Monotypic-genus
Guides
Abachrysa eureka
Eureka Green Lacewing
Abachrysa eureka is a species of green lacewing and the sole member of the genus Abachrysa. It belongs to the family Chrysopidae, a group of predatory insects valued for their role in biological control. The species was originally described by Nathan Banks in 1931 under the name Chrysopa eureka before being transferred to the monotypic genus Abachrysa.
Abrenthia cuprea
Abrenthia cuprea is a small sedge moth and the sole species in the genus Abrenthia. It was described by August Busck in 1915 and is known from scattered records in North America, including Florida, Illinois, and Iowa. The species belongs to the family Glyphipterigidae, a group of small moths often associated with wetland habitats. The specific epithet 'cuprea' refers to the coppery coloration of the adult.
Acentria
watermilfoil moth, water veneer
Acentria is a monotypic moth genus in the family Crambidae containing a single species, Acentria ephemerella. The genus is notable for extreme sexual dimorphism in wing development and for having the only known fully aquatic adult female moths. Most females are flightless with rudimentary wings and spend their entire lives underwater, while males are fully winged and terrestrial. The species is native to Europe and has been introduced to North America.
Acmaeopsoides rufula
Acmaeopsoides rufula is a longhorn beetle and the sole species in its genus. It is a member of the subfamily Lepturinae, commonly known as flower longhorns. The species is restricted to North America, with records from Canada and the United States. It is rarely encountered, with limited observational data available.
Acrodectes philopagus
Alpine Shieldback
Acrodectes philopagus, commonly known as the Alpine Shieldback, is the sole described species in the monotypic genus Acrodectes. It is a shield-backed katydid in the family Tettigoniidae, first described by Rehn and Hebard in 1920. The species is known from high-elevation habitats in California. As with other tettigoniids, it possesses enlarged hind legs adapted for jumping and long antennae.
Acromacer
pine flower snout beetles
Acromacer is a genus of weevils in the family Nemonychidae, commonly known as pine flower snout beetles. The genus contains a single described species, Acromacer bombifrons. Nemonychidae represents one of the most ancient lineages of weevils, with members typically associated with conifer reproductive structures. The genus was established by Kuschel in 1989.
Acsala anomala
Rockslide Lichen Moth
Acsala anomala, commonly known as the Rockslide Lichen Moth, is a rare and poorly known species of lichen moth in the family Erebidae. It represents the sole member of its genus and the monotypic tribe Acsalina. The species is endemic to Alaska, where it inhabits rocky alpine environments. Its biology and ecology remain largely undocumented due to its restricted range and apparent rarity.
Adanarsa intransitella
Adanarsa intransitella is a snout moth (Pyralidae: Phycitinae) and the sole species in its monotypic genus. It was originally described as Rhodophaea intransitella by Dyar in 1905, then transferred to the new genus Adanarsa by Heinrich in 1956. The species is known from the southwestern United States.
Alexicles aspersa
alexicles moth
Alexicles aspersa, the alexicles moth, is a tiger moth and the sole species in its genus. It is endemic to the southwestern United States, with records limited to New Mexico and Arizona. The species was described by Augustus Radcliffe Grote in 1883. Little is known of its biology beyond its restricted geographic range.
Allocyclosa
trashline orb weaver
Allocyclosa is a monotypic genus of orb-weaver spiders in the family Araneidae, containing only Allocyclosa bifurca. Originally described as Cyrtophora bifurca in 1887, it was transferred to its own genus in 1999 based on distinctive morphological features. The genus is notable for being the only Cyclosa-like species north of Mexico with a forked abdominal tip, and for its unusual reproductive biology where males are exceptionally rare.
Amerinus linearis
Amerinus linearis is a species of ground beetle in the family Carabidae, and the sole member of its genus. It was described by LeConte in 1863. The species belongs to the tribe Stenolophini within the subfamily Harpalalinae.
