Nearctic
Guides
Tricorythodes
little stout crawler mayflies
Tricorythodes is a genus of small, robust mayflies in the family Leptohyphidae, commonly known as little stout crawler mayflies. The genus comprises approximately 16 described species distributed across the Americas. Nymphs are primarily found in stream habitats where they function as collector-gatherers, processing fine particulate organic matter. Species within this genus exhibit multivoltine life histories with development rates strongly influenced by temperature.
Tricorythodes explicatus
Tricorythodes explicatus is a species of small mayfly in the family Leptohyphidae, first described by Eaton in 1892. It belongs to a genus commonly known as stout crawler mayflies, characterized by reduced wing venation and robust body proportions. The species has been documented in Middle America and North America, though detailed biological studies remain limited.
Tricrania
Tricrania is a genus of Nearctic blister beetles (Meloidae: Nemognathinae) containing at least three described species, including T. sanguinipennis and T. stansburyi. These beetles are obligate cleptoparasites of solitary bees, with highly modified life cycles involving hypermetamorphosis and flightless adults. The genus is notable for its specialized larval stages that exploit bee nest aggregations.
Tricyphona auripennis
Tricyphona auripennis is a species of crane fly in the family Pediciidae, first described by Osten Sacken in 1860. It is a Nearctic species with documented records from eastern Canada and the northeastern United States. The species belongs to a genus of small to medium-sized crane flies characterized by distinctive wing venation patterns. Very few observations of this species have been recorded, with only two observations documented on iNaturalist as of the knowledge cutoff.
Tricyphona gigantea
Tricyphona gigantea is a species of crane fly in the family Pediciidae, described by Alexander in 1940. It is known from limited distribution records in the southeastern United States, specifically Tennessee and North Carolina. The genus Tricyphona is characterized by distinctive wing venation patterns and elongated body forms typical of Pediciidae.
Tricyphona septentrionalis
Tricyphona septentrionalis is a species of limoniid crane fly in the family Pediciidae, first described by Bergroth in 1888. It is distributed across the Nearctic region, ranging from Alaska southward through western North America to California and New Mexico. Like other Pediciidae, it belongs to a group of crane flies often associated with moist woodland habitats. The species is rarely encountered, with only two observations recorded on iNaturalist.
Trigonogya reticulaticollis
Trigonogya reticulaticollis is a species of metallic wood-boring beetle in the family Buprestidae. It was described by Schaeffer in 1904 and is known from the Nearctic region. The species belongs to a small genus of buprestid beetles characterized by triangular body shapes. Available records for this species are extremely limited, with only one documented observation in iNaturalist.
Trigonorhinus sp-one-nm
Trigonorhinus sp-one-nm is an undescribed or provisionally named species within the genus Trigonorhinus, a group of fungus weevils in the family Anthribidae. Species in this genus are small to medium-sized beetles associated with fungal substrates. The 'sp-one-nm' designation indicates this is a distinct morphospecies recognized from New Mexico, pending formal taxonomic description. Members of Trigonorhinus exhibit characteristic angular or trigonous rostral profiles that distinguish them from related anthribid genera.
Triphalopsis
Triphalopsis is a genus of darkling beetles in the family Tenebrionidae, established by Blaisdell in 1923. It is native to the Nearctic region and contains species adapted to arid and semi-arid environments typical of many tenebrionid beetles. The genus is poorly documented in scientific literature, with minimal published information on its biology and ecology.
Tripudia calusa
Tripudia calusa is a species of owlet moth in the family Noctuidae, described by Troubridge in 2020. The species was documented from bycatch collected during mosquito surveillance in the Florida Keys. It belongs to a genus of small noctuid moths found in the Nearctic region. Like other members of Eustrotiinae, it is likely a nocturnal moth with cryptic coloration.
Tripudia damozela
Tripudia damozela is a small noctuid moth described by Harrison Gray Dyar Jr. in 1914. It belongs to the subfamily Eustrotiinae, a group of generally small, often brightly patterned owlet moths. The species is documented from Central and North America, though specific details about its biology remain limited. Its MONA (Moths of North America) or Hodges number is 9002.2.
Tripudia grapholithoides
Florida Tripudia Moth
Tripudia grapholithoides is a species of owlet moth (family Noctuidae) in the subfamily Eustrotiinae. It was described by Möschler in 1890. The species has a broad distribution spanning the Caribbean, North America, and South America. It is catalogued under Hodges number 9004 in the North American moth numbering system.
Tritoxa
Tritoxa is a genus of picture-winged flies in the family Ulidiidae, established by Loew in 1873. The genus contains seven described species distributed in the Nearctic region, with two species described in 2021. Species identification relies primarily on wing pattern differences, though examination of male genitalia is necessary for confident identification of certain sympatric species. One undescribed species based on female specimens is known from California and Nevada.
