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Nomada armatella
Yellow-backed Nomad
Nomada armatella is a cuckoo bee species in the family Apidae, first described by Cockerell in 1903. As a member of the genus Nomada, it exhibits kleptoparasitic behavior, laying eggs in the nests of host bee species rather than constructing its own nests. The species has been documented in North America, with confirmed records from Vermont, United States. Like other Nomada species, it likely targets specific host bees, though detailed host associations for this particular species remain poorly documented.
Nomada crotchii
Crotch's Nomad
Nomada crotchii is a species of nomad bee (kleptoparasitic cuckoo bee) in the family Apidae. It occurs in North America. As a member of the genus Nomada, it is presumed to be a nest parasite of other bees, though specific host relationships have not been documented for this species. The species was described by Cresson in 1878 and has two recognized subspecies: N. c. crotchii and N. c. nigrior.
Nomotettix cristatus
crested pygmy grasshopper, crested grouse locust, northern crested grouse locust
Nomotettix cristatus is a small pygmy grasshopper in the family Tetrigidae, commonly known as the crested pygmy grasshopper or crested grouse locust. It is one of approximately 35 Nearctic species of Tetrigidae. The species exhibits three recognized subspecies with distinct geographic distributions across North America. Like other members of its family, it is characterized by an elongated pronotum that extends over the abdomen, a trait distinguishing pygmy grasshoppers from typical grasshoppers in Acrididae.
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stemhumanRelevanceinteraction-with-humanssimilarTaxamust-include-reasonmisconceptionsonly-if-meaningfulextraDetailsimportant-additional-contextSTYLE-RULESclear-direct-sentencesavoid-fluff-filler-languagerepeating-taxonomy-in-proseoverly-technical-jargonconcrete-statementsabstract-descriptionsQUALITY-RULEScompleteness-highmost-fields-well-supportedcompleteness-mediumpartial-but-reliablecompleteness-lowsparse-datahasInferredContenttrue-ONLY-if-generalization-usedotherwise-falseOUTPUT-FORMATstrictly-match-JSON-schemano-extra-fieldsno-commentary-outside-JSONwater-associatedthree-subspeciesN.-c.-cristatusN.-c.-compressusN.-c.-floridanussmall-size399-observationsexact-matchmedium-completenessno-inferred-contentfactual-correctness-prioritizedconservative-approachinformative-contentno-fluffno-vague-generalizationscautious-language-where-neededno-fabricationunique-field-contentfocused-sectionsJSON-schema-complianceno-commentaryOgcodes incultus
Ogcodes incultus is a species of small fly in the family Ogcodidae, a group commonly known as spider flies due to their parasitic association with spiders. The genus Ogcodes contains species that are specialized parasitoids, with larvae developing on or within arachnid hosts. Ogcodes incultus is one of several North American species in this genus, though detailed biological studies remain limited. Adults are generally inconspicuous and seldom encountered by casual observers.
Oliarces
Oliarces is a genus of moth lacewings (Neuroptera: Ithonidae) containing a single described species, O. clara. Moth lacewings are a relatively obscure group of neuropterans characterized by their moth-like appearance and reduced wing venation compared to other lacewings. The genus was established by Nathan Banks in 1908. Very little is known about the biology or ecology of this genus due to its rarity and limited observations.
Omalorphanus
Omalorphanus is a monotypic genus of rove beetles (Staphylinidae) described in 1987 from the H.J. Andrews Experimental Forest in Oregon. The sole species, Omalorphanus aenigma, was noted by its authors for possessing multiple unusual morphological features that complicated its taxonomic placement. The genus was ultimately assigned to subfamily Omaliinae based on its distinctive defense gland structure and spiracle arrangement.
Omethinae
Omethinae is a small subfamily of click beetles within the family Omethidae, containing only the genus Omethus. These beetles are among the most obscure members of Elateroidea, with very few specimens known and limited biological data available. The group has been historically overlooked due to its rarity and the remote habitats of its constituent species. Current knowledge is based primarily on scattered museum collections rather than field studies.
