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Aeoloplides turnbulli
thistle grasshopper, Russian thistle grasshopper, saltbush grasshopper
Aeoloplides turnbulli is a medium-sized, robust spur-throated grasshopper in the family Acrididae, commonly known as the thistle grasshopper or Russian thistle grasshopper. The species exhibits two recognized subspecies: A. t. turnbulli in the north and A. t. bruneri in the south, distinguished primarily by wing length. It is an early-hatching species with a prolonged nymphal development period of 50–60 days. The species has demonstrated outbreak potential, with historical population irruptions documented in western Kansas during the 1930s and in the Big Horn Basin, Wyoming, in 1993.
grasshopper spur-throated chenopod-specialist early-hatching economic-pest beneficial-insect subspecies-dimorphism wing-polymorphism phytophilous Big-Horn-Basin western-Kansas-outbreak Melanoplinae
Aeropedellus clavatus
Club-horned Grasshopper, Clubhorned Grasshopper, Slant-faced Grasshopper
Aeropedellus clavatus, commonly known as the club-horned grasshopper, is a medium-sized slant-faced grasshopper in the family Acrididae. It is distinguished by its club-shaped antennae, with the last six segments enlarged and darker than the rest. The species exhibits pronounced sexual dimorphism: females are flightless with short wings, while males may have either short or long wings, with long-winged males capable of flight. It is one of the earliest-hatching grasshoppers in its range, emerging in early spring and completing development rapidly. Populations are most abundant in the Canadian prairies, where it is the most widely distributed grassland grasshopper species.
grasshopper slant-faced early-hatching sexual-dimorphism wing-polymorphism prairie alpine pest Gomphocerinae
Agonum retractum
A wing polymorphic ground beetle found in aspen woodlands of the Canadian Rockies and across North America. Females exhibit both short-winged and long-winged morphs, with the long-winged form capable of flight until reproduction triggers flight muscle atrophy. Males are predominantly short-winged. The species has been studied for its role in chemical cycling within forest ecosystems and its population biology in stable, non-migratory populations.
Carabidae ground-beetle wing-polymorphism aspen-woodland Canadian-Rockies chemical-cycling population-biology flight-muscle-atrophy heterozygote-advantage
Amara quenseli
Quensel's seed-eating ground beetle
Amara quenseli is a seed-eating ground beetle in the family Carabidae. The species exhibits wing polymorphism, with populations containing macropterous (long-winged), brachypterous (short-winged), and intermediate forms. Two subspecies are recognized: A. q. quenseli and A. q. silvicola. It is one of the few carabid beetles known from Iceland, where its wing morphology has been studied in relation to habitat stability.
granivorous ground-beetle wing-polymorphism Iceland
Anisolabididae
Anisolabididae is a family of earwigs (order Dermaptera, suborder Neodermaptera) comprising 38 genera across 13 subfamilies. Members include both cosmopolitan and geographically restricted species, with some showing specialized adaptations for subcortical or coastal habitats. Several genera, particularly Euborellia, are recognized for their predatory behavior and potential as biological control agents of agricultural pests. The family exhibits diverse morphologies ranging from typical earwig body plans to dorsoventrally flattened forms adapted for life under bark.
earwigs predatory biological-control maternal-care wing-polymorphism subcortical cosmopolitan
Anotia fitchi
ball-nosed planthopper
Anotia fitchi is a rare, flightless or weakly-flying planthopper species endemic to North American tallgrass prairies. Adults measure less than 5 mm in length but can leap up to 35 inches—approximately 250 times their body length—making them among the most prodigious jumpers relative to size in the insect world. The species was historically known from scattered records across 16 U.S. states and Ontario, Canada, but 90% of all collected specimens come from a single 12-year study in Iowa prairies. Its distinctive inflated, spherical beak may function in intraspecific communication.
prairie-endemic rare-species jumping-insect host-specialist conservation-concern wing-polymorphism fire-adapted
Anthomyzidae
Anthomyzid Flies
Anthomyzidae are small, slender acalyptrate flies ranging from yellow to black in coloration. The family comprises fewer than 100 described species distributed across approximately 13 genera, with highest diversity in the Holarctic region. Members are characterized by narrow, elongated wings that may display distinct markings or, in some species, exhibit wing polymorphism with greatly reduced wings. The family has been recorded from all major biogeographic regions including the Nearctic, Palaearctic, Oriental, Afrotropical, Australian, and Oceanian regions, with recent discoveries extending its known range to New Zealand and China.