Tritoxa cuneata
Tritoxa cuneata is a species of picture-winged fly in the family Ulidiidae, first described by Loew in 1873. It is one of seven recognized species in the Nearctic genus Tritoxa. The species is distributed across Canada and the United States.
Tritoxa decipiens
Tritoxa decipiens is a species of picture-winged fly in the family Ulidiidae, described in 2021 from a type locality near Smithers, British Columbia. It is one of seven recognized species in the Nearctic genus Tritoxa, including two species newly described in the same revision. The species can be differentiated from congeners by wing patterns, though examination of male genitalia is required for confident identification of certain sympatric species.
Tritoxa flexa
Black Onion Fly
Tritoxa flexa, commonly known as the Black Onion Fly, is a Nearctic species of picture-winged fly in the family Ulidiidae. It was first described by Wiedemann in 1830 and is one of seven recognized species in the genus Tritoxa. The species possesses distinctive patterned wings characteristic of ulidiid flies. A 2021 revision of the genus provided species illustrations, distribution maps, and a diagnostic key to differentiate T. flexa from congeners.
Tritoxa incurva
Tritoxa incurva is a species of picture-winged fly in the family Ulidiidae, originally described by Loew in 1873. It is one of seven recognized species in the Nearctic genus Tritoxa, distinguished by its bold wing patterns. The species occurs in the eastern United States, where adults are active from May through October in grassy meadow habitats.
Tritoxa pollinosa
Tritoxa pollinosa is a species of picture-winged fly in the family Ulidiidae, described by Cole in 1919. It is one of seven recognized species in the Nearctic genus Tritoxa, distinguished primarily by wing pattern characteristics. The species occurs in the United States.
Tritoxa ra
Tritoxa ra is a species of picture-winged fly in the family Ulidiidae, one of seven recognized species in the Nearctic genus Tritoxa. The species was originally described by Harriot in 1942. Like other members of the genus, it possesses distinctive wing patterns that aid in identification. The species occurs in the United States.
Trophodeinus
Trophodeinus is a genus of scuttle flies in the family Phoridae, subfamily Metopininae. The genus was established by Borgmeier in 1960 and contains eight described species distributed primarily in the Americas. Members of this genus are small, humpbacked flies characteristic of the phorid family morphology. Little is known about the biology or ecology of most species in this genus.
Tropidosteptes palmeri
A small plant bug in the family Miridae, described by Reuter in 1908. Records indicate presence in eastern and central North America, including Quebec, West Virginia, and Wisconsin. As a member of Miridae, it possesses piercing-sucking mouthparts characteristic of true bugs.
Tropisternus collaris
collared water scavenger beetle
Tropisternus collaris is a species of water scavenger beetle in the family Hydrophilidae. It is found across a broad geographic range including the Caribbean, North America, and South America. The species was described by Fabricius in 1775, originally as Hydrophilus collaris. Several subspecies have been recognized, including T. c. collaris, T. c. mexicanus, T. c. proximus, T. c. striolatus, and T. c. viridis.
Trox capillaris
Hide beetle
Trox capillaris is a species of hide beetle in the family Trogidae, first described by Thomas Say in 1824. As a member of this family, it is associated with the late stages of vertebrate decomposition, feeding on dried skin, hair, feathers, and connective tissue. The species occurs in the Nearctic region, primarily in the central and eastern United States and southern Canada.
Trox foveicollis
hide beetle
Trox foveicollis is a species of hide beetle in the family Trogidae, currently classified under the genus Glyptotrox. The species is known from the central and eastern United States and adjacent Canada. Like other hide beetles, it is associated with decomposing animal remains in advanced stages of decay.
Trox frontera
Trox frontera is a hide beetle in the family Trogidae, first described by Vaurie in 1955. It is currently treated as a synonym of Glyptotrox frontera. Members of this genus are cryptic beetles that specialize in consuming dried animal remains, including skin, hair, feathers, and connective tissue. They are among the final colonizers of carcasses, arriving after most other insects have departed.
Trox paulseni
Trox paulseni is a hide beetle in the family Trogidae, described by Brett C. Ratcliffe in 2016. It is currently recognized as a synonym of Glyptotrox paulseni. Like other trogids, it belongs to a group of beetles specialized in consuming dried animal remains. The species has been recorded from Kansas and Nebraska in the central United States.
