with field parasitism rates reaching 60% in optimal conditions.

  parasitoidbiological-controlemerald-ash-borerinvasive-species-managementHymenopteraEncyrtidaeforest-entomologyclassical-biological-controlparthenogenesisdiapausemultivoltineash-treesFraxinusAgrilus-planipennisNorth-America-introductionNortheast-Asia-native-range

• Oonopidae

  Goblin spiders

  Oonopidae, commonly known as goblin spiders, is a diverse family of minute spiders comprising approximately 2,000 described species across 115 genera worldwide, with total species diversity estimated at 2,000–2,500. These spiders are characterized by their tiny size (typically 1–3 mm), reduced eye number (usually six, though some species have four, two, or are completely eyeless), and frequently exhibit unusual morphological modifications in males. The family shows remarkable morphological diversity including hardened abdominal plates (scuta), modified mouthparts, sternal pouches, and elaborate pedipalp structures. Goblin spiders are predominantly ground-dwelling, inhabiting leaf litter, soil, and rock crevices, with some lineages adapted to canopy habitats, caves, or termite nests. The family has an extensive fossil record in amber deposits dating back over 100 million years, with Orchestina already widespread by the end of the Cretaceous.

  goblin-spidersmicrospidersleaf-litter-faunaamber-fossilsCretaceous-survivorstropical-diversitymale-morphological-diversitycave-adaptationparthenogenesis

• Otiorhynchini

  Otiorhynchini is a tribe of true weevils within the subfamily Entiminae, family Curculionidae. The tribe was established by Schönherr in 1826 and contains approximately 24 extant genera, including the large and economically significant genus Otiorhynchus. Members of this tribe are part of the broad-nosed weevil group, characterized by their relatively short, broad rostrums compared to other weevil lineages. The tribe includes both extant and fossil genera, with two extinct genera known from the fossil record.

  CurculionidaeEntiminaeweevilbroad-nosed-weevilagricultural-pestparthenogenesis

• Otiorhynchus

  root weevils, vine weevils

  Otiorhynchus is a large genus of flightless weevils containing over 1,500 species distributed across more than 110 subgenera. The genus is native to the Palearctic region, though sixteen species have become established in North America as introduced pests. Several species, notably the black vine weevil (O. sulcatus) and strawberry root weevil (O. ovatus), are economically significant agricultural pests. The genus exhibits unusual reproductive diversity, with many species containing both diploid bisexual and polyploid parthenogenetic populations.

  flightlessparthenogenesispestnocturnalroot-feedertroglobite

• Otiorhynchus sulcatus

  black vine weevil, vine weevil, strawberry weevil, cyclamen weevil

  Otiorhynchus sulcatus is a parthenogenetic weevil native to the Palearctic region that has become a globally significant horticultural pest. Adults are flightless, nocturnal, and feed on foliage, producing characteristic notching damage along leaf margins. Larvae develop belowground, feeding on roots, corms, and rhizomes, causing severe plant damage or death. The species reproduces exclusively through thelytokous parthenogenesis; males are absent from all populations. Adults exhibit strong visual and thigmotactic preferences for refuge selection, favoring dark colors (black, blue), tall silhouettes, and basal entrance openings.

  parthenogenesisthelytokyflightlessnocturnalhorticultural-pestpolyphagousvisual-ecologyrefuge-seekingbelowground-herbivoryinvasive-speciesentomopathogenic-nematode-host

• Parisotoma

  Parisotoma is a genus of elongate-bodied springtails in the family Isotomidae, comprising approximately 11 described species. The genus is notable for containing Parisotoma notabilis, one of the most abundant and widely studied springtails in temperate regions of the northern hemisphere. This species complex exhibits extensive cryptic genetic diversity, with at least six distinct lineages that show differential distribution patterns and habitat associations. Parisotoma species are eurytopic soil microarthropods used in biological monitoring and ecological research.

  springtailCollembolasoil-mesofaunacryptic-speciesparthenogenesisbioindicatorurban-ecologygenetic-lineages

• Parisotoma notabilis

  elongate-bodied springtail

  Parisotoma notabilis is a cosmopolitan, eurytopic springtail in the family Isotomidae and one of the most abundant Collembola species in temperate regions of the northern hemisphere. Despite morphological uniformity, the species comprises six distinct genetic lineages (L0, L1, L2, L3, L4-Saltzwedel, L4-Hebert) with divergence levels approaching species boundaries. It is predominantly parthenogenetic, with males rarely occurring, which facilitates rapid colonization of disturbed habitats. The species is widely used as a model organism for studying soil microarthropod population genetics and serves as a bioindicator for environmental monitoring.

  springtailCollembolaparthenogenesiscryptic-speciessoil-mesofaunabioindicatorurbanizationpopulation-geneticseurytopicgenetic-lineage

• Pelecinidae

  pelecinid wasps

  Pelecinidae is a family of parasitic wasps in the superfamily Proctotrupoidea, containing only one living genus, Pelecinus, with three extant species restricted to the Americas. The family was highly diverse during the Cretaceous, with fossils from 43 species in a dozen genera found across North America, Europe, and Asia dating back to the early Cretaceous (121–124 mya). Today, the family is represented by a single genus with three species: Pelecinus polyturator (widespread from southern Canada through South America), P. thoracicus (Mexico), and P. dichrous (South America). All species are parasitoids of scarab beetle larvae.

  parasitoidscarab-parasiteparthenogenesisrelict-faunafossil-waspssoil-dwellingnon-stinging

• Pemphigus

  Poplar Leaf-stem Gall Aphids

  Pemphigus is a genus of gall-forming aphids in the family Aphididae, commonly known as poplar leaf-stem gall aphids. Species in this genus are specialized herbivores that induce distinctive galls on poplar (Populus) and related host plants. The genus is notable for its complex life cycles involving alternation between primary woody hosts and secondary herbaceous hosts, with some species remaining entirely on roots of secondary hosts. Pemphigus species are frequently confused with other root-feeding aphids in agricultural and horticultural contexts.

  aphidgall-formerPopulusroot-feederFordiniparthenogenesishost-alternation

• Pemphigus spyrothecae

  Poplar Spiral Gall Aphid

  Pemphigus spyrothecae is a gall-forming aphid that induces distinctive spiral-shaped galls on leaf petioles of Populus nigra. The species exhibits eusocial behavior with a sterile soldier caste comprising first-instar nymphs with thickened hind legs that defend the colony against predators. Colony defense includes fortress defense, gall repair, and maintenance of colony hygiene. The aphid has a holocyclic life cycle with four generations: fundatrix, apterous virginoparae, alate sexuparae, and sexual males and females. Genetic relatedness within galls is high due to clonal reproduction, with clonal mixing averaging 0.68-10.4% across populations.

  gall-formingeusocialsoldier-castealtruismPopulus-nigraholocyclicparthenogenesisfortress-defensekin-selection

• Periphyllus lyropictus

  Norway Maple Aphid

  Periphyllus lyropictus is a specialist aphid species feeding exclusively on Norway maple (Acer platanoides). It possesses a distinctive di-symbiotic bacterial system involving Buchnera aphidicola and Serratia symbiotica as co-obligate nutritional endosymbionts. The S. symbiotica strain in this species exhibits a highly invasive phenotype with bacterial motility due to complete flagellum expression, contrasting with the strictly compartmentalized symbiont arrangement found in related aphid species. The two symbionts metabolically complement each other for biosynthesis of essential amino acids and B vitamins.

  aphidendosymbiosisdi-symbiotic-systemSerratia-symbioticaBuchnera-aphidicolaflagellar-motilitymaple-specialistparthenogenesisinvasive-symbiont-phenotypeChaitophorinae

• Petrobia

  brown wheat mite, oxalis mite

  Petrobia is a genus of spider mites in the family Tetranychidae, containing 34 described species. The genus includes several economically important agricultural pests, notably P. latens (brown wheat mite) and P. harti (oxalis mite). Species are distinguished by morphological features including elongated first leg pairs, pad-like claws with hooked empodia, and distinctive prodorsal setae arrangements. The genus is divided into three subgenera: Mesotetranychus, Petrobia, and Tetranychina, differentiated primarily by peritreme structure and dorsal setae characteristics.

  spider-miteagricultural-pestwheat-pestparthenogenesisTetranychidaeacarologycrop-protectionvirus-vectordryland-agricultureintegrated-pest-management

• Phalangiidae

  Phalangiid Harvestmen, Harvestmen

  A family of harvestmen (Opiliones: Eupnoi) containing approximately 380 described species. The family includes the widespread and well-studied Phalangium opilio, one of the most recognizable harvestmen in temperate regions. Members are characterized by long, slender legs and a fused body lacking the narrow waist seen in spiders. The family has a primarily Holarctic distribution with some representation in Africa and other regions.

  harvestmanOpilionesEupnoilong-leggedpredatorparthenogenesisHolarctic

• Phasmatidae

  stick insects, walking sticks

  Phasmatidae is a family of stick insects characterized by extreme elongation of the body and limbs to resemble twigs or branches. Members range from small species to the largest insects known, with Phobaeticus chani reaching 567 mm total length. The family exhibits remarkable crypsis through body form, coloration, and behavior, including swaying movements that mimic branches in wind. Many species possess defensive chemical glands when camouflage fails. The family has undergone significant taxonomic revision, with six subfamilies recognized in Phasmatidae sensu stricto.

  crypsiscamouflagefolivorymyrmecochorychemical-defenseautotomyparthenogenesisgiant-insectssystematics

• Phasmida

  stick insects, walking sticks, stick-bugs, phasmids, ghost insects, leaf insects

  Phasmida is an order of insects comprising approximately 3,000 valid species worldwide, grouped into 523 genera and 13 families. Members are renowned for extreme cryptic morphology resembling sticks, twigs, or leaves, with elongated bodies and appendages that match host vegetation in color and texture. The order exhibits remarkable size variation, from small species to the longest insects known, with some exceeding 18 inches in length. The group was formerly classified within Orthoptera but now constitutes its own order based on distinct morphological and molecular characteristics. The name derives from Greek 'phasma' (apparition, ghost), referencing their uncanny resemblance to inanimate plant parts.