Omus californicus angustocylindricus
Narrow Night-stalking Tiger Beetle
Omus californicus angustocylindricus is a subspecies of night-stalking tiger beetle endemic to California. It is one of several subspecies within the Omus californicus complex, characterized by its narrow, elongated body form. Adults are nocturnal and difficult to observe, with activity patterns tied to seasonal conditions. Larvae construct burrows in forested habitats, typically found along logging roads or under cover objects. The subspecies is considered rare and has been documented from limited localities in northern California, particularly in Plumas County.
Ophiogomphus howei
Pygmy Snaketail
Ophiogomphus howei, commonly known as the pygmy snaketail, is the smallest species in its genus in North America. This rare gomphid dragonfly is endemic to the United States and exhibits a highly disjunct distribution pattern across two main regions: the Great Lakes area and the Appalachian Mountains. Recent discoveries in southern Michigan suggest the species may be more adaptable to disturbed habitats than previously thought.
Opilo
Opilo is a genus of checkered beetles (family Cleridae) in the subfamily Clerinae. Species within this genus are distributed across Europe, with records from Denmark, Norway, Sweden, and Italy. The taxonomy of the genus is complicated, with some species historically considered synonymous. At least one species, Opilo germanus, is extremely rare across its European range and poorly known biologically.
Optioservus phaeus
Scott optioservus riffle beetle
Optioservus phaeus is a species of riffle beetle (family Elmidae) described by White in 1978. It belongs to a genus of small aquatic beetles inhabiting running waters. The species was described as part of a taxonomic revision based on male genitalia, elytral patterns, and geographic distribution. It is known from a highly restricted range in Kansas.
Oreodytes humboldtensis
Oreodytes humboldtensis is a species of predaceous diving beetle in the family Dytiscidae, described by Zimmerman in 1985. As a member of the genus Oreodytes, it belongs to a group of small diving beetles primarily associated with running water habitats. The species epithet suggests a connection to the Humboldt region, likely referring to Humboldt County or the broader Humboldt Bay area of coastal northern California. Like other Oreodytes species, it is presumed to be an aquatic predator in freshwater systems.
Oreoneta
A genus of dwarf spiders (family Linyphiidae) established in 1894, comprising approximately 30 species distributed across cold-temperate and Arctic regions of the Northern Hemisphere. Most species inhabit high-latitude or high-altitude environments. The genus was revised extensively by Saaristo & Marusik in 2004, resulting in numerous new species descriptions.
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feei
Fee's Mucksucker
Orthonevra feei is a rare syrphid fly species described in 2019, known only from New Hampshire, United States. As a hoverfly, adults are capable of sustained hovering flight. The species belongs to a genus whose larvae are of the rat-tailed type, though O. feei larvae specifically remain undescribed. Adults are associated with flowers for nectar and pollen feeding.
Orus armiger
Orus armiger is a species of parasitic woodwasp in the family Orussidae, a group notable for their unique evolutionary position and specialized host-finding behavior. The family Orussidae contains only about 75 species worldwide, making it one of the smallest and least understood families of Hymenoptera. Orussid wasps are the only parasitoid wasps that attack wood-boring beetle larvae, using vibrational sounding to locate hosts within solid wood. Adults are rarely encountered in the field and are frequently mistaken for ants due to their appearance and behavior.
Orussidae
parasitic wood wasps, parasitoid wood wasps
Orussidae is a small family of approximately 93 extant species of parasitoid sawflies. They occupy a pivotal phylogenetic position as the sister taxon to the megadiverse Apocrita, indicating that parasitism evolved in the common ancestor of Orussidae + Apocrita. Adults are rarely encountered, typically found on sun-exposed dead wood where females use vibrational sounding to locate concealed hosts. Larvae are the only carnivorous sawfly larvae known, acting as parasitoids of wood-boring beetles and other Hymenoptera.