Trox tuberculatus
hide beetle
Trox tuberculatus is a hide beetle in the family Trogidae, a group of scarabaeoid beetles specialized in feeding on dried animal remains. The species occurs in the Nearctic region, with records from multiple U.S. states. Like other Trogidae, it is associated with the late stages of carcass decomposition, consuming dried skin, hair, feathers, and connective tissue. The beetle exhibits characteristic defensive behaviors including thanatosis (death-feigning) and debris-covering that render it cryptic and difficult to detect.
Trupanea pseudovicina
Trupanea pseudovicina is a species of tephritid fruit fly described by Hering in 1942. The species is known from very few observations and limited published records. It belongs to a genus whose members are commonly associated with plants in the Asteraceae family.
Trypanalebra
Trypanalebra is a genus of leafhoppers in the family Cicadellidae, subfamily Typhlocybinae, and tribe Alebrini. It was established by Young in 1952. Members of this genus belong to the diverse group of typhlocybine leafhoppers, which are generally small, delicate insects often associated with feeding on plant vascular tissues. The genus is part of the economically important leafhopper family, though specific ecological details for Trypanalebra remain poorly documented in published literature.
Trypanalebra balli
Trypanalebra balli is a species of leafhopper in the family Cicadellidae, described by David A. Young in 1957. The species belongs to the subfamily Typhlocybinae, a group commonly known as typhlocybine leafhoppers. It is one of at least two species in the genus Trypanalebra, which is distributed in the Americas. The specific epithet honors George E. Ball, a renowned carabidologist. Distribution records indicate occurrence in the southwestern United States (Arizona) and parts of Mexico (Jalisco, Veracruz, Yucatán).
Tsalia berneri
Tsalia berneri is a species of mayfly in the family Ephemerellidae, originally described as Ephemerella berneri by Allen & Edmunds in 1958. The genus Tsalia was later established to accommodate this and related species based on distinctive morphological features. This Nearctic species is known from limited records in North America. Like other members of Ephemerellidae, it is a small to medium-sized mayfly with aquatic nymphal stages.
Tupiocoris similis
Tupiocoris similis is a species of plant bug in the family Miridae, originally described as Dicyphus similis by Kelton in 1980. It belongs to a genus of predatory or phytophagous true bugs distributed across the Nearctic region. The species has been documented in Canada (Ontario) and the United States, with distribution records indicating presence in Nearctic regions including Beringia and California. As a member of the Miridae, it shares the family's characteristic piercing-sucking mouthparts and hemelytral wing structure typical of true bugs.
Twiningia
Twiningia is a genus of leafhoppers in the family Cicadellidae, subfamily Deltocephalinae, and tribe Platymetopiini. It was established by Ball in 1931. The genus belongs to the diverse Membracoidea superfamily within the true bugs (Hemiptera). Members of this genus are small to medium-sized cicadellid insects found primarily in the Nearctic region.
Tylosis puncticollis
Tylosis puncticollis is a species of longhorned beetle (family Cerambycidae) described by Henry Walter Bates in 1885. It belongs to the tribe Trachyderini, a group of robust, often colorful cerambycids commonly known as trachyderines. The genus Tylosis is restricted to the Americas, with species distributed from the southwestern United States through Mexico. Like other members of its genus, T. puncticollis likely exhibits the characteristic elongated body form and long antennae typical of cerambycids, though specific morphological details distinguishing it from congeners require close examination.
Tytthus fuscicornis
Tytthus fuscicornis is a species of plant bug in the family Miridae, described by Thomas J. Henry in 2012. It is known from California and New Mexico in the southwestern United States. As a member of the genus Tytthus, it belongs to a group of minute pirate bugs that are generally recognized as predators of other small arthropods.
Tytthus uniformis
Tytthus uniformis is a species of plant bug in the family Miridae, described by Henry in 2012. It belongs to the genus Tytthus, a group of small predatory mirids known for their association with leafhopper prey. The species is documented from the southwestern United States.
Ula elegans
Ula elegans is a species of crane fly in the family Pediciidae, first described by Osten Sacken in 1869. It is a Nearctic species found across northern and western North America. As a member of the Pediciidae, it belongs to a family of delicate, long-legged flies often associated with moist habitats.
Untomia
Untomia is a genus of small moths in the family Gelechiidae, subfamily Anacampsinae. The genus was established by Busck in 1906 and contains nine described species distributed primarily in the Americas. Species exhibit variation in wing pattern, with some featuring distinctive longitudinal stripes or maculation. The genus is part of the diverse gelechioid radiation, though individual species remain poorly documented in terms of biology and ecology.
Utetes
Utetes is a genus of braconid wasps in the subfamily Opiinae, comprising larva-pupal parasitoids of tephritid fruit flies. Species such as U. anastrephae and U. tabellariae are native to the Americas and have been studied for their potential in biological control of agricultural pests. These wasps develop internally within host larvae and exhibit competitive advantages over sympatric parasitoid species.