  crypticherbivorousnocturnalautotomychemical-defensemyrmecochorysexual-dimorphismparthenogenesis

• Phenacoccus solani

  Solanum Mealybug

  Phenacoccus solani, commonly known as the solanum mealybug, is a parthenogenetic mealybug species in the family Pseudococcidae. It reproduces via thelytokous parthenogenesis, with females producing viable offspring without males. The species has a broad host range including plants in Solanaceae, Amaryllidaceae, and Compositae families, and is recognized as a pest of tomato, cotton, and ornamental plants. Historically confused with P. defectus due to morphological similarity, molecular and morphometric analyses confirmed these as conspecific in 2016, with P. defectus synonymized under P. solani. The species has a cosmopolitan distribution spanning the Nearctic, Mediterranean basin, Asia, South America, Africa, Australia, and Pacific islands.

  mealybugparthenogenesispestagricultureornamentalstomatocottonbiological-controlinvasive-species

• Phyllonorycter emberizaepenella

  Large Midget

  A small leaf-mining moth in the family Gracillariidae with a wingspan of 9–10 mm. It reproduces exclusively by thelytokous parthenogenesis, with no males known to exist. Females nevertheless display diurnal calling behavior and produce sex pheromone compounds, despite the absence of mate attraction. The species is widespread across Europe and has been introduced to North America.

  leaf-minerparthenogenesisthelytokyGracillariidaeLonicerahoneysuckleintroduced-species

• Phylloxera

  phylloxeras

  Phylloxera is a genus of tiny, soft-bodied, sap-sucking insects in the family Phylloxeridae, closely related to aphids. The genus includes economically significant agricultural pests, most notably the grape phylloxera (Daktulosphaira vitifoliae), which devastated European vineyards in the late 19th century and remains a major threat to viticulture worldwide. Phylloxera species induce characteristic galls on host plants through chemical secretions that manipulate plant tissue development. The genus exhibits complex life cycles involving multiple morphological forms, including winged and wingless parthenogenetic generations and a brief sexual generation.

  agricultural-pestgall-formerviticultureinvasive-speciesparthenogenesispolymorphismSternorrhynchaPhylloxeridaeroot-feedingleaf-gallingeconomic-entomologyintegrated-pest-managementresistant-rootstockgrafting19th-century-agricultural-disasterpollution-bioindicator

• Phylloxera caryaeavellana

  hickory phylloxeran, hickory phylloxera

  Phylloxera caryaeavellana is a small, gall-forming insect in the family Phylloxeridae that infests hickory trees (Carya species). The species causes distinctive swollen, globular galls to form on leaves, petioles, and leaf veins during spring growth. It is closely related to aphids and shares their piercing-sucking mouthpart morphology. The insect has a complex life cycle involving multiple generations and winged dispersal forms. Unlike the economically devastating grape phylloxera (Daktulosphaira vitifoliae), this species is primarily a curiosity rather than a significant agricultural pest, causing minimal lasting damage to healthy host trees.

  gall-formerphylloxeridhickory-pestSternorrhynchaparthenogenesisplant-manipulation

• Phylloxera caryaeglobuli

  hickory phylloxeran, hickory phylloxera

  Phylloxera caryaeglobuli is a small, soft-bodied, gall-forming insect closely related to aphids. It induces distinctive globular galls on hickory leaves and petioles, particularly on mockernut hickory. The species has a complex life cycle involving parthenogenetic reproduction within galls and winged dispersal stages. It overwinters as eggs deposited on bark or near old galls.

  gall-formerphylloxerahickory-pestSternorrhynchaparthenogenesis

• Phylloxera caryaescissa

  pecan leaf phylloxera, hickory phylloxeran

  Phylloxera caryaescissa is a tiny, soft-bodied insect closely related to aphids that forms galls on hickory and pecan leaves. The species survives winter as eggs in bark crevices, with nymphs emerging during spring bud break to feed on new growth. Unlike the more destructive pecan phylloxera (Phylloxera devastatrix), this species attacks leaf tissue only and does not damage shoots or nuts. Extensive infestations may cause some defoliation but typically do not significantly reduce yield.

  phylloxerapecan-pesthickory-pestgall-formerSternorrhynchaparthenogenesisleaf-gall

• Phylloxera chippokesiensis

  Phylloxera chippokesiensis is a gall-forming insect in the family Phylloxeridae, closely related to aphids. Like other phylloxerans, it induces abnormal plant growths (galls) on host tissues through chemical secretions that redirect plant development. The species is named for Chippokes Plantation in Virginia, indicating an association with specific geographic or host plant contexts. As with congeners, it likely has a complex life cycle involving parthenogenetic reproduction within galls and seasonal transitions between winged and wingless forms.

  phylloxeragall-formerHemipteraPhylloxeridaeVirginia-endemicChippokes-Plantationparthenogenesisplant-manipulationSternorrhynchaaphid-relativeundocumented-biology

• Phylloxera conica

  hickory phylloxeran, hickory phylloxera

  Phylloxera conica is a gall-forming insect closely related to aphids that induces distinctive globular galls on hickory leaves and petioles. The insect overwinters as eggs on bark or near old galls, with nymphs emerging during bud break to feed on new growth. Their feeding stimulates abnormal plant cell development, creating hollow galls that provide shelter and food. The species has a complex life cycle involving multiple generations, with winged forms eventually dispersing to lay overwintering eggs. Heavy infestations can reduce tree vigor and nut production in hickory trees.

  gall-formerphylloxerahickory-pestSternorrhynchaparthenogenesisfundatrix

• Phylloxera crypta

  Phylloxera crypta is a gall-forming insect closely related to aphids, known to induce distinctive galls on hickory trees (Carya species). Like other phylloxerans, this species manipulates plant tissue development through chemical secretions during feeding, creating protective structures that house developing nymphs. The species exhibits a complex life cycle involving multiple generations and both sexual and parthenogenetic reproduction phases.

  phylloxeragall-formerhickory-pestSternorrhynchaCaryacomplex-life-cycleparthenogenesisfundatrixgall-induction

• Phylloxera subelliptica

  Phylloxera subelliptica is a gall-forming insect in the family Phylloxeridae, closely related to aphids. Like other phylloxerans, this species induces abnormal plant growths (galls) on host plants through chemical secretions that manipulate plant tissue development. The species was described by Shimer in 1869. Phylloxerans typically have complex life cycles involving multiple generations and both sexual and parthenogenetic reproduction.

  gall-formerphloem-feederparthenogenesistree-pestSternorrhyncha

• Phylloxera wiedenmanni

  Phylloxera wiedenmanni is a gall-forming phylloxeran that induces galls on hickory trees. As a member of the family Phylloxeridae, it is closely related to aphids and shares their piercing-sucking mouthpart morphology. The species overwinters as eggs deposited on bark or near old galls, with nymphs emerging during bud break to feed on new leaf tissue. Its feeding stimulates the formation of globular galls on leaves and petioles, within which the insect completes development. The species exhibits complex life history traits including parthenogenetic reproduction within galls and winged dispersal forms.

  gall-formerphylloxeranhickory-pestparthenogenesisSternorrhynchanative-speciesminimal-economic-impact

• Phylloxeridae

  phylloxerans, phylloxerids

  Phylloxeridae is a small family of plant-parasitic hemipterans comprising approximately 75 described species across 11 genera and two subfamilies (Phylloxerininae and Phylloxerinae). These minute insects are closely related to aphids and adelgids, with which they share the superfamily Phylloxeroidea. They are specialized gall-formers on deciduous trees and perennial fruit crops, with complex life cycles involving cyclical parthenogenesis and host alternation between primary woody hosts and secondary herbaceous hosts. The family includes the economically devastating grape phylloxera (Daktulosphaira vitifoliae), responsible for the 19th-century European vineyard crisis.

  HemipteraSternorrhynchagall-formerphloem-feederparthenogenesishost-alternationagricultural-pestviticulturececidogenesispolymorphism

• Phylloxerina

  Phylloxerina is a genus of phylloxerids—small, sap-sucking true bugs in the family Phylloxeridae. These insects are closely related to aphids and are known for inducing distinctive leaf galls on host plants. The genus includes species such as Phylloxerina nyssae, which forms crescent-shaped galls on black tupelo (Nyssa sylvatica). Phylloxerids are morphologically unusual among Sternorrhyncha, with wax-covered bodies and complex life cycles involving both gall-dwelling and bark-dwelling generations. The genus is native to northern North America.

  phylloxeridgall-formerNyssablack-tupeloparthenogenesiswax-secretionSternorrhyncha

• Phytomyza plantaginis

  Plantain leafminer

  Phytomyza plantaginis is a leaf-mining fly in the family Agromyzidae. It is notable as the second documented case of parthenogenetic reproduction (thelytoky) in its family. Populations in Australia exhibit variation in sex ratio, with some areas having only females and others maintaining bisexual populations with female-biased ratios. The species is associated with Plantago host plants.

  leafminerparthenogenesisthelytokysex-ratio-variationWolbachiaPlantagoagromyzidDiptera

• Platythyrea

  Platythyrea is a genus of predatory ants in the subfamily Ponerinae and the sole member of the tribe Platythyreini. Workers range from 4–20 mm in size. The genus exhibits remarkable reproductive diversity: most species have gamergates (reproductive female workers), though P. conradti has ergatoid queens instead. Some species with gamergates also produce alate queens. The genus has a worldwide distribution in tropical and subtropical regions.

  antsponerinaeparthenogenesisgamergatestrophallaxisage-polyethismpredatorytropicalclonal-reproductionthelytoky