Acalyptratae Opomyzoidea microsaprophagous graminoid-associated Holarctic-diversity wing-polymorphism understudied-fauna
Archipsocus nomas
webbing barklouse, web-spinning barklouse
Archipsocus nomas is a web-spinning barklouse in the family Archipsocidae. It forms dense communal silk webs on tree trunks and branches in the southeastern United States. The species feeds on lichens, fungi, and organic debris. Populations peak in summer and autumn, with long-winged females dispersing to establish new colonies.
web-spinning gregarious lichen-feeder wing-polymorphism southeastern-US-endemic
Auridius auratus
Auridius auratus is a Nearctic leafhopper species in the family Cicadellidae, originally described as Jassus auratus by Gillette & Baker in 1895. The species exhibits wing polymorphism, a trait documented across the genus Auridius. It is one of twelve recognized species in this genus, which is characterized by yellow to golden coloration reflected in many of its species epithets. The junior synonym Auridius gilvus was synonymized with A. auratus by Hamilton in 1998.
leafhopper Cicadellidae Nearctic wing-polymorphism Deltocephalinae Paralimnini synonymized-taxon western-North-America
Auridius cosmeticus
Auridius cosmeticus is a Nearctic leafhopper species described by Hamilton in 1999 from Montana. It belongs to the genus Auridius, which comprises twelve known species characterized by wing polymorphism and specific host plant associations. The species was established during a comprehensive revision of the genus that included descriptions of eight new species and documentation of phenology patterns across the group.
leafhopper Nearctic Cicadellidae Deltocephalinae Paralimnini Montana wing-polymorphism 1999-description
Auridius safra
Auridius safra is a leafhopper species in the family Cicadellidae, described from the western United States in 1999. The species is characterized by yellow coloration and pronounced sexual dimorphism in both color and wing form. It inhabits shortgrass prairie ecosystems and exhibits wing polymorphism with both fully-winged (macropterous) and short-winged (brachypterous) individuals.
leafhopper Cicadellidae Nearctic prairie wing-polymorphism sexual-dimorphism univoltine
Auridius sandaraca
Auridius sandaraca is a Nearctic leafhopper species in the family Cicadellidae, described by Hamilton in 1999. The species occurs across central Canada and the north-central United States, with records from Alberta to Ontario and adjacent U.S. states. As a member of the genus Auridius, it exhibits wing polymorphism, a trait characteristic of this leafhopper group. The species was established during a comprehensive revision of the genus that documented host associations and phenology patterns across Auridius species.
leafhopper Nearctic wing-polymorphism Hamilton-1999 Deltocephalinae Paralimnini
Auridius thapsinus
Auridius thapsinus is a leafhopper species in the family Cicadellidae, described by Hamilton in 1999 from material collected in Arizona and Nevada. It belongs to a genus characterized by wing polymorphism, where individuals may exhibit either fully developed wings or reduced wing forms. The species is one of eight new species described in a comprehensive revision of the Nearctic genus Auridius.
leafhopper Cicadellidae Nearctic wing-polymorphism 1999-description Arizona Nevada Paralimnini
Berytidae
stilt bugs, thread bugs
Berytidae, commonly known as stilt bugs or thread bugs, is a family of true bugs (Hemiptera: Heteroptera) characterized by exceptionally long, slender legs and elongated bodies. The family contains approximately 200 species worldwide, classified into three subfamilies: Berytinae, Gampsocorinae, and Metacanthinae. Members range from 3-10 mm in length and display coloration from brown to yellow. While most species are phytophagous, feeding on plant sap, some exhibit predatory behavior on small insects. Several species are economically significant as pests of cultivated crops, particularly tomatoes and tobacco, where feeding damage can cause flower abortion, fruit distortion, and unsalable produce.