Orussus minutus
Orussus minutus is a rarely collected parasitic woodwasp in the family Orussidae, native to the eastern United States. The species is notable for its significant western range expansion documented through citizen science platforms and museum collections. Previously known from only about 50 specimens mainly in the Northeast, new records from Arkansas, Iowa, Minnesota, and Manitoba extend its range hundreds of miles westward. The species is extremely uncommon in collections despite intensive trapping efforts.
Orussus occidentalis
Western Orussid Wasp
Orussus occidentalis is a parasitic woodwasp in the family Orussidae, one of the most evolutionarily basal lineages of parasitic Hymenoptera. Adults are rarely encountered and frequently mistaken for carpenter ants due to their dark coloration and wing-folding posture. The species employs a unique host-location strategy using vibrational sounding: females tap their clubbed antennae against wood surfaces and detect returning echoes through specialized subgenual organs in their front legs to locate concealed wood-boring beetle larvae.
Orussus terminalis
Orussus terminalis is a parasitic woodwasp in the family Orussidae, a group unique among woodwasps for their parasitoid lifestyle. Like other orussids, they are rarely encountered in collections and poorly studied. The species belongs to a family whose members attack immature stages of wood-boring beetles and other woodwasps. Orussus terminalis has been recorded from eastern North America, with distribution records from Canada (Ontario, Quebec) and the United States (Vermont).
Orussus thoracicus
Orussus thoracicus is a parasitic woodwasp in the family Orussidae, one of the rarest and most unusual groups of Hymenoptera. Adults are often mistaken for carpenter ants due to their dark coloration and wing-folding behavior. The species has been recorded from Canada, specifically British Columbia, though its biology and ecology remain poorly documented. Like other orussids, it likely parasitizes wood-boring beetle larvae using specialized vibrational sounding to locate hosts.
Pandeleteius rotundicollis
Pandeleteius rotundicollis is a species of broad-nosed weevil described by Fall in 1907. It belongs to the family Curculionidae, one of the largest families of beetles. The species is known from scattered localities in southwestern North America, with records from Texas, New Mexico, Arizona, and the Mexican state of Chihuahua. Like other members of its genus, it likely inhabits arid and semi-arid environments, though specific ecological details remain poorly documented.
Panorpa floridana
Florida scorpionfly
Panorpa floridana, the Florida scorpionfly, is a rare endemic species in the family Panorpidae known only from two counties in northern Florida. Described as "cryptic" yet distinctive in appearance, it remained unrecorded for 28 years until its rediscovery in 2010 from a photograph taken at Gold Head Branch State Park in Clay County. The species is considered one of the most geographically restricted scorpionflies in North America.
Panscopus torpidus
Panscopus torpidus is a weevil species in the family Curculionidae, subfamily Brachycerinae. It belongs to a genus of small to medium-sized weevils associated with coniferous forests in western North America. The species name 'torpidus' (meaning sluggish or inactive) may reflect behavioral traits or was applied descriptively by early taxonomists. It is among the less commonly encountered species in its genus, with few documented observations.
Pantarbes megistus
Pantarbes megistus is a species of bee fly in the family Bombyliidae. It was described by Hall and Evenhuis in 1984. The species has an extremely restricted known distribution, documented only from the northern Mojave Desert in California. As a member of the subfamily Cythereinae, it belongs to a group of bee flies whose biology remains poorly understood.
Papaipema cerina
golden borer moth
Papaipema cerina, the golden borer moth, is a bright yellow noctuid moth found in the Great Lakes region of North America. Adults are active from September through mid-October. The species is uncommon to rare and is associated with diverse wetland and forest habitats. Larvae are borers that feed on lilies, May apple, and certain grass species.