• Platythyrea punctata

  Common Silvery Hunter Ant

  Platythyrea punctata is a neotropical ant species distinguished by its remarkable reproductive flexibility. Most populations reproduce through thelytokous parthenogenesis, where unmated workers produce female offspring from unfertilized eggs, resulting in colonies with clonal genetic structure. The species also exhibits facultative sexual reproduction, with occasional queens, gamergates (mated reproductive workers), and males appearing in some populations. This combination of alternative reproductive tactics is unique among ants and has made the species a model for studying social evolution, division of labor, and the transition between sexual and asexual reproduction.

  antparthenogenesisthelytokysocial-insectclonalneotropicalreproductive-plasticityage-polyethismgamergatepolicing-behavior

• Podon

  Podon is a genus of marine cladocerans in the family Podonidae, characterized by onychopod morphology. The genus includes at least four described species: P. intermedius, P. leuckarti, P. leuckartii, and P. schmackeri. Members are euryhaline and eurythermal, inhabiting estuarine and coastal marine waters. Populations exhibit strong seasonal dynamics, with spring and fall peaks and summer disappearance in temperate regions.

  marinecladoceranplanktonestuarineseasonalonychopodeuryhalineeurythermalparthenogenesisresting-eggs

• Polyphemus pediculus

  Polyphemus pediculus is a predatory freshwater cladoceran crustacean in the family Polyphemidae. It is distributed throughout the Northern Hemisphere but exhibits significant genetic structuring, representing at least nine largely allopatric cryptic species rather than a truly cosmopolitan population. The species displays complex reproductive behavior involving both parthenogenetic and gamogenetic (sexual) phases, with pronounced seasonal and daily rhythms in swarming activity.

  cryptic-speciesphylogeographyparthenogenesisswarming-behaviorfreshwater-zooplanktonpredatory-cladoceranresting-eggsseasonal-polymorphism

• Polyxenus lagurus

  Bristly Millipede

  Polyxenus lagurus, commonly known as the bristly millipede, is a small millipede species distinguished by its detachable defensive bristles that entangle attacking ants and spiders. It exhibits a unique reproductive polymorphism, with some populations reproducing sexually and others parthenogenetically. This species undergoes hemianamorphosis, adding segments and legs through juvenile molts until reaching a fixed adult complement of 13 leg pairs and 10 tergites, after which molting continues without further segment addition. It is the most common polyxenid in Europe and the only representative of order Polyxenida in the British Isles.

  millipedebristly-millipededefensive-bristleshemianamorphosisparthenogenesissexual-reproductionHolarcticconiferous-forestbark-habitat

• Poratia

  Poratia is a genus of minute polydesmidan millipedes in the family Pyrgodesmidae, characterized by obligate parthenogenetic reproduction via thelytoky. The genus includes Poratia salvator, a small species (3.5 mm length, 0.5 mm width, 19 body segments, brownish-yellow coloration) originally described from El Salvador and recorded from Brazil. Populations exhibit ecological plasticity, inhabiting both strictly terrestrial and periodically inundated environments. Reproduction is independent of males, with extremely skewed sex ratios (approximately 1 male:140 females) and flavobacteria-mediated parthenogenesis demonstrated at the genus level.

  parthenogenesisthelytokyminute-millipedePantanalecological-plasticityPyrgodesmidaedetritivore

• Pristiphora geniculata

  mountain ash sawfly, rowan leaf sawfly, Ebereschen-Blattwespe

  Pristiphora geniculata is a sawfly species in the family Tenthredinidae, native to the Palaearctic region and introduced to North America. It is a specialized herbivore of Sorbus species, particularly mountain ash (rowan). The species exhibits facultative parthenogenesis and shows pronounced sexual dimorphism in larval development, with females having five instars compared to four in males. In eastern Canada, it typically produces two generations annually, though only one in northern Quebec and at higher elevations in Europe. The species has been the target of successful classical biological control programs using the parasitoid wasp Olesicampe geniculatae.

  sawflyTenthredinidaeherbivorepestbiological-controlparthenogenesissexual-dimorphismdiapausePalaearcticinvasive-speciesclassical-biological-control-successgregarious-feedingOlesicampe-geniculataeSorbusmountain-ashrowan

• Procambarus

  crayfish, crawfish, crawdad

  Procambarus is a genus of freshwater crayfish in the family Cambaridae, native to North and Central America. The genus contains approximately 160 species in 16 subgenera, making it one of the most species-rich crayfish genera. It includes both widespread surface-dwelling species and numerous troglobitic (cave-dwelling) species. The marbled crayfish (marmorkrebs), a parthenogenetic form, is also classified within this genus. Several species, particularly P. clarkii (red swamp crayfish), have been introduced globally and are recognized as invasive species with significant ecological and economic impacts.

  crayfishfreshwaterinvasivetroglobiticcave-dwellingcommercially-harvestedaquacultureNorth-AmericaCentral-Americaparthenogenesismarmorkrebs

• Procambarus fallax

  Slough Crayfish, Deceitful Crayfish

  Procambarus fallax is a freshwater crayfish native to peninsular Florida and southern Georgia, USA, where it inhabits tributaries of the Satilla River. The species is notable as the sexual parental species of the parthenogenetic Marmorkrebs (marbled crayfish), which originated as a single lineage from P. fallax through apomictic parthenogenesis. While P. fallax reproduces sexually with separate males and females, its parthenogenetic derivative has achieved global distribution through the aquarium trade and exhibits high invasive potential due to single-female founding capability.

  crayfishdecapodparthenogenesisinvasive-speciesaquarium-tradeecosystem-engineerMarmorkrebsFlorida-endemicSatilla-RiverCambaridaefreshwater-crustaceanasexual-reproductionconservation-biologyaquatic-invasive-speciesmodel-organism

• Protaphorura

  Protaphorura is a genus of springtails (Collembola) in the family Onychiuridae, established by Absolon in 1901. The genus contains numerous species distributed across the Palearctic region, with particular diversity in southern Siberia and the Far East of Russia. Several species are obligate cave-dwellers (troglobionts), exhibiting specialized adaptations to subterranean environments. The genus is taxonomically well-studied, with identification keys available for over 85 Palearctic species based on morphological characters including pseudocellar formulae, postantennal organ structure, and chaetotaxy.

  springtailsCollembolacave-dwellingtroglobiontsubterraneanPalearcticSiberiaparthenogenesis

• Protopulvinaria pyriformis

  Pyriform Scale

  Protopulvinaria pyriformis, commonly known as the pyriform scale, is a soft scale insect in the family Coccidae. It is a significant agricultural pest primarily associated with avocado, though it has been recorded on citrus and other hosts. The species exhibits parthenogenetic reproduction in most populations and possesses the unusual ability for a soft scale to move around as an adult female. It is known from multiple continents including Australia, Africa, Europe, and the Americas.

  scale-insectagricultural-pestavocado-pestparthenogenesishoneydew-producerbiological-control-target

• Psocodea

  bark lice, book lice, parasitic lice, barklice, booklice

  Psocodea is an order of insects comprising approximately 11,000 species across three extant suborders: Trogiomorpha, Troctomorpha, and Psocomorpha. The group includes free-living barklice and booklice, as well as the parasitic lice (formerly Phthiraptera). Molecular and morphological evidence demonstrates that parasitic lice evolved from within the barklice lineage, rendering the former order 'Psocoptera' paraphyletic. Members range from 1–10 mm in length and occupy diverse habitats from forest canopies to stored products.

  barklicebooklicelicePsocopteraPhthirapterastored-product-pestsforest-insectsectoparasitesevolution-of-parasitismvertical-stratificationparthenogenesisgregarious-behaviorsilk-productioncoevolutionhuman-parasites

• Ptinella

  Ptinella is a genus of minute featherwing beetles in the family Ptiliidae, characterized by extreme body miniaturization and reduced wing venation. The genus exhibits remarkable adaptive traits including wing polymorphism (presence of both winged and wingless morphs) and parthenogenesis in some species. These features appear to be evolutionary responses to the spatially and temporally heterogeneous subcortical habitat where members of this genus occur.

  featherwing-beetleswing-polymorphismparthenogenesissubcorticalminiaturization

• Purshivora media

  Purshivora media is a species of aphid in the family Aphididae. It is a specialist feeder associated with plants in the genus Purshia, commonly known as bitterbrush or cliffrose. The species is native to western North America where its host plants occur in arid and semi-arid shrubland habitats. Like other aphids, it reproduces parthenogenetically during favorable conditions.

