Canada
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Tetropium cinnamopterum
Eastern Larch Borer
Tetropium cinnamopterum is a native North American cerambycid beetle in the tribe Tetropiini. Adults are distinguished from the closely related T. parvulum by eye shape, scutellar structure, external genitalia, and pronotal puncture number; larvae are distinguished by urogomphi morphology. The species has been recorded from various conifer hosts, with larvae developing in conifer wood. It is transcontinental in Canada and occurs sympatrically with invasive T. fuscum in Atlantic Canada, where cross-attraction to the aggregation pheromone fuscumol may occur. Both sexes respond to (S)-fuscumol synergized by host monoterpenes and ethanol.
Theridion neomexicanum
Theridion neomexicanum is a species of cobweb spider in the family Theridiidae. It is found in the United States and Canada. As a member of the Theridiidae, it constructs irregular, three-dimensional webs typical of the family. The species was described by Banks in 1901.
Thes bergrothi
Ridge-winged Fungus Beetle
Thes bergrothi is a small beetle in the family Latridiidae, commonly known as the Ridge-winged Fungus Beetle. This species is distributed across several Canadian provinces including British Columbia, Manitoba, New Brunswick, Nova Scotia, and Saskatchewan. Like other members of its family, it is associated with fungal habitats.
Thrinax dubitata
Thrinax dubitata is a species of sawfly in the family Tenthredinidae, originally described as Hemitaxonus dubitatus by Norton in 1862. It is one of approximately 40 species in the genus Thrinax, a group of small to medium-sized sawflies primarily distributed in the Holarctic region. The species is recorded from eastern and central Canada, with observations spanning Manitoba to the Atlantic provinces. As with most Tenthredinidae, adults are likely herbivorous or nectar-feeding, though specific ecological details remain poorly documented.
Timarcha intricata
Intricate Leaf Beetle
Timarcha intricata is a species of leaf beetle in the family Chrysomelidae, first described by Haldeman in 1853. It is found in North America, with distribution records from Canada (Alberta and British Columbia) and the United States. The species is commonly known as the Intricate Leaf Beetle. Like other members of the genus Timarcha, it belongs to a group of leaf beetles that are primarily associated with feeding on plant foliage.
Tinea irrepta
A small moth species in the fungus moth family Tineidae, described by Braun in 1926. Known from scattered records across central Canada. As a member of the genus Tinea, it likely shares the family's characteristic larval habits of feeding on keratinaceous materials, though specific details for this species remain poorly documented.
Tipula ignobilis
Tipula ignobilis is a species of large crane fly in the family Tipulidae. It is known from Canada and the United States, with records spanning from Manitoba and Ontario south to Kansas, Tennessee, and South Carolina. As a member of the genus Tipula, it belongs to one of the most species-rich genera of crane flies in North America.
Torymus fagopirum
Torymus fagopirum is a chalcid wasp in the family Torymidae. The species has been documented as a parasitoid of gall-forming insects, including psyllids. It is known from multiple provinces across Canada. Torymus species in general are associated with galls, where they develop as parasitoids of the gall inducers.
Torymus flavicoxa
Torymus flavicoxa is a parasitoid wasp in the family Torymidae, a group known for attacking insects within plant galls. The species has been recorded as a parasite of psyllid nymphs inhabiting hackberry leaf galls. It is distributed across Canada from British Columbia to Ontario.
Torymus tubicola
Torymus tubicola is a species of chalcid wasp in the family Torymidae. The species is known to parasitize gall-forming insects, including psyllid nymphs within plant galls. It has been recorded from multiple provinces across Canada.
Treptoplatypus wilsoni
Treptoplatypus wilsoni is a species of weevil in the family Curculionidae, described by Bright and Skidmore in 2002. The species belongs to the genus Treptoplatypus, which comprises ambrosia beetles that typically cultivate fungal symbionts in wood galleries. Based on the taxonomic placement and known biology of related species in this genus, T. wilsoni is likely associated with woody substrates, though specific ecological details remain poorly documented. The species has been recorded from British Columbia, Canada.