Amorpha juglandis
walnut sphinx
Amorpha juglandis, the walnut sphinx, is the sole species in the monotypic moth genus Amorpha (family Sphingidae). The species is notable for its caterpillar's unique defensive behavior: producing high-pitched whistles by expelling air through specialized abdominal spiracles. This acoustic defense has been experimentally shown to startle avian predators. Adults are nocturnal and active primarily during early night hours.
Ampumixis
Ampumixis is a monotypic genus of riffle beetles in the family Elmidae, containing the single species Ampumixis dispar. The genus was described by Sanderson in 1954 and is endemic to the Western United States, specifically the region between California and Oregon. Adults are small, measuring approximately 2.1–2.5 mm in length.
Anatralata versicolor
Venerable Bantam
Anatralata versicolor is a small moth species belonging to the family Crambidae. It is the sole member of its genus, making it monotypic. The species is native to western North America, with a range extending from California through Idaho to British Columbia. It occupies diverse habitats including mountainous regions and low-elevation coastal grasslands in central California.
Anchycteis
Anchycteis is a genus of toe-winged beetles in the family Ptilodactylidae. The genus contains a single described species, A. velutina. Toe-winged beetles are characterized by their distinctive lobed tarsi. The family Ptilodactylidae is a small group of beetles with limited ecological documentation.
Annegialia
Annegialia is a genus of aphodiine dung beetles established by Howden in 1971. The genus contains a single described species, A. ataeniformis. It belongs to the tribe Eupariini within the subfamily Aphodiinae of Scarabaeidae.
Anoplognatho dunnianus
Anoplognatho dunnianus is a species of rhinoceros beetle in the family Scarabaeidae. It is the sole described species in the genus Anoplognatho. The species occurs in the southwestern United States and northern Mexico.
Anthracopteryx hiemalis
Anthracopteryx hiemalis is a small click beetle (family Elateridae) and the sole species in its monotypic genus. It is notable for winter activity, a rare trait among click beetles. The species has an extremely restricted endemic range in the Front Range of Colorado, USA, spanning from Laramie south to Westcliffe. As of 2017, it was documented in only two observations on iNaturalist and had no prior photographic records on BugGuide.net, indicating it is among the most poorly documented North American elaterids.
Anycteola fotelloides
Anycteola fotelloides is the sole species in the monotypic moth genus Anycteola, described by Barnes and McDunnough in 1916 and placed in the family Noctuidae. Originally described as Stilbia fotelloides, it was later transferred to the new genus Anycteola erected by Barnes and Benjamin in 1929. The species is known only from Arizona, USA, and is classified within the subfamily Acronictinae.
Aon noctuiformis
Aon Moth
Aon noctuiformis, commonly known as the aon moth, is the sole species in the monotypic genus Aon within the family Erebidae. First described by Berthold Neumoegen in 1892, this moth is known exclusively from the US state of Texas. The species epithet 'noctuiformis' suggests a resemblance to owlet moths (Noctuidae), though it belongs to the related family Erebidae.
Apachea barberella
Apachea barberella is a moth species and the sole member of the genus Apachea in the family Depressariidae. Described by August Busck in 1902, it is known from scattered records across western North America. The species remains poorly documented with only two observations recorded on iNaturalist.
Apagodiplosis
Apagodiplosis is a genus of gall midges (family Cecidomyiidae) established by Gagné in 1973. The genus contains a single described species, A. papyriferae. Gall midges in this family are small, delicate flies known for inducing plant galls during larval development.
Apanisagrion lais
Black-and-white Damsel
Apanisagrion lais is a damselfly species in the family Coenagrionidae, commonly known as the Black-and-white Damsel. It is the sole species in its genus and is recognized by its distinctive black-and-white coloration. The species occurs in Middle America and North America, with observations documented across its range.