Papaipema polymniae
Cup Plant Borer, Leafcup Borer Moth
Papaipema polymniae is a noctuid moth commonly known as the Cup Plant Borer or Leafcup Borer Moth. The species is a specialist herbivore whose larvae feed exclusively on Polymnia uvedalis (leafcup), a native North American plant in the sunflower family. It has been documented in limited numbers in the northeastern United States.
Papaipema sulphurata
Water-willow Stem Borer, Decodon Stem Borer, Swamp Loosestrife Borer Moth
Papaipema sulphurata is a noctuid moth endemic to southeastern Massachusetts, including Martha's Vineyard and Nantucket. The species is an obligate specialist on Decodon verticillatus (water-willow or swamp loosestrife), with larvae that tunnel into stems and feed on vascular tissue. Adults fly in autumn, with a wingspan of 32–38 mm. The species is considered rare due to its restricted range and specific host plant requirements.
Papusus
Papusus is a genus of minute rove beetles in the family Staphylinidae, subfamily Scydmaeninae, tribe Papusini. The genus was described by Casey in 1897 and is the sole member of its tribe. These beetles are among the smallest staphylinids and are associated with forest floor habitats. The genus is rarely encountered, with extremely limited observational records.
Paradonus beckeri
Paradonus beckeri is a species of click beetle in the family Elateridae, described by Stibick in 1991. It belongs to the genus Paradonus, which is part of the diverse Elateridae family characterized by their ability to produce a clicking sound through a prosternal process that snaps against a mesosternal groove. The species is known from limited collection records in eastern Canada.
Paramblynotus
Paramblynotus is a genus of extremely rare parasitoid wasps in the family Liopteridae, subfamily Mayrellinae. The genus comprises very small species that superficially resemble gall wasps (Cynipidae). It occurs in the Afrotropical region and Madagascar, with additional species described from China. The genus was first recorded from Madagascar in 2013, where two species groups were identified including the endemic P. seyrigi group. Most species are known from single specimens, and museum collections remain under-represented.
Parandra polita
Parandra polita is an unusual longhorned beetle belonging to the archaic subfamily Parandrinae. It exhibits a remarkable convergence with stag beetles (family Lucanidae) in appearance, featuring chestnut-brown coloration and large, forward-projecting mandibles. The species is uncommon and poorly known, with most records coming from blacklight collections in wet bottomland forests. It is one of only four parandrine taxa in North America and can be distinguished from the similar Neandra brunnea by its contiguous triangular mandibles and entire (non-emarginate) eyes.
Paraptorthodius mirabilis
Wonderful Phengodid
Paraptorthodius mirabilis is a glowworm beetle in the family Phengodidae, first described by Schaeffer in 1904. The species is known from North America. Like other phengodids, adults are likely bioluminescent, though specific documentation of this trait for this species is not confirmed in available sources. The common name "Wonderful Phengodid" reflects both its species epithet (mirabilis, meaning "wonderful" or "remarkable") and its membership in a family known for spectacular light production.
Pectotoma
false flower beetles
Pectotoma is a genus of false flower beetles in the family Scraptiidae, established by Hatch in 1965. The genus contains a single described species, Pectotoma hoppingi. Members of this genus belong to a small family of beetles often associated with flowers and decaying vegetation.
Peltastica
tooth-necked fungus beetles
Peltastica is a genus of small beetles in the family Derodontidae, commonly referred to as tooth-necked fungus beetles. The genus was established by Mannerheim in 1852 and includes at least two described species: P. tuberculata and P. amurensis. These beetles belong to the subfamily Peltasticinae and are associated with fungal habitats. The genus is rarely encountered and poorly known biologically.
Pentodontini
rhinoceros beetles
Pentodontini is the most diverse tribe within the subfamily Dynastinae (rhinoceros beetles), containing over 100 genera distributed across multiple biogeographic regions. Most genera are restricted to a single biogeographic region. The tribe is characterized by substantial morphological diversity, with generic-level identification often relying on mouthpart morphology in females and secondary sexual characters (horns, claw modifications, antennal club length) in males.