Hemiptera Heteroptera true-bugs stilt-bugs phytophagous predatory agricultural-pest tomato-pest biological-control wing-polymorphism glandular-trichomes greenhouse-pest
Berytinus minor
common stiltbug
Berytinus minor is a stilt bug (family Berytidae) native to Europe, North Africa, and parts of Asia that has been introduced to North America. The species exhibits wing polymorphism, occurring in both long-winged and short-winged forms with associated morphological differences in the pronotum. It is strongly associated with white clover (Trifolium repens) as a food plant and has been studied in detail at introduced populations in New York State.
stilt-bug wing-polymorphism introduced-species white-clover Hemiptera Berytidae
Blissus occiduus
Western Chinch Bug
Blissus occiduus, the western chinch bug, is a phloem-feeding true bug (Hemiptera: Blissidae) that is a significant pest of warm-season turfgrasses, particularly buffalograss and zoysiagrass. The species exhibits strong host preference hierarchies, with buffalograss being the most preferred host followed by zoysiagrass, though it can survive and reproduce on a broad range of grasses including agronomic crops. Field studies have documented inconsistent control with neonicotinoid insecticides, with thiamethoxam showing particularly rapid degradation in buffalograss tissues compared to imidacloprid and clothianidin.
turfgrass-pest chinch-bug phloem-feeder warm-season-grass-pest buffalograss zoysiagrass neonicotinoid-resistance integrated-pest-management Hemiptera Blissidae western-North-America host-preference systemic-insecticide agricultural-pest grain-crop-pest sorghum corn wheat rice barley oats rye crabgrass foxtail goosegrass johnsongrass barnyardgrass fall-panicum tall-fescue Kentucky-bluegrass perennial-ryegrass creeping-bentgrass St.-Augustinegrass centipedegrass bermudagrass phloem-sap-feeder turfgrass-management insecticide-degradation imidacloprid clothianidin thiamethoxam pesticide-efficacy host-suitability nymphal-mortality fecundity survival host-relocation stoloniferous-growth grass-architecture choice-behavior polyphagy specialist-feeding pest-of-lawns golf-course-pest sports-turf-pest residential-pest agricultural-entomology economic-entomology integrated-turf-management Barber-1918 Western-Nearctic Central-America North-America United-States Canada California Colorado Kansas 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airscape-sphere-sphere-sphere biosphere-sphere-sphere-sphere noosphere-sphere-sphere-sphere technosphere-sphere-sphere-sphere sociosphere-sphere-sphere-sphere ecosphere-sphere-sphere-sphere hydrosphere-sphere-sphere-sphere atmosphere-sphere-sphere-sphere lithosphere-sphere-sphere-sphere pedosphere-sphere-sphere-sphere cryosphere-sphere-sphere-sphere anthroposphere-sphere-sphere-sphere
Bryocoris pteridis
Bryocoris pteridis is a small plant bug in the family Miridae, specialized on fern feeding. It is widespread across Europe and the Palearctic, occurring from lowlands to alpine elevations up to 1500 m. The species exhibits wing polymorphism, with brachypterous forms predominating. It completes one or occasionally two generations per year, with adults active from June through September.
fern-specialist wing-polymorphism Palearctic forest-insect phytophagous
Byrrhoidea
Pill, Water and Toe-winged Beetles
Byrrhoidea is a superfamily of beetles within Elateriformia, comprising families that are primarily aquatic or semi-aquatic. It includes the families Byrrhidae (pill beetles), Elmidae (riffle beetles), Dryopidae (long-toed water beetles), Limnichidae (minute marsh-loving beetles), Psephenidae (water penny beetles), Heteroceridae (variegated mud-loving beetles), Chelonariidae (turtle beetles), Eulichadidae (forest stream beetles), Callirhipidae (cedar beetles), Cneoglossidae, and Ptilodactylidae. The superfamily was historically split into Dryopoidea, which is no longer recognized as separate. The current circumscription of Byrrhoidea may not be monophyletic, with Buprestoidea nested within it in some phylogenetic analyses.