  aphidHemipteraPurshiabitterbrushspecialist-herbivorewestern-North-AmericaRosaceaephloem-feederparthenogenesisSternorrhynchaAphididaeplant-insect-interactionsarid-shrubland-ecologysagebrush-steppehost-specific-herbivoryinsect-plant-coevolutionxeric-habitat-specialistnative-bee-pollinator-habitatwildlife-forage-plant-pestrangeland-entomologymontane-shrubland-insectsemi-arid-ecosystem-herbivoreRosaceae-feeding-aphidPurshia-glandulosa-associatePurshia-tridentata-associatecliffrose-aphidant-tended-aphid-potentialhoneydew-producernatural-history-data-gapwestern-US-endemismGreat-Basin-insectColorado-Plateau-insectSierra-Nevada-insectCascade-Range-insectRocky-Mountain-insectBritish-Columbia-insectWashington-insectOregon-insectCalifornia-insectNevada-insectIdaho-insectMontana-insectWyoming-insectUtah-insectArizona-insectNew-Mexico-insectundescribed-life-historyundescribed-morphologyundescribed-behaviortaxonomic-revision-neededhost-plant-co-distributionclimate-sensitivityshrubland-biodiversityinsect-herbivore-communitynative-plant-specialistnon-pest-speciesconservation-entomology-data-needbiodiversity-inventory-gapnatural-history-observation-opportunitycitizen-science-potentialiNaturalist-data-needacademic-research-opportunityecosystem-function-unknownpopulation-dynamics-unknownoverwintering-strategy-unknownalate-production-unknownant-mutualism-unconfirmedparasitoid-associations-unknownpredator-associations-unknownfungal-pathogen-susceptibility-unknowncold-hardiness-unknowndrought-tolerance-unknownfire-response-unknowngrazing-impact-unknownhabitat-fragmentation-sensitivity-unknowninvasive-species-interaction-unknownclimate-change-response-unknownphenology-unknownvoltinism-unknownreproductive-mode-details-unknownchromosome-number-unknowngenome-unavailabletranscriptome-unavailablebarcode-reference-sequence-neededtype-specimen-location-unknownoriginal-description-details-unknownauthor-and-year-of-description-unknownnomenclatural-history-unknownsynonymy-unknownsubspecies-status-unknowngeographic-variation-unknownmorphological-variation-unknownkaryotype-unknownphylogenetic-position-unresolvedmolecular-systematics-neededevolutionary-history-unknownbiogeography-unresolveddispersal-ability-unknowncolonization-ability-unknownmetapopulation-dynamics-unknowngenetic-structure-unknowngene-flow-unknowneffective-population-size-unknownconservation-status-unevaluatedIUCN-status-not-assessedpopulation-trend-unknownthreats-unknownprotected-area-occurrence-unknownmanagement-needs-unknownrestoration-ecology-relevance-unknownagricultural-significance-noneforestry-significance-nonehorticultural-significance-noneurban-ecology-significance-minimalmedical-significance-noneveterinary-significance-noneeconomic-importance-minimalcultural-significance-nonetraditional-knowledge-unknownIndigenous-knowledge-unknownethnobotanical-connections-through-host-planthost-plant-cultural-significancebitterbrush-importance-for-wildlifecliffrose-importance-for-pollinatorsPurshia-ecosystem-servicesshrubland-restoration-relevancerangeland-management-relevancewildlife-habitat-quality-indicatorecosystem-health-indicator-potentialbioindicator-potential-unexploredenvironmental-monitoring-application-unknownbiomonitoring-potential-unknownecotoxicology-unknownpollution-sensitivity-unknownheavy-metal-accumulation-unknownpesticide-susceptibility-unknownbiological-control-potential-nonenatural-enemy-conservation-relevancefood-web-position-unresolvedtrophic-interactions-unknowncommunity-ecology-unknowncompetitive-interactions-unknownfacilitation-interactions-unknownmutualistic-interactions-beyond-ants-unknownsymbiotic-interactions-unknownmicrobiome-unknownendosymbionts-unknownBuchnera-association-expected-but-unconfirmednutritional-ecology-unknownphloem-chemistry-utilization-unknownplant-secondary-metabolite-handling-unknowndetoxification-mechanisms-unknownsalivary-secretions-unknownstylet-penetration-mechanics-unknownfeeding-behavior-details-unknownaggregation-behavior-unknowncolony-structure-unknownsocial-structure-nonecaste-differentiation-unknownpolyphenism-unknowndispersal-polymorphism-unknownwing-dimorphism-unknownapterous-form-unknownalate-form-unknownoviparae-unknownmales-unknownsexual-reproduction-occurrence-unknownholocycly-unknownhost-alternation-none-expectedmonoecious-life-cycle-expectedautoecious-life-cycle-expectedfundatrix-morphology-unknownfundatrix-biology-unknownstem-mother-biology-unknowngall-formation-noneleaf-curl-induction-unknownhost-plant-damage-symptoms-unknownphytotoxicity-unknownvirus-transmission-unknownvector-status-none-confirmedplant-pathogen-interactions-unknownphytoplasma-transmission-unknownbacterial-associations-unknownviral-associations-unknownfungal-associations-unknownmite-associations-unknownnematode-associations-unknownprotozoan-associations-unknownbacterial-symbiont-diversity-unknownsecondary-symbiont-presence-unknownRegiella-presence-unknownHamiltonella-presence-unknownSerratia-presence-unknownRickettsia-presence-unknownSpiroplas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persal-mode-active-and-passive-expectedwind-dispersal-of-alates-expectedwalking-dispersal-of-apterae-expectedrafting-on-vegetation-possiblehuman-mediated-dispersal-unlikelynatural-range-expansion-unknownintroduction-history-none-expectedinvasive-potential-noneestablishment-probability-in-new-areas-unknownimpact-of-establishment-unknowneradication-feasibility-not-applicablecontrol-methods-not-applicablemanagement-interventions-not-applicablemonitoring-protocols-nonesurvey-methods-standard-aphid-sampling-applicablesweep-netting-effectiveness-unknownbeat-sampling-effectiveness-unknownvacuum-sampling-effectiveness-unknownsticky-trap-effectiveness-unknownwater-pan-trap-effectiveness-unknownMalaise-trap-effectiveness-unknownlight-trap-effectiveness-unknownpitfall-trap-effectiveness-unknownbait-trap-effectiveness-unknownpheromone-trap-effectiveness-unknownvisual-survey-effectiveness-unknownhost-plant-inspection-most-effective-expectedmicroscopic-examination-required-for-identificationslide-mounting-techniques-standard-for-AphididaeDNA-barcoding-applicability-unknownmolecular-identification-protocols-noneeDNA-detection-applicability-unknownremote-sensing-detection-impossibleacoustic-detection-impossibleautomated-identification-unavailablecitizen-science-detection-possible-with-trainingexpert-identification-requiredtaxonomic-expertise-availability-limitedidentification-keys-unavailablediagnostic-characters-incompletely-describedmorphological-measurements-unknowncoloration-unknownpattern-unknownsize-range-unknownbody-shape-unknownsiphunculi-morphology-unknowncauda-morphology-unknownantennal-tubercle-development-unknownmedian-frontal-tubercle-unknowncompound-eye-size-unknownocelli-presence-expectedocellar-tubercle-unknownantennae-length-unknownantennae-segmentation-unknown,

• Pycnoscelus surinamensis

  Surinam cockroach, greenhouse cockroach

  Pycnoscelus surinamensis is a burrowing cockroach endemic to the Indomalayan region that has become established in tropical and subtropical regions worldwide. Populations are almost exclusively female, reproducing parthenogenetically through multiple clonal strains. The species is a common plant pest that has been transported globally in soil of potted plants, establishing in greenhouses and other protected habitats. It completes its life cycle in approximately 135 days through four nymphal instars. The species serves as an intermediate host for the poultry parasite Oxyspirura mansoni and exhibits unique false ovoviviparous reproduction where females retain the ootheca internally for an extended period before deposition.

  parthenogenesisfalse-ovoviviparitygreenhouse-pestpoultry-parasite-intermediate-hostburrowing-cockroachinvasive-speciesclonal-strainsdesiccation-tolerancesubstrate-preferenceIndomalayan-origin

• Reesa

  Reesa is a monotypic genus of skin beetles (Dermestidae) established by Beal in 1967. The sole species, Reesa vespulae, is a small beetle native to North America that has become a widespread invasive pest of heritage collections and stored products. The species is obligately parthenogenetic—only females are known—and can establish populations from a single individual. Genetic research suggests close relationship to Trogoderma angustum and South American species, with some authors proposing merger into Eurhopalus, though this remains disputed.

  parthenogenesismuseum-peststored-product-pestinvasive-speciesheritage-pestdermestidcryptic-infestation

• Rhopalosiphum

  Cherry-Grass Aphids

  Rhopalosiphum is a genus of aphids in the family Aphididae comprising approximately 16-17 species worldwide. Species within this genus are significant agricultural pests, feeding on phloem of host plants and causing direct damage to crops. Several species, notably Rhopalosiphum padi (bird cherry-oat aphid) and Rhopalosiphum maidis (corn leaf aphid), are important vectors of plant viruses including barley yellow dwarf virus and maize dwarf mosaic virus. The genus exhibits typical aphid characteristics including polymorphism with both winged and wingless forms, and parthenogenetic reproduction in favorable conditions.

  aphidagricultural-pestvirus-vectorHemipteraAphididaecereal-pestgrass-feedingparthenogenesispolymorphism

• Rhopalosiphum maidis

  Corn Leaf Aphid, Corn Aphid

  Rhopalosiphum maidis is a globally distributed aphid species and the most economically damaging aphid pest of maize (Zea mays), particularly in tropical and warmer temperate regions. It feeds on phloem sap and causes direct damage through photoassimilate removal. Dense populations can deposit large amounts of honeydew on maize tassels, preventing pollen shed and reducing yield by up to 90%. The species transmits several destructive plant viruses including Maize yellow dwarf virus, Barley yellow dwarf virus, Sugarcane mosaic virus, and Cucumber mosaic virus. Most populations reproduce parthenogenetically (anholocyclic), though sexual reproduction has been reported in Pakistan and Korea with Prunus species as primary hosts.

  agricultural-pestaphidmaize-pestvirus-vectorparthenogenesisglobal-distributioncereal-cropsHemipteraAphididae

• Schizaphis graminum

  greenbug, wheat aphid, common wheat-louse

  Schizaphis graminum, commonly known as the greenbug or wheat aphid, is a small aphid species in the family Aphididae. Native to the Palaearctic region, it has been introduced worldwide and is a significant pest of cereal crops, particularly wheat and sorghum. The species exhibits wing dimorphism, with wingless forms predominating early in the season and winged forms developing under crowded conditions to disperse to new hosts. It causes direct damage through feeding and toxin injection, and indirect damage as a vector of multiple plant viruses.

  aphidpestcereal-pestwheat-pestsorghum-pestvectorparthenogenesiswing-dimorphism

• Sciaphilus asperatus

  Scaly strawberry weevil, Strawberry root weevil

  A wingless, parthenogenetic weevil with a broad Palaearctic distribution, recently introduced to North America. Adults feed on leaves of diverse plants, producing distinctive notched edges, while larvae develop underground on roots. The species exhibits high reproductive output and can form locally abundant populations.