Apiocera
Flower-loving Flies
Apiocera is the sole genus in the family Apioceridae, comprising approximately 150 species of flies commonly known as flower-loving flies. The genus is divided into four subgenera, each restricted to a different continent: Apiocera (Australia), Ripidosyrma (southern Africa), Pyrocera (North America), and Anypenus (South America). Despite their common name, most species do not visit flowers. The family was historically broader, with other genera now transferred to Mydidae.
Aplos simplex
Velvet-striped planthopper
Aplos simplex is the sole species in the genus Aplos, a planthopper in the family Issidae. Formerly classified under Thionia, this species occurs widely across the eastern United States and has established as an invasive population in Northern Italy and Austria. As an issid planthopper, it belongs to the hemipteran group Auchenorrhyncha, characterized by piercing-sucking mouthparts and often reduced wings.
Apocrisias thaumasta
Apocrisias thaumasta is the sole species in the monotypic moth genus Apocrisias, described by John G. Franclemont in 1966. The species belongs to the family Erebidae and is known from a restricted range in the southwestern United States and Mexico. It is classified within the subfamily Arctiinae (tiger moths), though detailed biological information remains limited due to its rarity and narrow distribution.
Apsaphida eremna
Apsaphida eremna is a rare noctuid moth and the sole species in its monotypic genus. It is known exclusively from Arizona, where it was first described by John G. Franclemont in 1973. The species remains poorly documented with few verified observations.
Apsilocephala
Apsilocephala is a genus of flies in the family Apsilocephalidae, established by Kröber in 1914. The genus contains one extant species, Apsilocephala longistyla, and two fossil species: Apsilocephala pusilla and Apsilocephala vagabunda. The family Apsilocephalidae is a small, poorly known group within the order Diptera.
Apterobittacus
Apterobittacus is a genus of hangingflies in the family Bittacidae, established by MacLachlan in 1893. The genus contains a single described species, A. apterus. Hangingflies (Bittacidae) are predatory insects characterized by their habit of hanging from vegetation using their forelegs while capturing prey with their mid- and hind legs. The genus name "Apterobittacus" references the reduced or absent wings ("apterus" = wingless) that distinguishes this group from other bittacids.
Archodontes
Archodontes is a monotypic genus of root-boring beetles in the family Cerambycidae, containing the single species Archodontes melanopus. The genus is endemic to Central America and the south-eastern United States, where larvae bore into the roots of oaks and other hardwood trees. Adults are large, robust beetles with distinctive spiny thoracic margins and dark coloration.
Arcutelphusa talladega
Arcutelphusa talladega is a species of moth in the family Gelechiidae. It is the sole member of its genus. The species was described in 2008 and is known from a limited distribution in the southeastern United States.
Arenochroa flavalis
Arenochroa flavalis is a small moth species and the sole member of its genus. It belongs to the family Crambidae, commonly known as grass moths. The species is found in arid regions of the southwestern United States and Mexico. It was first described by Fernald in 1894, originally placed in the genus Loxostege.
Argyrolacia bifida
Argyrolacia bifida is a species of moth in the family Gelechiidae, and the sole member of its genus. It was described by Keifer in 1936 and is known from California, North America. As a gelechiid moth, it belongs to a large family of small moths commonly known as twirler moths. The genus name Argyrolacia derives from Greek roots suggesting silver (argyro-) and some form of covering or garment (lacia), though the specific meaning and relevance to the species' appearance is not documented in available sources.
Aristaria theroalis
Aristaria theroalis is the sole species in the monotypic genus Aristaria, a moth in the family Erebidae. It is found in the United States and Costa Rica. The species was first described by Francis Walker in 1859, originally placed in the genus Bleptina. It belongs to the subfamily Hypeninae, commonly known as snout moths.
Aritaerius
Aritaerius is a genus of clown beetles (family Histeridae) containing a single described species, A. pallidus. The genus was established in 2004 by Kovarik & Tishechkin and is classified within the subfamily Haeteriinae, a group known for associations with social insects. As a member of the Histeridae, it shares the family's characteristic compact body form and clubbed antennae.