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hconnectivity-conservationcorridorbuffer-zoneprotected-areanational-parknature-reservewildlife-refugewilderness-areaworld-heritage-sitebiosphere-reserveRamsar-siteImportant-Bird-AreaKey-Biodiversity-AreaAlliance-for-Zero-Extinction-siteconservation-priorityhotspotcrisis-ecoregionglobal-200last-of-the-wildhuman-footprintcumulative-impactthreat-indexvulnerability-indexadaptive-capacityexposuresensitivityresilienceresistancerecoveryrestorationrehabilitationreintroductiontranslocationex-situin-situcaptive-breedingbotanic-gardenzoogene-bankseed-banktissue-banksperm-bankoocyte-bankembryo-bankDNA-bankfrozen-zooarkinsurancesafety-netde-extinctiongenetic-rescuegenetic-restorationgenetic-augmentationgenetic-managementpopulation-managementmetapopulationsource-sinkpatchmatrixlandscapeseascapeecosystembiomeecoregionprovincezoneregiondistrictsitelocalityhabitatmicrohabitatnicheecological-nichefundamental-nicherealized-nichetrophic-nichespatial-nichetemporal-nichebiotic-nicheabiotic-nichemultidimensional-nichen-dimensional-nicheHutchinsonian-nicheGrinnellian-nicheEltonian-nicheresourcerequirementlimitationstressdisturbanceperturbationfluctuationvariabilityheterogeneitycomplexitydiversityredundancystabilitypersistenceadaptationacclimationplasticityevolvabilityheritabilityselectiondriftflowmutationrecombinationspeciationcoalescencedivergenceconvergenceparallelismhomoplasyanalogyhomologysynapomorphysymplesiomorphyautapomorphyapomorphyplesiomorphyderivedancestralprimitiveadvancedbasalcrownstemnodebranchcladegradesubfamilyfamilysuperfamilyinfraordersuborderordersuperorderinfraclasssubclassclasssuperclasssubphylumphylumsuperphylumkingdomdomainlifeorganismindividualetc.Peploglyptus
clown beetles
Peploglyptus is a genus of clown beetles in the family Histeridae, established by J. L. LeConte in 1880. The genus contains three described species: P. belfragei, P. golbachi, and P. mulu. As members of the Onthophilinae subfamily, these beetles share the compact, rounded body form typical of histerid beetles. The genus is rarely encountered, with minimal observational records.
Phausis rhombica
Phausis rhombica is a firefly species in the beetle family Lampyridae, described by Fender in 1962. It belongs to the genus Phausis, which includes other "shadow ghost" fireflies characterized by neotenic, wingless, glowing females and winged, non-luminous males. The species is found in North America, with distribution records from Alberta, Canada.
Phydanis
Phydanis is a genus of flea beetles (Chrysomelidae: Galerucinae: Alticini) containing two described species. The genus was established by Horn in 1889. Species in this genus are uncommonly encountered and poorly documented in the literature. One species, P. bicolor, has been recorded from Texas with a confirmed adult host association, though specific host plants are not detailed in available sources.
Phyllobrotica circumdata
skeletonizing leaf beetle
Phyllobrotica circumdata is a skeletonizing leaf beetle in the family Chrysomelidae. It is among the rarest leaf beetles in Missouri, with most records consisting of eight specimens collected in the late 1970s. The species has a broad North American distribution but is infrequently encountered. It is a host specialist, feeding on plants in the genus Scutellaria (skullcaps) in the mint family.
Phyllobrotica costipennis
skeletonizing leaf beetle
Phyllobrotica costipennis is a species of skeletonizing leaf beetle in the family Chrysomelidae. The species was described by George Henry Horn in 1893. It is recorded from North America, though specific details about its distribution, host plants, and biology remain poorly documented compared to congeners. Like other Phyllobrotica species, it likely exhibits strong host plant specialization.