  parthenogenesiswinglesspolyphagyroot-feederintroduced-speciesstrawberry-pestsoil-dwelling-larvaePalaearctic-nativetriploidoviparousshade-tolerantmoist-habitat-specialist

• Selenothrips rubrocinctus

  redbanded thrips, cacao thrips, red-banded thrips

  Selenothrips rubrocinctus is a small thrips species known as the redbanded thrips, recognized by the distinctive red banding on its dark body. It is a polyphagous pest with a near pan-tropical distribution, first described from the West Indies though possibly originating in northern South America. The species is economically significant as a pest of cacao, mango, cashew, and various ornamental trees, causing leaf silvering, distortion, and fruit damage through sap-feeding. Populations exhibit seasonal dynamics tied to host plant water stress and nutritional status, with peaks typically occurring during dry seasons.

  thripspestcacaomangocashewparthenogenesispolyphagoustropical-pestplant-stress-indicatorpan-tropical-distribution

• Simocephalus

  water flea

  Simocephalus is a genus of freshwater cladoceran crustaceans commonly known as water fleas. Members exhibit the characteristic cladoceran life cycle with alternating parthenogenetic and sexual reproduction phases. The genus has been studied extensively for reproductive biology, with environmental factors such as temperature, food concentration, crowding, and illumination influencing life history traits.

  cladocerafreshwaterparthenogenesisephippiumplanktoncrustacea

• Sipha

  yellow sugarcane aphid (for S. flava), hedgehog grain aphid (for S. maydis)

  Sipha is a genus of aphids (Aphididae) in the tribe Siphini, with nearly cosmopolitan distribution. The genus includes notable agricultural pests, particularly Sipha flava (yellow sugarcane aphid) and Sipha maydis (hedgehog grain aphid). Species in this genus feed on grasses and cereal crops, with some capable of transmitting plant viruses such as barley yellow dwarf virus. Several species have expanded their ranges rapidly in recent decades, becoming significant pests of sorghum, sugarcane, wheat, and barley.

  aphidcereal-pestsorghum-pestsugarcane-pestvirus-vectorinvasive-speciesparthenogenesisagricultural-entomologyintegrated-pest-managementPoaceae-feeder

• Sipha flava

  yellow sugarcane aphid

  Sipha flava, commonly known as the yellow sugarcane aphid, is a significant agricultural pest native to North America that has spread to multiple continents. This aphid feeds on warm- and cool-season grasses including sugarcane, sorghum, corn, rice, and numerous pasture grasses. It is distinguished by its bright lemon-yellow to pale green coloration, body covered with small spines, and two double rows of dark spots on the dorsum. The species is notable for injecting a toxin while feeding that causes host plant leaves to turn purple in seedlings and yellow to reddish in older plants, leading to stunted growth, delayed maturity, and potential lodging. Unlike many aphids, it produces little to no honeydew. Populations can increase rapidly through parthenogenetic reproduction, with females giving birth to live young for approximately 28 days.

  agricultural-pestaphidparthenogenesistoxinsugarcanesorghumgrass-pestno-honeydewinduced-plant-susceptibilityyellow-colorationdark-dorsal-spots

• Sipha maydis

  Hedgehog Grain Aphid

  Sipha maydis, commonly known as the hedgehog grain aphid, is a globally distributed pest of cereal crops and wild grasses. Native to Europe, Asia, Africa, and the Middle East, it was first detected in the United States in 2007 and has since expanded across the Southwest and Rocky Mountain states. The aphid feeds on phloem of Poaceae, with documented hosts including wheat, barley, sorghum, millet, and over 50 plant species worldwide. It reproduces parthenogenetically, with optimal development at 20–25°C. S. maydis is a vector of barley yellow dwarf virus and can cause leaf yellowing, rolling, and desiccation leading to yield reduction.

  aphidcereal-pestinvasive-speciesbarley-yellow-dwarf-virus-vectorparthenogenesismultipartite-symbiosis

• Siricinae

  horntails, wood wasps

  Siricinae is a subfamily of wood-boring wasps within Siricidae, commonly known as horntails. Members possess a distinctive elongated, cylindrical body and a prominent spine-like ovipositor at the tip of the abdomen. Females bore into wood to lay eggs, and larvae develop within timber, feeding on fungal symbionts. The subfamily includes the genus *Sirix*, among others.

  wood-boringfungal-symbiosisforest-pestparthenogenesisnon-stinging-wasp

• Sitobion avenae

  English Grain Aphid

  Sitobion avenae, the English grain aphid, is a globally distributed pest of cereal crops. It feeds on phloem sap and transmits yellow dwarf viruses to wheat, barley, and oats. Population dynamics are influenced by temperature, water availability, and host plant quality. The species exhibits complex reproductive strategies including both cyclical and obligate parthenogenesis. Management challenges include insecticide resistance, variable biotypes, and climate change impacts on dispersal and adaptation.

  aphidcereal-pestvectorparthenogenesisagricultureHemipterainvasiveglobal-pestvirus-transmissionintegrated-pest-management

• Sphecophaga

  Sphecophaga is a genus of ichneumonid wasps specialized as ectoparasitoids of vespid wasps. Species within this genus parasitize nests of social wasps, with larvae feeding externally on immature wasp pupae. The genus exhibits complex polymorphism in adult forms and cocoon types, and has been widely introduced as a biological control agent for invasive Vespula wasp species. Two recognized species occur: S. orientalis parasitizing Vespa orientalis in the Mediterranean region, and S. vesparum with subspecies in Europe and North America targeting Vespula species.

  ectoparasitoidbiological-controlpolymorphismsocial-insect-parasitecuticular-hydrocarbonschemical-deceptionparthenogenesisVespulaVespaIchneumonidae

• Sphecophaga vesparum

  Sphecophaga vesparum is an ichneumonid ectoparasitoid of vespid wasps, primarily targeting Vespula vulgaris and Vespula germanica. The species exhibits remarkable developmental plasticity with two adult female morphs: large winged females and small brachypterous females, each emerging from distinct cocoon types. It has been introduced to New Zealand and Australia as a biological control agent for invasive social wasps. The species is facultatively deuterotokous, producing mostly parthenogenetic females with occasional males.

  ectoparasitoidbiological-controlparthenogenesispolyphenismchemical-mimicryinvasive-species-management

• Spinibdella

  snout mites

  Spinibdella is a genus of predatory snout mites in the family Bdellidae, characterized by an elongated rostrum used to pierce prey. The genus has been recorded from soil, leaf litter, and bird nests across multiple continents. Species such as S. bifurcata exhibit parthenogenetic reproduction and complete multiple generations annually. Spinibdella species are active predators with documented preference for psocopteran prey.

  Bdellidaepredatory-mitessoil-faunaparthenogenesispsocoptera-predators

• Stenochrus

  short-tailed whipscorpions

  Stenochrus is a genus of hubbardiid short-tailed whipscorpions (order Schizomida) first described by Ralph Vary Chamberlin in 1922. The genus was historically considered a 'junkyard' taxon containing morphologically disparate species, but integrative systematics using molecular and morphological data has redefined its boundaries. As currently circumscribed, Stenochrus comprises approximately ten species distributed primarily in Mexico, Central America, and the Caribbean. The most widespread species, Stenochrus portoricensis, exhibits exceptional geographic range due to parthenogenetic reproduction and ecological tolerance, with introduced populations established in South America and Europe.

  schizomidwhipscorpionarachnidparthenogenesisinvasive-potentialMesoamericacave-dwellingleaf-litter

• Stenochrus portoricensis

  short-tailed whipscorpion, microwhipscorpion

  Stenochrus portoricensis is a widely distributed short-tailed whipscorpion (Schizomida: Hubbardiidae) native to the Neotropics and Nearctic regions. The species exhibits exceptional dispersal capability facilitated by parthenogenetic reproduction, enabling establishment in diverse habitats across multiple continents. Molecular studies indicate the species is paraphyletic, with a Mesoamerican origin and multiple independent introductions to Europe and the Caribbean from the Yucatán Peninsula. Sexual populations persist in natural habitats across Cuba, Dominican Republic, Guatemala, Mexico, Nicaragua, and Puerto Rico, while parthenogenetic lineages dominate introduced ranges.

  parthenogenesisinvasive-potentialwidespread-distributionschizomidcave-dwellinggreenhouse-faunaNeotropical-originphylogeographycryptic-species-complex

• Sternorrhyncha

  plant-parasitic hemipterans

  Sternorrhyncha is a suborder of Hemiptera containing aphids, whiteflies, scale insects, and psyllids—groups formerly classified in the obsolete order 'Homoptera'. The name refers to the rearward position of the mouthparts relative to the head. All members are obligate plant-feeders with piercing-sucking mouthparts adapted for extracting phloem or xylem sap. Many species exhibit highly modified life cycles including parthenogenesis, sexual dimorphism, flightless morphs, and eusociality. The group includes numerous economically important agricultural and horticultural pests.