aquatic-beetles freshwater-insects Elateriformia Polyphaga riffle-beetles water-penny-beetles biomonitoring wing-polymorphism
Calopteryx
Jewelwings
Calopteryx is a genus of large damselflies in the family Calopterygidae, commonly known as jewelwings. Males typically display brightly colored wings while females usually have clear wings, though some females develop male-like (androchrome) wing characteristics. The genus lacks a pterostigma, a wing cell found in most other odonates. Species occupy distinct zones within running water systems, with differential thermal adaptations driving habitat segregation.
damselfly Odonata running-water territorial-behavior wing-polymorphism thermal-adaptation aquatic-insect riparian
Dipara
Dipara is a genus of minute parasitoid wasps in the family Diparidae (Chalcidoidea), first described by Walker in 1833. The genus exhibits pronounced sexual dimorphism: females are typically wingless (apterous) or short-winged (brachypterous) with clavate antennae, while males are fully winged (macropterous) with filiform antennae. Species are collected primarily from leaf litter and soil habitats using yellow pan traps. Despite flightless females suggesting limited dispersal, some species show minimal phylogeographic structure across broad geographic ranges.
parasitoid sexual-dimorphism aptery leaf-litter soil-fauna Chalcidoidea wing-polymorphism
Doratura
Doratura is a genus of leafhoppers (Hemiptera: Cicadellidae) in the tribe Chiasmini, distributed across the Palearctic and Nearctic realms. The genus contains 23 valid species following recent taxonomic revision, including four species described in 2021–2022. Species exhibit wing reduction polymorphism (brachyptery) as a dispersal strategy. The genus has been subject to detailed taxonomic study focusing on genital morphology, species group relationships, and distribution patterns.
leafhopper Cicadellidae Deltocephalinae Chiasmini Palearctic Nearctic brachyptery wing-polymorphism taxonomic-revision
Enicocephalidae
unique-headed bugs, gnat bugs
Enicocephalidae, commonly known as unique-headed bugs or gnat bugs, is a family of approximately 300 species within the ancient and relictual infraorder Enicocephalomorpha. Members are small true bugs, typically around 4 mm in length, characterized by their elongated, constricted heads that give the family its common name. The family exhibits global distribution with greatest species richness in humid tropical and subtropical forests. Enicocephalidae are considered living fossils due to their evolutionarily conserved morphology. The family is classified into about 47 genera placed in five subfamilies, with notable polymorphism including winged males and wingless or short-winged females in many species.
Heteroptera Enicocephalomorpha living-fossils wing-polymorphism soil-fauna leaf-litter myrmecophily predatory-bugs cryptic-species global-distribution
Euscelis
Euscelis is a genus of leafhoppers in the subfamily Deltocephalinae, characterized by pronounced phenotypic plasticity driven by photoperiodic cues. Species exhibit seasonal wing polymorphism, producing long-winged (macropterous) dispersal forms under long-day conditions and short-winged (brachypterous) reproductive forms under short-day conditions. Males communicate through substrate-borne vibrational signals produced by abdominal tymbal organs, with species-specific songs functioning in mate recognition and reproductive isolation. The genus occurs primarily in the Palearctic region and includes agricultural pests such as Euscelis lineolata, which damages Medicago crops.
leafhopper photoperiodism wing-polymorphism acoustic-signaling agricultural-pest endosymbiosis Palearctic
Gerridae
water striders, water bugs, pond skaters, water skippers, Jesus bugs, water skeeters, water scooters, water gliders, water skimmers, puddle flies
Gerridae are a family of true bugs (Hemiptera: Heteroptera) renowned for their ability to walk on water. They possess hydrofuge hairpiles covering the body and specialized leg structures that exploit water surface tension. Most species inhabit freshwater, though the genus Halobates is exceptional as the only truly oceanic insect, living on open ocean surfaces. Over 1,700 species have been described, with body lengths ranging from 2–36 mm. They are predatory, feeding on surface-trapped invertebrates.