Phyllobrotica decorata
Phyllobrotica decorata is a species of skeletonizing leaf beetle in the family Chrysomelidae. It is distributed across North America, with records from Canada (Alberta, British Columbia, Manitoba) and the United States. Like other members of the genus Phyllobrotica, it is believed to be a host specialist, though specific host plant associations for this species remain poorly documented compared to congeners.
Phyllobrotica lengi
Phyllobrotica lengi is an exceptionally rare leaf beetle endemic to eastern North America. First described by Blatchley in 1910, this species remained virtually unknown in Missouri until a small series was collected in 1988 on Scutellaria parvula. It is one of the rarest beetles in Missouri, with only four historical specimens known prior to the 1988 collection. Like other Phyllobrotica species, it is an extreme host specialist, feeding exclusively on skullcap plants (Scutellaria).
Phyllobrotica nigritarsis
Phyllobrotica nigritarsis is a rare leaf beetle (Chrysomelidae) endemic to the central United States. The species was historically known from only four specimens collected in Missouri during the late 1800s until a small series was collected in 1987. It is an extreme host specialist, feeding exclusively on Scutellaria parvula (small skullcap), a member of the mint family (Lamiaceae). Like other Phyllobrotica species, it inhabits wet bottomland habitats rather than dry prairies.
Phyllophaga nebulosa
June beetle
Phyllophaga nebulosa is a rare species of June beetle endemic to Jones Lake State Park in North Carolina. It was discovered in 2007 by entomologist Maxi Polihronakis, who initially could not identify specimens collected during research at the park. The species is notable for its highly restricted geographic range and unusual habitat preferences compared to other members of its genus.
Phylloscelis pennata
Phylloscelis pennata is a species of planthopper in the family Dictyopharidae, described by Ball in 1937. It belongs to a small genus within the tribe Phylloscelini, characterized by leaf-like body modifications. The species is known from extremely limited records, with minimal observational data available.
Phymonotus jacintotopos
San Jacinto shieldback
Phymonotus jacintotopos is a rare, monotypic shield-backed katydid endemic to the San Jacinto Mountains of southern California. It is distinguished by an unusually enlarged dome-like pronotum, distinctive red-and-black coloration, and a unique calling song. The species is considered a Pleistocene relic, restricted to isolated high-elevation conifer forests. It belongs to the tribe Nedubini, whose members have a Gondwanan distribution.
Placoschema dimorpha
Placoschema dimorpha is a small longhorned beetle (family Cerambycidae) and the sole member of its genus. Described from Mexico in 2010, it represents a significant range extension as the first U.S. record was documented from southeastern Arizona in 2013. The species exhibits pronounced sexual dimorphism in coloration: males have black elytra with red lateral margins on the basal half, while females have entirely reddish elytra or at most a darker apical fascia. At approximately 10 mm in length, its diminutive size and somber coloration contrast sharply with the typically large, colorful members of the tribe Trachyderini.
Platycheirus kelloggi
Broad-bodied Sedgesitter
Platycheirus kelloggi is a rare species of hoverfly (family Syrphidae) endemic to western North America. The species is distinguished by its broad, oval abdomen with dull orange spots and distinctive leg morphology in males. It has been documented from Alaska south to southern California and in the Rocky Mountains, including Canada.
Pleroneura bruneicornis
Balsam Shootboring Sawfly
Pleroneura bruneicornis is a species of sawfly in the family Xyelidae, commonly known as the Balsam Shootboring Sawfly. The species is associated with Abies (fir) hosts, particularly balsam fir. It belongs to a primitive lineage of Hymenoptera characterized by distinctive larval feeding habits in conifer shoots. The species is rarely observed, with limited occurrence records.
Plesioclytus morrisi
Plesioclytus morrisi is a longhorn beetle species in the family Cerambycidae, described by Wappes and Skelley in 2015. It was previously known as Aegomorphus morrisii. The species has been documented in Mississippi, where specimens were collected in prairie habitats. It is considered uncommon and was historically known from very few specimens.