Arizonacritus
Arizonacritus is a genus of clown beetles (family Histeridae) described in 2013. The genus contains a single described species, Arizonacritus talayesvai. It belongs to the tribe Acritini within the subfamily Abraeinae. The genus name references Arizona, indicating a geographic association with this region.
Astyleiopus variegatus
Variegated Longhorned Beetle
Astyleiopus variegatus is a species of longhorned beetle in the family Cerambycidae, representing the sole member of its monotypic genus. It has been reared from dead branches of red buckeye (Aesculus pavia) in Missouri, constituting a documented larval host record. The species is distributed across eastern and central North America, with records from Canada and the United States.
Atrazonotus
Atrazonotus is a monotypic genus of dirt-colored seed bugs in the family Rhyparochromidae, established by Slater & Ashlock in 1966. The genus contains a single described species, A. umbrosus. These true bugs belong to the tribe Gonianotini within the subfamily Rhyparochrominae.
Atropsocus
common barklice
Atropsocus is a genus of barklice in the family Psocidae, established by Mockford in 1993. It contains a single described species, A. atratus. Members of this genus are small, winged insects that inhabit bark and foliage surfaces, feeding on microflora such as lichens, algae, and fungal spores.
Atylostagma
Atylostagma is a monotypic genus of longhorn beetles in the family Cerambycidae, established by White in 1853. The genus contains a single described species, Atylostagma politum. It belongs to the tribe Elaphidiini within the subfamily Cerambycinae.
Aufeius
scentless plant bugs
Aufeius is a genus of scentless plant bugs in the family Rhopalidae, established by Stål in 1870. The genus contains a single described species, Aufeius impressicollis. Members of this genus lack the scent glands typical of many true bugs. The genus is part of the tribe Harmostini within the subfamily Rhopalinae.
Axenus arvalis
Axenus arvalis is the sole species in the monotypic genus Axenus, a noctuid moth described by Augustus Radcliffe Grote in 1873. The species is endemic to the Pacific Northwest region of North America, with confirmed records from California and Oregon. Its narrow geographic range and monotypic status make it a distinctive element of the regional noctuid fauna.
Bajulata bajula
Bajulata bajula is a treehopper species in the family Membracidae, described by Goding in 1893. It belongs to the tribe Amastrini within the subfamily Smiliinae. The genus Bajulata is monotypic, containing only this species. Records indicate it occurs in Arizona.
Barberia affinitella
Barberia affinitella is a species of snout moth in the family Pyralidae, and the sole member of its genus. It was described by Harrison Gray Dyar Jr. in 1905. The species is found in the southern United States, ranging from California to Texas. As a member of the subfamily Phycitinae, it belongs to a diverse group of pyralid moths commonly known as snout moths due to their prominent labial palps.
Barrellus
Barrellus is a monotypic genus of jewel beetles (family Buprestidae) containing the single species Barrellus femoratus. The genus was established in 1996 by Nelson & Bellamy. Very little published information exists on this genus beyond its taxonomic description and placement within the Buprestidae.
Basiaeschna janata
Springtime Darner
Basiaeschna janata, the Springtime Darner, is a small, bluish dragonfly in the family Aeshnidae. It is the sole member of the monotypic genus Basiaeschna. This species is notable for its early seasonal flight period, appearing in spring when most other darner species have not yet emerged. It is widely distributed across North America.
Belonochilus
sycamore seed bug
Belonochilus is a monotypic genus of seed bugs in the family Lygaeidae, containing the single species B. numenius, commonly known as the sycamore seed bug. Native to North America, it has become invasive in Europe since its first detection in 2008. The species completes its entire life cycle on the seed balls of plane trees (Platanus spp.) and has been recorded from 17 European countries.