Trichalophus alternatus
Trichalophus alternatus is a species of broad-nosed weevil in the family Curculionidae, first described by Say in 1831. It is a member of the subfamily Entiminae, which comprises the so-called 'true' weevils characterized by their elongated snouts. The species has been documented across western North America from Alaska to Colorado.
Trichapion modicum
Trichapion modicum is a species of straight-snouted weevil in the family Brentidae. The genus Trichapion was established to accommodate species previously placed in Apion, distinguished by morphological features of the rostrum and antennae. This species has been documented in Manitoba, Canada. Like other brentid weevils, it possesses an elongated rostrum and elbowed antennae. Specific ecological details for this species remain poorly documented.
Trichapion nigrum
Trichapion nigrum is a species of straight-snouted weevil in the family Brentidae, first described by Herbst in 1797. It belongs to a genus of small weevils characterized by elongated rostrums. The species has been documented in eastern Canada, with records from New Brunswick, Ontario, and Quebec. Like other members of Brentidae, it is likely associated with plant material, though specific ecological details remain poorly documented.
Trichapion reconditum
Trichapion reconditum is a species of straight-snouted weevil in the family Brentidae. It is a small beetle with an elongated rostrum, characteristic of the family. The species has been documented in eastern Canada, with records from New Brunswick, Ontario, and Quebec. It appears to be rarely encountered, with very few observations in citizen science databases.
Tricholochmaea cavicollis
Cherry leaf beetle
Tricholochmaea cavicollis, known as the cherry leaf beetle, is a skeletonizing leaf beetle in the family Chrysomelidae. The species occurs across North America, with records from western and central Canadian provinces including Alberta, British Columbia, and Manitoba. As a member of the skeletonizing leaf beetle group, it feeds on leaf tissue between veins.
Trichomma maceratum
Trichomma maceratum is a species of parasitoid wasp in the family Ichneumonidae, first described by Cresson in 1879. The genus Trichomma belongs to the ichneumonid subfamily Pimplinae, a group characterized by ectoparasitic larvae that develop on hosts concealed in plant material or soil. This species has been recorded in western and central Canada, with observations spanning prairie and agricultural habitats. Very little is known about its biology, host associations, or ecological role.
Trichordestra liquida
cutworm moth, dart moth
Trichordestra liquida is a species of cutworm or dart moth in the family Noctuidae. It occurs in North America, with distribution records from Alberta and Saskatchewan in Canada. The species was described by Grote in 1881 and is assigned MONA/Hodges number 10308.
Trieces integer
Trieces integer is a species of ichneumonid wasp described by Townes & Townes in 1959. The genus Trieces belongs to the family Ichneumonidae, one of the largest families of parasitoid wasps. Very little published biological information exists for this species. The genus name Trieces derives from Greek, with 'tri-' meaning three and 'eces' likely referring to some morphological feature, though the specific meaning of 'integer' (Latin for 'whole' or 'intact') in this context is not documented in available sources.
Trigonarthris proxima
Proximal Long-horned Beetle
Trigonarthris proxima is a species of flower longhorn beetle in the family Cerambycidae. It is native to North America, with records from Canada including Manitoba, New Brunswick, Nova Scotia, and Ontario. The species was first described by Thomas Say in 1824 under the basionym Leptura proxima. It belongs to the subfamily Lepturinae, a group commonly known as flower longhorns due to their frequent association with flowers.
Triplax cuneata
Triplax cuneata is a species of pleasing fungus beetle in the family Erotylidae, described by Boyle in 1954. The genus Triplax comprises small beetles associated with fungi, particularly mushrooms and polypores. T. cuneata has been recorded from western North America including the Canadian provinces of Alberta and British Columbia. Like other members of its genus, it likely inhabits fungal fruiting bodies where it feeds and reproduces.
Trixagus carinicollis
Trixagus carinicollis is a small false click beetle in the family Throscidae. It is found in North America, with records from Canada including Alberta, British Columbia, and New Brunswick. The species was described by Schaeffer in 1916.