aquatic-insects surface-tension wing-polymorphism marine-insects predatory-bugs neuston pleuston biomechanics territoriality vibration-communication
Gerris buenoi
water strider
Gerris buenoi is a small water strider species native to North America, first described in 1911. Adults measure 8-10 mm in length and possess elongated mid-legs adapted for locomotion on water surfaces. The species exhibits wing polymorphism, with multiple wing forms corresponding to different seasons and environmental conditions. It has been extensively studied as a model organism for sexual conflict research and was the first water strider to have its genome sequenced.
water-strider aquatic-insect model-organism sexual-conflict genome-sequenced North-America freshwater predator hemimetabolous wing-polymorphism
Gryllotalpa
mole crickets
Gryllotalpa is a genus of mole crickets in the family Gryllotalpidae, characterized by highly modified fossorial front legs adapted for digging. The genus contains numerous species distributed across Africa, Europe, Asia, Australia, and the Americas, with several cryptic species complexes distinguished primarily by song patterns. Species within this genus are found in diverse habitats ranging from steppe zones and wet grasslands to gardens and agricultural fields. Some species, particularly Gryllotalpa gryllotalpa, are of conservation concern in parts of Europe while also being agricultural pests in other regions.
fossorial Orthoptera mole-cricket agricultural-pest soil-dwelling stridulation wing-polymorphism cryptic-species
Gryllus firmus
Sand Field Cricket, Sand Cricket
Gryllus firmus, the sand field cricket, is a wing-polymorphic cricket native to the southeastern United States. It exhibits a distinctive chirping call that distinguishes it from the trilling calls of closely related species. The species is notable for producing two egg types—fast-developing and diapause eggs—within single clutches, an adaptation to unpredictable conditions in sandy habitats. Wing morphs are associated with trade-offs between dispersal and reproduction: long-winged individuals can fly but have reduced fecundity, while short-winged individuals have enhanced reproductive output. The species hybridizes with Gryllus pennsylvanicus where their ranges overlap.
wing-polymorphism bet-hedging diapause hybrid-zone acoustic-signaling life-history-trade-off parasitism Gryllus-firmus/Gryllus-pennsylvanicus-hybridization cuticular-hydrocarbons mate-choice inbreeding-depression extra-nuclear-inheritance maternal-effects horsehair-worm Paragordius-varius eugregarine temperature-dependent-chirping Dolbear's-law speciation sexual-selection immunity-reproduction-trade-off flight-muscle-histolysis sandy-soil-habitat ephemeral-habitat colonizing-species phenotypic-plasticity RNAi non-model-organism evolutionary-developmental-biology
Gryllus rubens
Southeastern field cricket
Gryllus rubens, the southeastern field cricket, is a trilling field cricket native to the southeastern United States. It is a cryptic sister species to G. texensis, from which it originated via peripatric speciation. The species exhibits remarkable phenotypic plasticity in its communication system, with male calling songs and female preferences shifting reversibly between spring and fall generations in response to temperature. Wing polymorphism is environmentally and genetically influenced, with long-winged morphs appearing in spring/summer and short-winged morphs predominating in autumn/winter.
field-cricket trilling-cricket wing-polymorphism phenotypic-plasticity acoustic-communication speciation parasitoid seasonal-polyphenism bivoltine cryptic-species sexual-selection phonotaxis
Himacerus apterus
tree damsel bug
Himacerus apterus, commonly known as the tree damsel bug, is a predatory hemipteran in the family Nabidae. It is native to Eurasia and was first recorded in North America from eastern Nova Scotia between 1943 and 1989. The species exhibits wing polymorphism, with most individuals being brachypterous (short-winged). It is a generalist predator of small arthropods and has been considered for biological control applications, though cannibalism complicates mass rearing efforts.
predator damsel-bug wing-polymorphism forest-insect biological-control-candidate Eurasian-native cannibalism neurotoxic-venom
Hypoponera
Crypt Ants
Hypoponera is a genus of ponerine ants characterized by simplified morphology lacking clear autapomorphies. The genus exhibits cosmopolitan distribution across all continents except Antarctica, with notable absence from taiga, tundra, New Zealand, and central Asia. Multiple species display remarkable reproductive polymorphism, including winged and wingless (ergatoid) morphs in both sexes. Workers typically lack eyes or possess only very small eyes, while queens and males usually have well-developed eyes with interommatidial setae.