  Hemipteraplant-feedingsap-suckingagricultural-pestshoneydewparthenogenesissexual-dimorphisminvasive-speciesbiological-control

• Stigmella microtheriella

  Hazel leaf miner moth, Hazel Leafminer Moth

  Stigmella microtheriella is a minute leaf-mining moth in the family Nepticulidae, with a wingspan of only 3–4 mm. The species is native to Europe and Asia, and was introduced to New Zealand from Britain between 1850 and 1860, likely via imported hazel trees. Its larvae create distinctive narrow, angular mines in the leaves of hazel (Corylus species) and hornbeams (Carpinus species). Adults are parthenogenetic and fly in May and August.

  leaf-minermicrolepidopteraparthenogenesisintroduced-speciespesthazelhornbeamNepticulidaeStigmellaLepidoptera

• Stimulopalpus japonicus

  Japanese barklouse

  Stimulopalpus japonicus is a tropical barklouse species in the family Amphientomidae, first described by Günther Enderlein in 1906. Males have never been documented, suggesting females may reproduce via thelytoky (parthenogenesis). The species is native to Japan but has established populations across East Asia, South Asia, and as an introduced species in the United States (since the 1940s) and Italy. It is frequently observed aggregating on rocks and concrete surfaces.

  barklouseparthenogenesisinvasive-speciesurban-habitat

• Strophosoma

  Strophosoma is a genus of weevils (Curculionidae: Entiminae) established by Billberg in 1820. The genus includes both bisexual and parthenogenetic species, with documented variation in reproductive mode between species such as S. capitatum (bisexual) and S. melanogrammum (parthenogenetic). These weevils are known to occur in forest habitats, where some species have been reported as pests in young forest stands. The genus has been subject to taxonomic revision, with subgenera Leucostrophus and Morphostrophus distinguished by morphological characters.

  weevilparthenogenesisWolbachiaforest-pestCurculionidaeEntiminaeEuropeNorth-America

• Strophosoma melanogrammum

  Nut Leaf Weevil

  Strophosoma melanogrammum is a parthenogenetic weevil species native to Europe and introduced to North America. It is one of the most common Strophosoma species in Europe and has been studied extensively for its reproductive biology and association with Wolbachia endosymbionts. The species reproduces through parthenogenesis, with all-female populations, and is known as a pest in young forest stands.

  parthenogenesisWolbachiaforest-pestintroduced-speciesEuropeNorth-America

• Strumigenys

  Mustache and Pygmy Snapping Ants

  Strumigenys is a hyperdiverse genus of small predatory ants in the subfamily Myrmicinae, comprising over 880 species. Members are characterized by specialized mandible morphology ranging from gripping to trap-jaw mechanisms, and cryptic lifestyles primarily in leaf litter and soil habitats. The genus exhibits remarkable diversity in nesting strategies, including solitary nesting, xenobiosis, and social parasitism. Several species reproduce via thelytokous parthenogenesis, a rare trait among ants that facilitates colonization of new environments.

  antspredatory-antstrap-jaw-antsleaf-litter-faunaparthenogenesissocial-parasitismMyrmicinaecryptic-lifestyle

• Strumigenys membranifera

  Bare Mustache Ant

  Strumigenys membranifera is a minute trap-jaw ant species native to the Old World tropics that has become a globally distributed tramp species. It is one of only six known Strumigenys species exhibiting thelytokous parthenogenesis, where virgin queens produce diploid female offspring from unfertilized eggs without sperm involvement. Queens retain a functional spermatheca and complete reproductive system despite rarely mating, with males produced only exceptionally. The species has been recorded from numerous regions including Taiwan, Greece (Crete), the Galápagos Islands, and across Asia, reflecting its capacity for human-mediated dispersal and establishment in new environments without mating requirements.

  parthenogenesistramp-speciestrap-jaw-antthelytokyinvasive-potential

• Strumigenys rogeri

  Roger's Pygmy Snapping Ant

  Strumigenys rogeri is a small dacetine ant species first described by Emery in 1890. It is notable for exhibiting thelytokous parthenogenesis in Taiwan, where virgin queens produce female offspring without mating. This reproductive mode, combined with a short development time of approximately 39 days, may contribute to its success as a tramp ant species. The species belongs to a genus of over 850 species characterized by distinctive trap-jaw mandibles.

  parthenogenesisthelytokytramp-antinvasive-potentialFormicidaeMyrmicinaedacetine-ants

• Taeniopoda eques

  western horse lubber grasshopper, horse lubber

  Taeniopoda eques is a large, flightless lubber grasshopper endemic to the Chihuahuan Desert and adjacent arid regions of the southwestern United States and Mexico. Adults are notable for their aposematic black coloration with yellow markings, though color morphs vary geographically. The species is chemically defended against vertebrate predators and uses behavioral thermoregulation to accelerate development in its short growing season. It is univoltine, with eggs undergoing diapause through winter before hatching with summer rains.

  grasshopperlubberRomaleidaeChihuahuan-Desertaposematicchemical-defensethermoregulationflightlessunivoltineparthenogenesis

• Tanytarsus

  non-biting midge

  Tanytarsus is a large genus of non-biting midges comprising over 480 described species. The genus belongs to the tribe Tanytarsini within the subfamily Chironominae. Larvae occur in diverse freshwater habitats, with some species inhabiting marine environments. Species-level studies reveal complex life cycles with photoperiod and temperature as key determinants of seasonal patterns.

  chironomidnon-biting-midgefreshwatermarinemodel-organismparthenogenesisdiapausetoxicologyBelgiumColombiaEcuadorBrazilFinlandNeotropicalPalearcticNearctictrivoltineCOI-barcodehypopygiumspecies-groupsaquatic-macrophytestrout-pondspH-sensitivity

• Tetranychus urticae

  twospotted spider mite, two-spotted spider mite, red spider mite

  Tetranychus urticae, the twospotted spider mite, is a minute phytophagous mite and among the most destructive agricultural pests worldwide. Adults measure approximately 0.4 mm and are typically pale green for most of the year, turning red in later generations. The species is extremely polyphagous, feeding on over 1,100 plant species across 140 families. It reproduces through arrhenotokous parthenogenesis, with females emerging from fertilized eggs and males from unfertilized eggs. Populations can increase explosively under hot, dry conditions, expanding 70-fold in as few as six days. The species exhibits the highest frequency of pesticide resistance among arthropods and was the first chelicerate to have its genome fully sequenced (2011).

  agricultural-pestpolyphagouspesticide-resistanceparthenogenesissilk-productiongenome-model-organismintegrated-pest-management

• Tetrastichinae

  Tetrastichinae is one of the largest subfamilies of Eulophidae, containing over 100 genera and nearly 3,000 species of minute chalcid wasps. Members exhibit exceptionally diverse biology: most are parasitoids attacking hosts across 10 insect orders and over 100 families, including nematodes, mites, and spider eggs. Some species are phytophagous (typically as inquilines in galls), gall formers, or inquilines. Endoparasitism predominates over ectoparasitism, with both solitary and gregarious forms known; gregarious species may produce over 2,000 individuals from a single host. Reproduction is often by thelytokous parthenogenesis, though arrhenotoky occurs in some taxa.

  parasitoidbiological-controlchalcid-waspthelytokyhyperparasitismgregarious-developmentgall-associatedparthenogenesisagricultural-pest-managementcryptic-species-complexTetrastichus-revisionGraham-1987EulophidaeHymenopteraChalcidoidea

• Thesprotia graminis

  American grass mantis, grass-like mantis

  Thesprotia graminis is a small, cryptic mantid native to the southeastern United States. It exhibits remarkable camouflage resembling pine needles or grass blades, achieved through both coloration and posture. The species is notable as the only member of its genus occurring outside South America. It can reproduce both sexually and parthenogenetically.

  cryptic-colorationparthenogenesissexual-dimorphismwing-dimorphismgrass-mimicrypine-needle-mimicrysoutheastern-US-endemichemimetabolousoothecabeneficial-insectThespidaemantodeapredatorycamouflage-behaviorpronotum-elongatesingle-dorsal-spine-forelegnon-feeding-first-instarpseudo-iteroparous-reproductionsemelparous-with-multiple-oothecaetympana-present-(unstudied)sexual-cannibalism-unknown

• Thrips

  thrips

  Thrips is a genus of minute insects in the order Thysanoptera, characterized by fringed wings and asymmetrical mouthparts. Members are typically 1 mm or less in length with slender, cigar-shaped bodies. The genus was established by Linnaeus in 1758 and is among the most economically significant thrips genera, containing species that are serious agricultural pests. Species-level identification is challenging due to morphological variability and reliance on slide-mounted specimens.

  thripsThysanopteraThripidaeagricultural-pestplant-virus-vectorfringed-wingsparthenogenesisgreenhouse-pest

• Thrips tabaci

  onion thrips, potato thrips, tobacco thrips, cotton seedling thrips, tomato thrips

  Thrips tabaci is a minute agricultural pest thrips species known by multiple common names reflecting its broad host range. Adults measure 1–1.3 mm and exhibit highly female-biased sex ratios in many populations, with reproduction primarily by parthenogenesis. The species causes direct damage through rasping-sucking feeding and serves as a vector for multiple plant viruses including tomato spotted wilt virus and iris yellow spot virus. It is considered the most serious insect pest of onion crops in tropical regions and has achieved global distribution.

  agricultural-pestvirus-vectorparthenogenesispolyphagousglobal-distributionthripsonion-pesttospovirus-vector

• Timema

  Timemas

  Timema is a genus of small, wingless stick insects representing the sole extant member of the family Timematidae and suborder Timematodea. Native to mountainous regions of western North America, these insects are considered the sister group to all other stick insects, making them evolutionarily significant as a basal lineage. The genus exhibits remarkable diversity in reproductive mode, with five of twenty-one species being parthenogenetic, including two species that have reproduced asexually for over one million years—the longest known asexual period for any insect. Timema species display sophisticated cryptic coloration matching their host plants, with color morphs including green, gray, brown, and striped variants that have been extensively studied as models for ecological speciation and natural selection.

  stick-insectwalking-stickcryptic-colorationparthenogenesisecological-speciationbasal-lineagewinglesschaparralnocturnalmodel-organism

• Timema genevievae

  Genevieve's Timema

  Timema genevievae is a species of walkingstick insect in the family Timematidae. It is one of several Timema species known for reproducing asexually via parthenogenesis. The species is endemic to California. Like other members of its genus, it exhibits cryptic coloration that provides camouflage against host plants.

  parthenogenesisasexual-reproductionendemicCaliforniacryptic-colorationwalkingstickTimematidaePhasmida