Belonochilus numenius
Sycamore Seed Bug, American Sycamore Seed Bug
Belonochilus numenius is a monotypic seed bug in the family Lygaeidae, native to North America and invasive in Europe since 2008. The species completes its entire life cycle on seed balls of Platanus species. It has spread rapidly across Europe through plant trade and wind dispersal, reaching 17 countries including a widespread distribution in North Macedonia by 2019. High population densities can cause nuisance aggregations in urban areas, though it is not considered harmful to host trees.
Bendisodes
Bendisodes is a monotypic moth genus in the family Erebidae, established by George Hampson in 1924. It contains a single species, Bendisodes aeolia, originally described by Druce in 1890. The genus is native to North America and is classified within the subfamily Calpinae. Its sole species is assigned MONA/Hodges number 8656.
Bendisodes aeolia
Bendisodes aeolia is a moth species in the family Erebidae, representing the sole member of the monotypic genus Bendisodes. Originally described by Druce in 1890 as Isogona aeolia, the species was later placed in its current genus by Hampson in 1924. It is distributed in North America.
Bertamyia notata
Bertamyia notata is the sole described species in the genus Bertamyia, a group of flat-footed flies within the family Platypezidae. The species occurs across a broad geographic range from Canada to Argentina in the Americas. It was originally described by Loew in 1866 under the name Callomyia notata. As a member of Platypezidae, it belongs to a family of small to medium-sized flies whose larvae typically develop in decaying organic matter, particularly fungi.
Bibarrambla allenella
Bog Bibarrambla Moth
Bibarrambla allenella is a small moth species and the sole member of its genus. It occurs in wetland habitats across northern and eastern North America. The species was first described by Walsingham in 1882 from specimens collected in the region.
Biblis hyperia
red rim, crimson-banded black, Southern Red Rim
Biblis hyperia is a brush-footed butterfly (family Nymphalidae) and the sole member of its genus. Adults display striking velvety-black forewings contrasted with gray hindwings bearing a distinctive pinkish-red marginal band. The species occurs from the southern United States through the Neotropics to Paraguay, with flight activity recorded primarily between March and November. Larvae feed on the spurge family vine Tragia volubilis.
Bistanta mexicana
Slim Mexican Mantis
Bistanta mexicana, commonly known as the Slim Mexican Mantis, is a native North American praying mantis species and the sole member of the monotypic genus Bistanta in family Thespidae. Originally described as Oligonyx mexicana, it has been reclassified into its own genus. The species occurs in California and the southwestern United States, where it inhabits dry, open habitats. It is one of five native mantis species recorded in California.
Boschella
Boschella is a genus of checkered beetles in the family Cleridae, established by Barr in 1980. The genus contains a single described species, Boschella fasciata. Checkered beetles in this family are generally predatory or scavenging, though specific ecological details for this genus remain limited.
Brucita marmorata
Marbled Palm Forest Leaf Beetle
Brucita marmorata is the sole described species in the genus Brucita, a group of skeletonizing leaf beetles in the family Chrysomelidae. The species is known from Texas in the United States and Guatemala in Central America. The common name "Marbled Palm Forest Leaf Beetle" suggests association with palm forest habitats, though specific ecological details remain poorly documented.
Bryantopsis
Bryantopsis is a genus of treehoppers (family Membracidae) in the subfamily Smiliinae. It contains a single described species, Bryantopsis ensigera, with two subspecies: B. e. ensigera and B. e. humerosa. The genus was established by Ball in 1937 and is restricted to the southwestern United States and northern Mexico.
Cacoecimorpha
carnation tortrix moths
Cacoecimorpha is a monotypic moth genus in the family Tortricidae, established by Obraztsov in 1954. The genus contains a single species, Cacoecimorpha pronubana, commonly known as the carnation tortrix. This species is a highly polyphagous pest of horticultural and agricultural significance, native to the Mediterranean region but now widespread across Europe, North Africa, and introduced to North America. The genus is classified within the tribe Archipini of the subfamily Tortricinae.