ponerine eyeless-workers ergatoid-males wing-polymorphism tramp-species cosmopolitan
Hypoponera opacior
Common Crypt Ant, ponerine ant
Hypoponera opacior is a small ponerine ant known for its unusual wing polymorphism in both sexes. Unlike most ant species, it produces both winged and wingless morphs in males and queens, with each morph associated with distinct reproductive behaviors and seasonal timing. The species has been extensively studied for its genetic architecture, which notably lacks the supergene-linked determination found in many other ants with similar reproductive polymorphisms. Males are particularly distinctive, appearing worker-like and wingless in some morphs, with translucent heads that cause frequent misidentification as wasps or braconid parasitoids.
subterranean wing-polymorphism cryptic alternative-reproductive-strategies sexual-dimorphism neotropical
Limnoporus
pondskaters
Limnoporus is a Holarctic genus of water striders (family Gerridae) comprising six extant species and one extinct species known from fossils. Species occur across northern North America and Eurasia, with notable hybridization between sympatric species in western Canada. The genus exhibits variation in body size, wing polymorphism, and habitat preferences that have been studied in phylogenetic and evolutionary contexts.
water-strider pondskater Holarctic hybridization Gerridae freshwater parasitoid-host phylogeny wing-polymorphism introgression
Longitarsus
flea beetles
Longitarsus is the largest genus of flea beetles (Chrysomelidae: Galerucinae), comprising over 700 species with a cosmopolitan distribution. Species exhibit diverse ecological strategies, including subaquatic lifestyles with pupation inside hydrophyte stems, and terrestrial herbivory on various plant families. Many species show wing polymorphism, with populations containing fully winged, reduced-winged, or vestigial-winged individuals. Host plant associations are generally phylogenetically conserved at the clade level, though Boraginaceae-associated species represent an exception.
flea-beetles wing-polymorphism subaquatic biological-control phytophagy phylogenetic-conservatism
Metadelphax
Metadelphax is a genus of delphacid planthoppers in the family Delphacidae, established by Wagner in 1963. The genus contains at least five described species, including M. propinqua, which has been studied for its biology and wing polymorphism. Members are small sap-feeding insects with characteristic delphacid morphology.
planthopper delphacid Auchenorrhyncha Fulgoromorpha Delphacoidea sap-feeder wing-polymorphism grassland-insect agricultural-pest-potential
Nabidae
Damsel Bugs
Nabidae is a family of predatory true bugs known as damsel bugs, containing over 500 species in approximately 20 genera. These soft-bodied, elongate insects are terrestrial predators that use raptorial forelegs to capture and hold prey, similar to mantids. They are economically important in agriculture due to their predation on crop pests including aphids, lepidopteran eggs, and other small insects. Many species are attracted to lights at night, and some exhibit wing polymorphism with fully winged, short-winged, or wingless forms.
predator agricultural-pest-control biological-control nocturnal raptorial-forelegs wing-polymorphism generalist-predator beneficial-insect true-bug Hemiptera Heteroptera Cimicomorpha
Platygastridae
Platygastridae is a family of minute parasitoid wasps in the superfamily Platygastroidea, comprising approximately 1100-2000 described species. Members are exclusively parasitoids, with most species measuring only 1–2 mm in length. The family is divided into two traditional subfamilies: Platygastrinae, which are koinobiont parasitoids of cecidomyiid (gall midge) eggs and larvae, and Sceliotrachelinae, which are generally idiobionts attacking eggs of beetles or Hemiptera. Several genera, including Synopeas, Trimorus, and Telenomus, contain species of agricultural importance as biological control agents.
parasitoid biological-control gall-midge-parasitoid egg-parasitoid agricultural-pest-control minute-wasps wing-polymorphism intertidal-adaptation learning-and-memory
Prokelisia marginata
Prokelisia marginata is a wing-dimorphic delphacid planthopper native to North American salt marshes, where it feeds on phloem sap of Spartina grasses. Populations contain two distinct adult forms: flightless brachypters and fully-winged macropters capable of dispersal flight. Wing-form is determined environmentally during nymphal development, primarily by crowding density and host plant quality, representing a conditional strategy that balances local reproduction against habitat tracking. The species has established invasive populations in Britain, where it exploits the introduced cordgrass Spartina anglica.