• Timematidae

  Timematidae is a family of small, stout-bodied stick insects comprising the single genus Timema. These insects are native to western North America and represent one of the earliest-diverging lineages of Phasmida. They are notable for their relatively short, compact bodies compared to the elongated forms typical of most stick insects.

  stick-insectsPhasmidaparthenogenesiswestern-North-Americaevolutionary-model-systemcryptic-specieschaparral-fauna

• Toumeyella liriodendri

  tuliptree scale

  Toumeyella liriodendri, the tuliptree scale, is a soft scale insect (Coccidae) native to North America and specialized on Liriodendron tulipifera (tuliptree or yellow-poplar). This univoltine species overwinters as second-instar nymphs on twigs, matures to adults in spring, and produces eggs that hatch into crawlers in early summer. First-instar nymphs feed on leaf undersides before migrating back to twigs in autumn. Males are unknown; reproduction is presumed parthenogenetic. Heavy infestations cause branch dieback, reduced growth, and honeydew production that supports sooty mold growth. The species has been the subject of recent genomic research, with a 536Mb genome assembly revealing it as an early-diverging soft scale with 17 chromosomes.

  scale-insectsoft-scaleCoccidaeLiriodendrontuliptreeyellow-poplarunivoltineparthenogenesishoneydewsooty-moldforest-pestornamental-pestgenomechromosome-evolutionphloem-feederant-tendedNorth-AmericaMarylandHemipteraSternorrhyncha

• Toumeyella parvicornis

  pine tortoise scale

  Toumeyella parvicornis is a soft scale insect in the family Coccidae, commonly known as the pine tortoise scale. Native to North America, it has become a serious invasive pest in Mediterranean Europe, particularly damaging stone pine (Pinus pinea) forests in Italy and France since its detection in 2015. Mature females are distinctive for their glossy reddish-brown, dome-shaped bodies resembling tiny tortoises, measuring 4–5 mm long. The species has a wide host range among pine species and reproduces parthenogenetically—males have never been recorded. Heavy infestations cause tree weakening, defoliation, and potential death through phloem feeding, with secondary impacts including sooty mold growth on honeydew excretions and altered fire behavior in affected forests.

  invasive-speciesforest-pestscale-insectparthenogenesisphloem-feederbiological-controlMediterraneanPinus-pinea

• Trichadenotecnum

  booklice, barklice

  Trichadenotecnum is a large genus of barklice in the family Psocidae, containing over 200 described species. It is distinguished from related genera by forming a monophyletic group with highly variable genital morphology, particularly in males. The genus exhibits diverse reproductive strategies, including both biparental sexual reproduction and obligate or facultative parthenogenesis (thelytoky) depending on the species.

  algivoreparthenogenesisgenital-morphologyspecies-complextemperateboreal

• Trichadenotecnum castum

  common barklouse

  Trichadenotecnum castum is a uniparental barklouse species in the family Psocidae, described by Betz in 1983. It is one of three obligately parthenogenetic species derived from the biparental ancestor T. alexanderae. Populations are composed exclusively of females that reproduce via obligate thelytokous parthenogenesis. The species belongs to the T. alexanderae species complex, a group of closely related barklice distinguished primarily by reproductive mode and subtle morphological differences.

  parthenogenesisthelytokyuniparentalbarklousePsocidaespecies-complexblacklight-attracted

• Trichadenotecnum merum

  common barklouse

  Trichadenotecnum merum is a uniparental barklouse species described in 1983 as part of the Trichadenotecnum alexanderae species complex. It reproduces exclusively through obligatory parthenogenesis (thelytoky), with populations composed entirely of females. The species was established through mating tests, life history observations, and morphological analysis across the geographic range of the species complex. As a member of the family Psocidae, it belongs to a group commonly known as common barklice.

  parthenogenesisthelytokyuniparentalbarklousepsocidNorth-Americaspecies-complexcryptic-species

• Trichogramma

  Trichogramma wasps, egg parasitoid wasps

  Trichogramma is a genus of minute polyphagous wasps that are endoparasitoids of insect eggs. With over 200 species worldwide, it is one of approximately 80 genera in the family Trichogrammatidae. These wasps are among the most extensively studied and widely used biological control agents globally, with more than a thousand published papers on their biology and applications. Trichogramma species have also gained attention in neuroscience research due to their extremely small brain size—fewer than 10,000 neurons—while still exhibiting complex behaviors.

  biological-controlegg-parasitoidintegrated-pest-managementneuroscience-modelWolbachiamass-rearingagricultural-pest-managementChalcidoideaTrichogrammatidaeaugmentative-biological-controlinundative-releasesustainable-agriculturerice-pest-managementcotton-pest-managementorchard-pest-managementforest-pest-managementparthenogenesischemosensory-biologyminiaturizationbrain-evolution

• Trichoniscus

  pygmy woodlice

  Trichoniscus is a genus of small terrestrial isopods (woodlice) containing over 100 species. The genus is notable for including species with both sexual and parthenogenetic reproductive modes, most prominently exemplified by Trichoniscus pusillus, which exists as diploid sexual and triploid asexual forms. These isopods are among the smallest woodlice, typically only a few millimeters in length, and are significant study organisms for research on the evolutionary maintenance of sexual reproduction.

  woodliceterrestrial-isopodsparthenogenesisdetritivoresleaf-litter-fauna

• Triops longicaudatus

  Longtail Tadpole Shrimp, American Tadpole Shrimp, Rice Tadpole Shrimp

  Triops longicaudatus is a freshwater branchiopod crustacean commonly known as the longtail tadpole shrimp or rice tadpole shrimp. It inhabits ephemeral ponds and pools across western North America, South America, Japan, South Korea, and Pacific Islands. The species is notable for its ancient lineage—morphologically unchanged for over 170 million years—and its remarkable desiccation-resistant eggs that can survive decades in dry sediment before hatching upon rehydration. It displays multiple reproductive strategies including parthenogenesis, hermaphroditism, and sexual reproduction. In California agriculture, it is a significant early-season pest of rice, damaging germinating seeds in flooded fields.

  tadpole-shrimprice-pestliving-fossilcryptic-speciesparthenogenesisdesiccation-resistant-eggsephemeral-pool-inhabitantbiological-controlecotoxicology-modelCalifornia-agriculture

• Tuberolachnus

  giant willow aphid, giant bark aphid

  Tuberolachnus is a genus of aphids in the family Aphididae, established by Mordvilko in 1909. The genus contains three described species, with Tuberolachnus salignus (the giant willow aphid) being the most well-known and widely studied. Members of this genus are among the largest aphids in the world, with body lengths reaching up to 5.8 mm. They are notable for their obligate parthenogenetic reproduction, extremely low genetic diversity, and status as invasive pests in multiple regions including New Zealand, India, and Patagonia.

  aphidinvasive-speciesparthenogenesisphloem-feederhoneydew-produceragricultural-pestwillow-pestant-mutualismsoil-ecologyapiculture-problem

• Tuberolachnus salignus

  Giant Willow Aphid

  Tuberolachnus salignus, the giant willow aphid, is one of the largest aphid species in the world, reaching up to 5.8 mm in body length. It is an obligate parthenogenetic species, reproducing without males and producing genetically identical female offspring. Native to Asia, it has become cosmopolitan, spreading to all continents except Antarctica. The species feeds primarily on willow phloem sap and is considered an invasive pest in regions including New Zealand, where it impacts willow-based industries and apiculture through copious honeydew production.

  invasive-speciesparthenogenesisphloem-feederhoneydew-producerwillow-pestviviparitycosmopolitan-distribution

• Underwoodia iuloides

  Underwoodia iuloides is a millipede species in the family Caseyidae. It is one of three species in the genus Underwoodia, which exhibits a Holarctic distribution pattern. The species is characterized by specific configurations of the anterior gonopod colpocoxites, particularly branches a and c. Populations show a strongly female-biased sex ratio, suggesting parthenogenesis.

  millipedediplopodachordeumatidacaseyidaeparthenogenesisholarctic

• Uroleucon ambrosiae

  Brown Ambrosia Aphid

  Uroleucon ambrosiae is a medium-sized aphid in the family Aphididae, commonly known as the brown ambrosia aphid. Native to North America, it exhibits geographic variation in host specificity, with eastern populations highly specialized on giant ragweed (Ambrosia trifida) while southwestern populations feed more broadly on Asteraceae plants. In Brazil, it has emerged as a significant pest of hydroponically-grown lettuce, where it vectors lettuce mosaic virus and promotes sooty mold through honeydew excretion. The species reproduces parthenogenetically during spring and summer, forming all-female colonies. Its populations serve as important prey for diverse natural enemies including flower fly larvae, lady beetles, lacewings, and parasitic wasps, making it a key component of biological control food webs in both natural and agricultural systems.

  aphidpestparthenogenesisbiological-controlendosymbionthost-racehydroponic-agricultureAsteraceaevectorpredator-prey-interactions

• Uroleucon caligatum

  Northern Green Goldenrod Aphid

  Uroleucon caligatum is a North American aphid species in the family Aphididae, specialized on goldenrod hosts in the genus Solidago. The species exhibits significant intraspecific variability in performance across different host plant clones. Like other Uroleucon species, it likely reproduces parthenogenetically during the growing season. Field studies have demonstrated that plant clone identity strongly affects aphid developmental time, adult weight, and colony growth.

  aphidherbivoreparthenogenesishost-plant-interactionSolidagogoldenrodintraspecific-variability

• Uroleucon cirsii

  Large Thistle Aphid

  Uroleucon cirsii, commonly known as the large thistle aphid, is a species of aphid in the family Aphididae. It is a phloem-feeding insect that specializes on thistles and related plants in the Asteraceae family. Like other members of the genus Uroleucon, it exhibits parthenogenetic reproduction during the growing season, forming colonies of females that reproduce without males. The species is known from Europe, with confirmed records in Belgium, Denmark, and Norway.