Vacusus
Vacusus is a genus of antlike flower beetles in the family Anthicidae, established by Casey in 1895. The genus comprises approximately six described species distributed across the Americas, including North America, the Caribbean, and Central America. Members of this genus exhibit the characteristic ant-mimicking morphology typical of Anthicidae, with elongated bodies and pronotal constrictions that create a superficial resemblance to ants. The genus has accumulated over 950 observations on iNaturalist, indicating moderate documentation of its species in the field.
Valgus seticollis
Bristly-necked Valgus
Valgus seticollis is a small scarab beetle in the subfamily Cetoniinae, tribe Valgini. It is one of two Valgus species native to North America, distinguished from the more widespread V. canaliculatus by its setose (bristly) pronotum. Adults are flower visitors, with males possessing brush-like mouthparts adapted for nectar feeding. The species is associated with termite colonies, where larvae develop in wood within termite galleries.
Vanderwulpia
Vanderwulpia is a genus of tachinid flies (Diptera: Tachinidae) established by Townsend in 1891. The genus contains three described species: V. atrophopodoides, V. sequens, and V. sororcula. As members of the tribe Minthoini within subfamily Tachininae, these flies are parasitoids, though specific host associations remain poorly documented.
Vespula infernalis
cuckoo yellowjacket, American cuckoo yellowjacket
Vespula infernalis is an obligate social parasite (inquiline) that invades and usurps colonies of other yellowjacket species, primarily Vespula acadica in North America. Unlike most parasitic wasps, it exhibits intensely aggressive behavior during colony takeover, using specialized morphological adaptations including a large, heavily curved stinger to subdue host workers. The species lacks a worker caste and cannot build nests or rear its own young, instead forcing host workers to feed and care for its brood through dominance behaviors including mauling and forced trophallaxis.
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admirandus
Vitacea admirandus is a clearwing moth in the family Sesiidae, first described by Edwards in 1882. As a member of the genus Vitacea, it belongs to a group of moths whose larvae are specialized borers in woody plants, particularly grapevines (Vitis spp.). The genus is notable for containing economically significant pests of cultivated grapes in North America. Adults are diurnal and wasp-like in appearance, a common mimicry strategy in this family.
Vitisiella
Grape Midge Galls
Vitisiella is a genus of gall midges in the family Cecidomyiidae, established by Fedotova & Kovalev in 2003. Species in this genus are associated with grape plants (Vitis spp.), inducing characteristic galls on their hosts. The genus is known from North America, with records from the northeastern United States. The common name 'Grape Midge Galls' reflects their ecological association with cultivated and wild grapes.
Walckenaeria bifida
Walckenaeria bifida is a species of dwarf spider in the family Linyphiidae, described by Millidge in 1983. It belongs to a genus of small sheet-web weaving spiders distributed primarily in the Northern Hemisphere. The species epithet 'bifida' refers to a cleft or divided structure, likely describing a morphological feature of this spider. As with many Linyphiidae, it is a small-bodied spider that constructs sheet webs for prey capture.
Walckenaeria columbia
dwarf spider
Walckenaeria columbia is a species of dwarf spider (subfamily Erigoninae) in the sheet-web weaving family Linyphiidae. Described by Millidge in 1983, this small arachnid is distributed across the United States and Canada. As a member of the Erigoninae, it likely constructs simple sheet webs or inhabits vegetation in ground-level habitats, though specific behavioral and ecological details remain poorly documented.
Wormaldia arizonensis
Wormaldia arizonensis is a species of caddisfly in the family Philopotamidae, originally described by Ling in 1938. It belongs to the second largest genus in its family, with approximately 175 extant species worldwide. The species is known from the southwestern United States and Mexico. As with other philopotamid caddisflies, it is presumed to have aquatic larval stages and terrestrial adult stages, though specific details of its biology remain poorly documented.
Xantholobus
Xantholobus is a genus of treehoppers in the family Membracidae, established by Van Duzee in 1908. The genus belongs to the tribe Smiliini within the subfamily Smiliinae and contains approximately 14 described species. Like other treehoppers, members of this genus possess an enlarged and often elaborately modified pronotum that extends over the thorax, a defining characteristic of the family Membracidae. Species in this genus are found in the Nearctic region, with records from the southwestern United States and Mexico.
Xantholobus altus
Xantholobus altus is a species of treehopper in the family Membracidae, described by Ball in 1932. It belongs to the tribe Smiliini, a group of Nearctic treehoppers characterized by pronounced pronotal modifications. The genus Xantholobus contains multiple species distributed in western and southwestern North America. Xantholobus altus has been recorded from Arizona.