planthopper wing-polymorphism salt-marsh Spartina invasive-species phloem-feeder environmental-sex-determination habitat-tracking
Pteryx
Pteryx is a genus of minute feather-winged beetles in the family Ptiliidae. Adults are less than 1 mm in length and inhabit rotting wood, particularly under bark of decaying logs and stumps. The genus exhibits wing polymorphism, with individuals occurring in either a normal winged form or a vestigial-winged neonate form characterized by pale pigmentation and reduced eyes. Pteryx is distributed across the Northern Hemisphere in Eurasia and North America, with highest abundance in northern bogs and swampy habitats.
beetle feather-winged-beetle micro-beetle decomposer rotting-wood boreal wing-polymorphism Northern-Hemisphere
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-beetles wing-polymorphism parthenogenesis subcortical miniaturization
Pyrrhocoris
firebugs, cotton stainers
Pyrrhocoris is a genus of true bugs in the family Pyrrhocoridae, commonly known as firebugs or cotton stainers. The genus contains approximately eight described species, with Pyrrhocoris apterus (the firebug) being the most extensively studied. Species in this genus are primarily distributed across the Palaearctic realm, with some records from North America and East Asia. The genus is notable for its gregarious behavior and has served as an important model organism in studies of insect behavioral ecology, developmental plasticity, and wing polymorphism.
Heteroptera Pyrrhocoridae model-organism wing-polymorphism animal-personality gregarious-behavior Palaearctic
Pyrrhocoris apterus
firebug, European firebug
Pyrrhocoris apterus, commonly known as the firebug or European firebug, is a striking true bug recognized by its vivid red and black coloration. Native to the Palaearctic region, it has expanded its range to North America, Central America, India, and Australia. The species exhibits pronounced gregarious behavior, with larvae and adults frequently forming aggregations of tens to hundreds of individuals. It is primarily seed-feeding, specializing on lime tree and mallow seeds. A notable feature is its non-functional wing polymorphism: populations contain rare long-winged (macropterous) individuals alongside the typical short-winged (brachypterous) form, though the species is effectively flightless.
gregarious seed-feeder wing-polymorphism aggregation introduced-species model-organism
Sclerodermus
Flat wasp
Sclerodermus is a genus of small parasitoid wasps in the family Bethylidae, comprising at least 20 described species. These wasps exhibit quasi-social behavior rare among parasitoids: multiple females cooperate to paralyze hosts and provision shared broods with extended maternal care. Most individuals are wingless, leading to frequent misidentification as ants. The genus is notable for extremely female-biased sex ratios (often 86-97% female) and has significant value as biological control agents against wood-boring beetles, particularly in forestry systems.
parasitoid quasi-social maternal-care wing-polymorphism biological-control wood-boring-beetles pine-wilt-disease domestic-infestation stinging-wasp female-biased-sex-ratio Bethylidae idiobiont ectoparasitoid cuticular-hydrocarbons CRISPR-model-organism
Scolopostethus
dirt-colored seed bugs
Scolopostethus is a genus of dirt-colored seed bugs comprising more than 30 described species in the family Rhyparochromidae. Species occupy diverse habitats including ruderal areas, weedy lawns, and ant-associated environments. Some species are myrmecophilous, living near ant nests through chemical defense strategies rather than chemical mimicry. The genus has a Palearctic origin with at least one species, S. affinis, recently established in North America.
seed-bugs Rhyparochromidae myrmecophily invasive-species weed-seed-predation chemical-defense wing-polymorphism Palearctic-origin
Stenocranus
delphacid planthoppers
Stenocranus is a genus of delphacid planthoppers in the family Delphacidae, containing more than 70 described species. Species within this genus exhibit wing polymorphism, with macropterous (long-winged) and sub-macropterous forms occurring in at least some species. Several species are documented crop pests, particularly of corn, rice, and sugarcane. The genus has a broad distribution with records from Europe, North America, and Asia, though individual species vary in their geographic ranges. Some species have shown invasive potential, with range expansions into new regions documented in recent decades.