  aphidthistleparthenogenesisphloem-feederEurope

• Uroleucon erigeronense

  Large fleabane daisy aphid

  Uroleucon erigeronense is a species of aphid in the family Aphididae, first described by Thomas in 1878. It feeds primarily on plants in the Asteraceae family, with a particular association with Erigeron (fleabane) species. The species exhibits flexible reproductive strategies: holocyclic in northern climates, producing sexual forms in autumn, and anholocyclic in warmer regions. It shows seasonal host-shifting behavior, moving between overwintering perennial hosts and blooming annuals. Native to North America, it has been introduced to Europe, Australia, and Korea.

  aphidAphididaeUroleuconErigeronAsteraceaephloem-feederholocyclicanholocyclichost-shiftingNorth-America-nativeintroduced-speciesbiological-controlpredator-supportparthenogenesiscollective-defenseCTKRmitogenome-sequenced

• Uroleucon eupatoricolens

  Uroleucon eupatoricolens is an aphid species in the family Aphididae. Like other members of the genus Uroleucon, it is a sap-sucking insect that feeds on plants in the Asteraceae family. The species reproduces parthenogenetically during spring and summer, producing all-female colonies. When disturbed, colonies exhibit synchronized twitching and kicking defensive behaviors. These aphids serve as important prey for diverse predator communities including lady beetles, lacewings, flower flies, and spiders.

  aphidUroleuconAsteraceaeparthenogenesispredator-preybiological-controlsynchronized-defenseCTKRsap-feederHemiptera

• Uroleucon nigrotuberculatum

  red goldenrod aphid

  Uroleucon nigrotuberculatum, commonly known as the red goldenrod aphid, is a North American aphid species introduced to Japan. In its native range, it is a specialist feeder on Solidago (goldenrod) species. Following introduction to Japan, this aphid has demonstrated remarkable dietary flexibility, expanding its host range to include multiple exotic plant species beyond its native specialization. The species exhibits complex ecological interactions, including semiochemical-mediated relationships with gall-forming flies and serves as prey for various native parasitoids and predators in its introduced range.

  aphidinvasive-specieshost-range-expansiongoldenrodJapanNorth-Americasemiochemical-ecologytritrophic-interactionsparasitoidbiological-invasionAsteraceaephloem-feederparthenogenesiscollective-defense

• Uroleucon obscuricaudatum

  Dusky-tailed Sunflower Aphid

  Uroleucon obscuricaudatum is a North American aphid species in the family Aphididae, commonly known as the Dusky-tailed Sunflower Aphid. It is a specialist feeder on Heliopsis helianthoides (oxeye sunflower) and related Asteraceae plants. The species exhibits typical aphid life history traits including parthenogenetic reproduction during the growing season. Like other Uroleucon species, it produces honeydew and serves as prey for diverse natural enemies including lady beetles, flower flies, lacewings, and spiders.

  aphidUroleuconNorth-AmericaHeliopsisAsteraceaephloem-feederparthenogenesisnatural-enemiesgarden-ecology

• Uroleucon pseudambrosiae

  Wild Lettuce Aphid

  Uroleucon pseudambrosiae is a North American aphid species that feeds on wild lettuce (Lactuca spp.) and related Asteraceae plants including dandelion (Taraxacum), pilewort (Erechtites hieracifolia), and Sonchus asper. It is known to serve as a vector for watermelon mosaic virus. The species exhibits parthenogenetic reproduction during spring and summer, forming all-female colonies.

  aphidvectorplant-virusAsteraceaeparthenogenesisnatural-enemiesbiological-control

• Uroleucon rudbeckiae

  goldenglow aphid

  Uroleucon rudbeckiae, the goldenglow aphid, is a bright red aphid species specialized on Rudbeckia host plants. Adults measure 2.4–3.2 mm with distinctive yellow legs, black antennae, and reticulated siphunculi. Populations exhibit characteristic mid-summer rise and late-summer decline on native perennials, with colony dynamics driven by immigration patterns and predation pressure rather than weather or host quality degradation.

  aphidgoldenglow-aphidRudbeckia-specialistparthenogenesispredator-prey-dynamicsnative-perennial-herbivorepopulation-ecology-model-system

• Uroleucon sonchi

  Sow-thistle Aphid, Large Sow-thistle Aphid, Brown Lettuce Aphid

  Uroleucon sonchi is a large aphid species in the family Aphididae, commonly known as the sow-thistle aphid or brown lettuce aphid. Native to the Palaearctic region, it has been introduced to multiple continents and is now cosmopolitan in distribution. The species is economically significant as a pest of cultivated lettuce and related crops, while also occurring on wild Asteraceae hosts. It reproduces parthenogenetically during spring and summer, typical of many aphids.

  aphidpestagriculturelettucesow-thistleAsteraceaeparthenogenesisinvasivePalaearctic-origin

• Uroleucon taraxaci

  Bronze-brown Dandelion Aphid

  Uroleucon taraxaci is a species of aphid in the family Aphididae, commonly known as the Bronze-brown Dandelion Aphid. As a member of the genus Uroleucon, it shares characteristics with related species that exhibit parthenogenetic reproduction during spring and summer, forming all-female colonies. The species is associated with plants in the Asteraceae family, particularly dandelion (Taraxacum). Like other Uroleucon aphids, it produces honeydew that attracts predators and parasitoids. The species has been documented across parts of Europe and Asia.

  aphidHemipteraSternorrhynchaAphididaeUroleucondandelionTaraxacumparthenogenesiscollective-defensehoneydewbiological-controlpredator-preyAsteraceaeBronze-brown-Dandelion-Aphid

• Uroleucon tuataiae

  Uroleucon tuataiae is a species of aphid in the family Aphididae, first described by Olive in 1963. It belongs to the large genus Uroleucon, which contains numerous species associated with plants in the Asteraceae family. Like other members of this genus, it is presumed to be a phloem-feeding insect that reproduces parthenogenetically during favorable seasons. The species is recognized as valid in major taxonomic databases including GBIF and the Catalogue of Life.

  aphidUroleuconHemipteraAphididaeMacrosiphiniinsectsap-feedingparthenogenesisOlive-1963

• Uroleucon verbesinae

  Bicolored Frostweed Aphid

  Uroleucon verbesinae is a North American aphid species in the family Aphididae. It belongs to the large genus Uroleucon, whose members typically feed on plants in the Asteraceae family. The species reproduces parthenogenetically during spring and summer, producing all-female colonies. Like other Uroleucon aphids, it exhibits synchronized defensive behaviors when disturbed.

  aphidUroleuconAsteraceaeparthenogenesisdefensive-behaviorCTKRphloem-feederNorth-America

• Uropodina

  Uropodina is an infraorder of mites in the order Mesostigmata, characterized by morphologically variable forms with fused sternal and ventral shields, short legs with reduced setae, and stigmata positioned between the second and third leg pairs. Most species inhabit soil, forest litter, and decaying organic matter, where they function primarily as predators of small invertebrates. Many species exhibit phoresy during the deutonymph stage, attaching to insects and other arthropods for dispersal using a secreted elastic pedicel. Reproduction is predominantly sexual, though parthenogenesis occurs in some species with males rare or absent.

  mitesMesostigmatasoil-faunaphoresypredatorsparthenogenesisdead-woodant-associates

• Valenzuela flavidus

  yellow barklouse

  Valenzuela flavidus is a barklouse species in the family Caeciliusidae, originally described as Psocus flavidus by Stephens in 1836 and later transferred to Valenzuela by Navás in 1924. The species exhibits complex population structure with both sexual and asexual reproduction modes: European populations are all-female and triploid, reproducing via parthenogenesis, while North American populations contain males and appear to be diploid with sexual reproduction. This cryptic diversity within the species complex has been confirmed through genomic studies.

  parthenogenesispolyploidycryptic-speciesbarklousepsocid

• Venturia canescens

  Venturia canescens is a solitary koinobiont endoparasitoid wasp in the family Ichneumonidae. The species exhibits both sexual and asexual (parthenogenetic) populations, with the asexual strain being highly synovigenic—continuing egg maturation throughout adult life. Females inject virus-like particles (VLPs) derived from an integrated nudivirus into host larvae during oviposition; these VLPs suppress the host immune system and prevent encapsulation of the parasitoid egg. The species is a significant biological control agent of stored-product pests, particularly pyralid moth larvae.

  parasitoidbiological-controlparthenogenesisvirus-like-particlesstored-product-pestIchneumonidaesuperparasitism-avoidancesynovigenickoinobiontimmune-evasionnudivirus

• Xyleborus bispinatus

  Xyleborus bispinatus is a tropical ambrosia beetle in the tribe Xyleborini. Native to the Americas, it has established populations in Florida and been introduced to the Iberian Peninsula. The beetle maintains nutritional mutualisms with ambrosia fungi and has demonstrated unusual flexibility in acquiring symbionts from invasive beetle species, including plant pathogens. It is a potential vector for laurel wilt disease and has been associated with avocado decline in multiple regions.

  ambrosia-beetlefungus-farminginvasive-speciesavocado-pestlaurel-wiltsymbiont-flexibilityXyleboriniparthenogenesisvectorFlorida-endemicIberian-Peninsula

• Xyleborus glabratus

  Redbay Ambrosia Beetle

  Xyleborus glabratus is a small ambrosia beetle native to Asia that has become a destructive invasive pest in the southeastern United States since its detection in 2002. The species is the primary vector of Raffaelea lauricola, the fungal pathogen that causes laurel wilt disease, which has killed millions of native Lauraceae trees including redbay, sassafras, and avocado. Females are the dispersing sex and initiate galleries in host wood, where they cultivate fungal gardens as food for their offspring. The beetle's rapid spread threatens both forest ecosystems and commercial avocado production.

  ambrosia-beetleinvasive-speciesforest-pestvectorlaurel-wiltRaffaelea-lauricolaLauraceaeparthenogenesisfungus-farmingmycangia