Caerosternus
Caerosternus is a small genus of clown beetles in the family Histeridae, established by J.L. LeConte in 1852. The genus contains a single described species, Caerosternus americanus. As a member of Histeridae, it belongs to the group of beetles commonly known as clown beetles or hister beetles.
Calasesia
Calasesia is a genus of clearwing moths in the family Sesiidae, established by Beutenmüller in 1899. The genus contains a single described species, Calasesia coccinea, described in 1898. As a member of the tribe Osminiini, it belongs to a group of moths known for wasp-mimicking appearances and diurnal activity patterns. The genus remains poorly documented with limited biological information available.
Calledapteryx
scoopwing moths
Calledapteryx is a monotypic genus of scoopwing moths in the family Uraniidae, containing only the species Calledapteryx dryopterata. The genus was established by Augustus Radcliffe Grote in 1868. Some taxonomic authorities treat Calledapteryx as a synonym of Epiplema.
Camelopsocus hiemalis
Camelopsocus hiemalis is a small, winter-active barklouse (order Psocodea, family Psocidae) described by Mockford in 1984. It belongs to a monobasic genus, meaning it is the sole species in Camelopsocus. The species is endemic to a restricted area of the Front Ranges in Colorado, USA, where it has been observed active during warm winter days. Its specific epithet 'hiemalis' (Latin for 'of winter') reflects this unusual seasonal activity pattern.
Camnula
clearwinged grasshopper
Camnula is a genus of band-winged grasshoppers in the family Acrididae, established by Stål in 1873. The genus contains a single species, Camnula pellucida (Scudder, 1862), commonly known as the clearwinged grasshopper. This species is a significant agricultural and rangeland pest across much of North America. The genus is classified within the subfamily Oedipodinae and tribe Hippiscini.
Campyloneura virgula
Campyloneura virgula is the sole species in the monotypic genus Campyloneura, a plant bug in the family Miridae. It is a true bug (Hemiptera) characterized by piercing-sucking mouthparts. The species has been documented across the Azores archipelago, with distribution records from Corvo, Faial, Flores, Graciosa, and Pico islands.
Canalidion montanum
Canalidion montanum is a small tangle-web spider (family Theridiidae) and the sole species in the monotypic genus Canalidion. Originally described as Theridion montanum by James Emerton in 1882, it was transferred to its own genus by J. Wunderlich in 2018 based on distinctive cheliceral dentition and male genitalic morphology. The species has a holarctic distribution, occurring across northern North America and Eurasia.
Cargida
Cargida is a monotypic moth genus in the family Notodontidae, established by William Schaus in 1901. It contains a single species, Cargida pyrrha, described by Herbert Druce in 1898. The genus is endemic to Mexico.
Carptima hydriomenata
Carptima hydriomenata is a rare moth and the sole member of its genus. It was first described by Pearsall in 1906 and is known only from Arizona. The species belongs to the family Geometridae, a large group of moths commonly called inchworms or geometer moths due to their larvae's characteristic looping gait. Its restricted range and limited number of observations make it one of the more poorly documented geometrid moths in North America.
Cathetopteron amoena
Cathetopteron amoena is a species of longhorn beetle (family Cerambycidae) described by Hamilton in 1896. It is the sole member of its genus, placing it among the many monotypic genera within the diverse subfamily Lamiinae. The species belongs to the tribe Hemilophini, a group characterized by often striking coloration and patterns. Very few observations of this species exist in public databases, suggesting it is either genuinely rare, undercollected, or restricted in distribution.
Ceratempis
Ceratempis is a genus of dance flies (Diptera: Brachystomatidae) established by Melander in 1928. The genus contains a single described species, Ceratempis longicornis. Members of this genus belong to the subfamily Trichopezinae, a group characterized by distinctive wing venation and predatory habits. The genus remains poorly known, with limited published information on its biology and ecology.