Trypoxylon collinum rubrocinctum
Trypoxylon collinum rubrocinctum is a subspecies of potter wasp in the family Crabronidae. It is native to North America, with confirmed records from Ontario, Canada. As a member of the genus Trypoxylon, it is presumed to construct mud nests provisioned with paralyzed spiders, though specific biological details for this subspecies remain poorly documented. The subspecies was described by Packard in 1867.
Tulsa finitella
Tulsa finitella is a species of snout moth in the family Pyralidae, subfamily Phycitinae. First described by Francis Walker in 1863, this species is known from limited distribution records in the Canadian Prairie provinces. The genus Tulsa contains approximately 15 species, with T. finitella being among the more poorly documented members. Available occurrence data suggests it inhabits grassland and prairie environments, though specific ecological details remain sparse in the scientific literature.
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.
Uloma impressa
Uloma impressa is a species of darkling beetle in the family Tenebrionidae, first described by Melsheimer in 1846. The species belongs to a large family of beetles commonly known as darkling beetles, which are characterized by their hardened forewings and typically dull coloration. As with many Tenebrionidae species, detailed ecological and behavioral information remains limited in the available literature.
Urgleptes facetus
Urgleptes facetus is a species of longhorn beetle in the family Cerambycidae, described by Thomas Say in 1827. The species belongs to the subfamily Lamiinae and tribe Acanthocinini. It is distributed across parts of eastern North America, with records from Canada (Ontario, Québec) and the United States. Like other members of the genus Urgleptes, this is a small to medium-sized cerambycid beetle.
Urocerus cressoni
Black-and-red Horntail
Urocerus cressoni is a large wood-boring wasp in the family Siricidae, commonly known as the Black-and-red Horntail. Females range from 37–50 mm in length, males 18–37 mm. The species is native to North America and has been recorded across Canada from Nova Scotia to Manitoba. Like other horntails, females possess a prominent ovipositor for drilling into wood to deposit eggs, along with a shorter dorsal spine (cornus) that gives the family its common name. The species is non-venomous and poses no threat to humans.
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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exigua
dwarf spider
Walckenaeria exigua is a species of dwarf spider in the family Linyphiidae, first described by Millidge in 1983. It belongs to a genus of small sheet-web weavers characterized by their diminutive size and specialized genital morphology. The species has been documented across much of North America, with confirmed records from both the United States and Canada. Like other members of Linyphiidae, it constructs flat sheet webs with a retreat area, though specific web architecture details for this species remain undocumented.
Walckenaeria palustris
Walckenaeria palustris is a species of dwarf spider in the family Linyphiidae, described by Millidge in 1983. The specific epithet 'palustris' (Latin for 'of the marsh') suggests association with wetland or marshy habitats. Like other members of the genus Walckenaeria, it is a small-bodied spider with characteristic genitalic structures used for species identification. The species has been recorded in Canada based on available distribution data.
Waldheimia carbonaria
Waldheimia carbonaria is a species of sawfly in the family Tenthredinidae, first described by Cresson in 1880. It is a member of the suborder Symphyta, the group of Hymenoptera that includes sawflies and horntails, which lack the narrow waist characteristic of wasps, bees, and ants. The genus Waldheimia contains relatively few species, and W. carbonaria is among the better-documented members of this genus in North America. Like other Tenthredinidae, the larvae are likely herbivorous, though specific host plant associations remain poorly documented.
Xanthippus brooksi
Xanthippus brooksi is a species of band-winged grasshopper in the family Acrididae, first described by Vickery in 1967. It belongs to the subfamily Oedipodinae and tribe Hippiscini. The species is found in North America, with confirmed records from the Northwest Territories of Canada. Information on its biology and ecology remains limited in published literature.
Xestobium gaspensis
Gaspé Death-watch Beetle
Xestobium gaspensis is a small beetle species in the family Ptinidae, originally described from eastern Canada in 1975. The species is known from a limited number of records in Nova Scotia, Ontario, and Québec. It belongs to a genus commonly associated with wood-boring habits, though specific biology for this species remains poorly documented.