Delphacidae planthopper crop-pest wing-polymorphism macroptery sub-macroptery grass-feeder corn-pest rice-pest sugarcane-pest invasive-species phloem-feeder S.-pacificus S.-minutus Philippines Indonesia Japan Europe North-America parasitoid-host Cephalops-curtifrons
Stiphrosoma
Stiphrosoma is a genus of small flies in the family Anthomyzidae, established by Czerny in 1928. The genus contains at least 14 recognized species, including the type species S. sabulosum and 13 species described from the New World. A revised generic diagnosis was established in 2005 to accommodate all known species. The genus exhibits holarctic distribution, with some species showing wing polymorphism.
Anthomyzidae Diptera Holarctic wing-polymorphism taxonomic-revision
Stiphrosoma artum
Stiphrosoma artum is a small fly species in the family Anthomyzidae, described from the northern Great Plains of North America. It is one of 13 new species described in a 2005 revision of New World Stiphrosoma. The species exhibits wing polymorphism, with both fully winged and reduced-wing individuals documented.
wing-polymorphism Anthomyzidae Nearctic 2005-description Great-Plains
Streblidae
streblid bat flies, bat flies
Streblidae are a family of highly specialized dipteran flies in the superfamily Hippoboscoidea, comprising approximately 237 species in 33 genera. They are obligate ectoparasites of bats, exhibiting extreme morphological adaptations including variable wing reduction (from fully winged to completely wingless), eye degeneration, and dorsoventrally flattened bodies. The family shows pronounced host specificity, with individual fly species typically restricted to particular bat host species. Streblidae are classified as pupiparous flies, meaning females retain and nourish larvae internally until they are deposited as fully developed prepupae.
bat-parasite ectoparasite pupiparous wing-polymorphism host-specificity Hippoboscoidea blood-feeding Trypanosoma-vector
Teleasinae
Teleasinae is a subfamily of minute parasitoid wasps in the family Scelionidae. Members are exclusively egg parasitoids of ground beetles (Carabidae), making them unique among Scelionidae in this host specialization. The subfamily contains approximately 14 genera and over 480 described species worldwide, with Trimorus alone comprising 389 species. Taxonomic placement has shifted historically, having been treated previously as a subfamily of Platygastridae before molecular analyses reclassified Scelionidae as a subfamily within Platygastridae.
egg-parasitoid carabid-parasite wing-polymorphism sexual-dimorphism ground-dwelling minute-wasps soil-fauna agroecosystems
Tetrix subulata
Slender Ground-hopper, Slender Groundhopper, Awl-shaped Pygmy Grasshopper, Slender Grouse Locust
Tetrix subulata is a small groundhopper (family Tetrigidae) with a Holarctic distribution spanning the Palearctic and Nearctic regions. The species exhibits striking polymorphism in both coloration and wing development, with long-winged (macropterous) and short-winged (brachypterous) morphs coexisting in populations. It is strongly associated with moist habitats, particularly wet meadows, riverbanks, and mudflats, where it feeds primarily on algae and mosses. The species has been extensively studied for its wing dimorphism, reproductive interference with congeners, and life-history trade-offs between flight capability and reproduction.
groundhopper pygmy-grasshopper wing-polymorphism moist-habitat Holarctic riparian algae-feeder moss-feeder reproductive-interference flood-avoidance
Trimorus
Trimorus is a genus of minute parasitoid wasps in the subfamily Teleasinae, family Scelionidae. These wasps are egg parasitoids of ground beetles (Carabidae), with females laying eggs inside beetle eggs. The genus is highly diverse, with approximately 389 described species worldwide, though many more likely remain undescribed. Members exhibit striking sexual dimorphism and wing polymorphism, with both sexes showing variation from fully winged to completely wingless forms.
parasitoid egg-parasitoid sexual-dimorphism wing-polymorphism micro-wasp soil-dwelling Carabidae-parasite