Ceratinopsidis formosa
Ceratinopsidis formosa is a species of dwarf spider in the family Linyphiidae. It is the sole member of its genus, which was established by Bishop and Crosby in 1930. The species was originally described by Banks in 1892. Very little is known about its biology or ecology.
Ceratobarys
Ceratobarys is a monotypic genus of frit flies in the family Chloropidae, established by Coquillett in 1898. The genus contains a single described species, Ceratobarys eulophus. Chloropidae are commonly known as grass flies or frit flies, though specific ecological details for this genus remain poorly documented.
Ceratodalia gueneata
Guenée's Carpet Moth
Ceratodalia gueneata is a moth species in the family Geometridae and the sole member of its genus. It is found in western North America, from British Columbia and Alberta south to Colorado and California. The species is commonly known as Guenée's Carpet Moth.
Cercocarpopsallus
Cercocarpopsallus is a genus of plant bugs in the family Miridae, described by Schuh in 2006. The genus name references Cercocarpus, a genus of mountain mahogany plants (Rosaceae), suggesting a potential host association. As a recently described and poorly documented genus, it is known from very few records.
Chelifer
Chelifer is a genus of pseudoscorpions in the family Cheliferidae, established in 1762. The genus is currently monotypic, containing only Chelifer cancroides, the house pseudoscorpion, which is the most widely distributed pseudoscorpion species globally. All other species originally described in Chelifer have been moved to other genera, synonymized, or designated as nomina dubia or nomina nuda. The genus is characterized by distinctive morphological features including large setose tubercles on the carapace and specialized male genitalia structures.
Cherokia georgiana
Georgia Flat-backed Millipede, Wrinkled Flat-backed Millipede
Cherokia georgiana is a monospecific millipede genus in the family Xystodesmidae, representing the sole species in genus Cherokia. Molecular phylogenetic analysis of seven gene loci supports recognition of a single highly variable species, with three formerly recognized subspecies (C. g. ducilla, C. g. latassa) now synonymized. The species exhibits extensive morphological variation in coloration, body size, and paranota shape that correlates with geography and elevation rather than phylogenetic relationships. It is sister to the genus Pleuroloma.
Chicobolus
Chicobolus is a monotypic genus of millipedes in the family Spirobolidae, established by Chamberlin in 1947. The genus contains a single species, Chicobolus spinigerus, commonly known as the Florida ivory millipede. This species is notable for its large size and pale coloration, and has been documented as a natural intermediate host for the acanthocephalan parasite Macracanthorhynchus ingens.
Chloroplus cactocaetes
Texas Cholla Grasshopper
Chloroplus cactocaetes is a spur-throated grasshopper and the sole species in the genus Chloroplus. It is endemic to Texas and closely associated with cholla cacti (Cylindropuntia species). The species was described by Hebard in 1918 and remains poorly known despite its distinctive habitat specialization.
Chrismania pictipennalis
Chrismania pictipennalis is a species of moth in the family Crambidae, subfamily Odontiinae. It is the sole member of the genus Chrismania. The species has been recorded from arid regions of the southwestern United States, specifically southern California and Arizona. It was first described by Barnes and McDunnough in 1914.
Chrotoma dunniana
Chrotoma dunniana is a monotypic species of long-horned beetle in the family Cerambycidae. It is the sole member of the genus Chrotoma, which belongs to the tribe Bothriospilini within the subfamily Cerambycinae. The species occurs in the southwestern United States and northern Mexico. Information on its biology and ecology remains limited due to its rarity and restricted distribution.
Clioperla clio
Clio Stripetail
Clioperla clio is a species of green-winged stonefly and the sole member of the monotypic genus Clioperla. It belongs to the family Perlodidae, a group of predatory stoneflies commonly known as stripetails. The species is endemic to the Nearctic region and has been documented across the eastern and southeastern United States. Like other perlodids, it is associated with freshwater habitats during its immature stages.