Xorides stigmapterus stigmapterus
Xorides stigmapterus stigmapterus is a subspecies of ichneumonid wasp in the genus Xorides. It belongs to a group of parasitoid wasps that attack wood-boring beetle larvae. The genus Xorides is part of the family Ichneumonidae, one of the largest families of Hymenoptera. Records indicate this subspecies occurs in Canada.
Xylena thoracica
Acadian Swordgrass Moth
Xylena thoracica, commonly known as the Acadian Swordgrass Moth, is a species of cutworm moth in the family Noctuidae. It is found in North America, with records from Canada (Alberta, Manitoba, Saskatchewan) and the United States (Vermont). The species was first described by Putnam-Cramer in 1886 and is assigned Hodges number 9875.
Xyletinus fucatus
Xyletinus fucatus is a small beetle species in the family Ptinidae (formerly Anobiidae), described by John Lawrence LeConte in 1865. The species is recorded from multiple Canadian provinces including British Columbia, Manitoba, and New Brunswick, indicating a transcontinental distribution across northern North America. As a member of the subfamily Xyletininae, it belongs to a group commonly known as deathwatch beetles or furniture beetles, though specific ecological details for this species remain poorly documented.
Xylopinus saperdoides
Decaying Darkling Beetle
Xylopinus saperdoides is a darkling beetle in the family Tenebrionidae, commonly known as the Decaying Darkling Beetle. It is native to eastern North America and has been recorded in multiple Canadian provinces. The species is moderately well-documented, with nearly 1000 observations on iNaturalist.
Xylotrechus schaefferi
Xylotrechus schaefferi is a species of longhorn beetle in the family Cerambycidae, described by Schott in 1925. It belongs to the tribe Clytini within the subfamily Cerambycinae. The species is known from multiple Canadian provinces including Manitoba, Ontario, and Québec. Like other members of its genus, it is likely associated with woody vegetation, though specific biological details remain poorly documented in the available literature.
Xysticus acquiescens
Xysticus acquiescens is a species of ground crab spider in the family Thomisidae, first described by Emerton in 1919. As a member of the genus Xysticus, it is an ambush predator that relies on camouflage and patience rather than web-building to capture prey. The species is known from the Canadian prairies and adjacent regions of the northern United States. Like other Xysticus species, it exhibits typical crab spider morphology with laterally extended legs and a flattened body adapted for hiding in vegetation or ground cover.
Xysticus gulosus
Xysticus gulosus is a species of crab spider in the family Thomisidae, described by Keyserling in 1880. It belongs to the genus Xysticus, a diverse group of ground-dwelling ambush predators commonly known as ground crab spiders. The species is distributed across North America, with confirmed records from the Canadian provinces of Alberta, Manitoba, and Saskatchewan. Like other members of its genus, it likely employs a sit-and-wait hunting strategy, using its enlarged front legs to capture prey.
Xysticus pellax
Xysticus pellax is a species of crab spider in the family Thomisidae, first described by O. Pickard-Cambridge in 1894. It is native to North America, with records from Canada and the United States. Like other members of its genus, it is a ground-dwelling ambush predator.
Yukonodelphax kendallae
Yukonodelphax kendallae is a species of planthopper in the family Delphacidae, first described by Wilson in 1992. It is a small, winged insect belonging to a group known for their association with grasses and sedges. The species is known from northern North America, with confirmed records from Yukon and Alberta.
Zelotes duplex
ground spider
Zelotes duplex is a species of ground spider in the family Gnaphosidae, first described by Chamberlin in 1922. It is found in the United States and Canada. As a member of Zelotes, it belongs to a large genus of active hunting spiders commonly known as ground spiders.
Zenophleps alpinata
Alpine Zenophleps
Zenophleps alpinata is a small geometrid moth described by Samuel E. Cassino in 1927. The species is known from western Canadian provinces, with records from Alberta, British Columbia, Saskatchewan, and Manitoba. Adults have a wingspan of approximately 25 millimetres. The specific epithet 'alpinata' suggests an association with alpine or high-elevation habitats.