Clostoeca
Clostoeca is a genus of northern caddisflies in the family Limnephilidae, established by Banks in 1943. The genus is monotypic, containing only one described species: Clostoeca disjuncta. As a member of the Limnephilidae family, it belongs to a group of caddisflies commonly known as northern caddisflies, which are predominantly found in cool, temperate regions.
Clytoleptus
Clytoleptus is a monotypic genus of longhorn beetles (family Cerambycidae) established by Casey in 1912. The genus contains a single species, Clytoleptus albofasciatus. Members of this genus are recognized as ant mimics within the diverse North American cerambycid fauna, a trait shared with several related genera in the tribe Clytini.
Clytoleptus albofasciatus
Grape Trunk Borer
Clytoleptus albofasciatus is a longhorned beetle (family Cerambycidae) and the sole species in the genus Clytoleptus. It is commonly known as the Grape Trunk Borer. The species has been documented in North America, with records from Ontario, Québec, and other Canadian provinces, as well as the United States. It has been captured in baited jug traps using ethanol and wine mixtures, suggesting attraction to fermenting volatiles.
Coccivora
minute pirate bugs
Coccivora is a genus of minute pirate bugs (family Anthocoridae) containing a single described species, C. californica. These small predatory true bugs belong to the diverse Anthocoridae family, whose members are generally recognized as beneficial predators in agricultural and natural ecosystems. The genus was established by McAtee & Malloch in 1925. As a member of Anthocoridae, Coccivora likely shares the family's general characteristics of small size and predatory habits, though species-specific biology remains poorly documented.
Coenopoeus palmeri
Coenopoeus palmeri is a cactus-associated longhorn beetle (Cerambycidae: Lamiinae) and the sole member of its genus. Described by LeConte in 1873, it is specialized on staghorn cacti (Cylindropuntia spp.), with larvae mining internally within cactus stems and adults feeding externally at night. The species is found in the southwestern United States and northern Mexico, with adults active primarily in spring and summer.
Connatichela artemisiae
Connatichela artemisiae is a monotypic weevil species endemic to the Yukon Territory, Canada, and the sole member of its genus. The species was described in 1984 and represents a distinctive lineage within the subfamily Entiminae, characterized by unique tarsal claw morphology. Fossil evidence indicates a broader Pleistocene distribution across Beringia, with modern restriction to the Yukon likely reflecting post-glacial habitat loss. Adults have been documented in association with small Artemisia species.
Cratacanthus dubius
Dubious Harp Ground Beetle
Cratacanthus dubius is a species of ground beetle in the family Carabidae, and the sole member of the genus Cratacanthus. It is a moderately-sized beetle with a distinctive harp-like pronotal shape that gives the genus its name. The species has a broad distribution across North America, with records from both Canada and the United States. Its common name reflects both its taxonomic placement in the harp ground beetle lineage and the uncertainty that surrounded its early classification.
Cribrus
Cribrus is a leafhopper genus in the tribe Paralimnini (Hemiptera: Cicadellidae: Deltocephalinae) established by Oman in 1949. It contains a single recognized species, Cribrus concinnus (Sanders & DeLong, 1917). The genus was reviewed in 2024 due to historical confusion with the newly described Boreolimnus, resulting in recognition of two junior synonyms: Deltocephalus plagus and Laevicephalus shingwauki. Molecular phylogenetic analysis placed C. concinnus as sister to part of Sorhoanus with weak support, distinct from Boreolimnus.
Cucochodaeus
Cucochodaeus is a genus of scarab beetles in the family Ochodaeidae, described by Paulsen in 2007. The genus contains one described species, C. sparsus. Members of this genus are associated with sandy habitats. The family Ochodaeidae is commonly known as sand-loving scarab beetles.
Cuniberta subtinctella
Cuniberta subtinctella is a species of snout moth in the family Pyralidae, subfamily Phycitinae. It is the sole species in the genus Cuniberta, which was established by Heinrich in 1956. The species was first described by Ragonot in 1887 and is known from western North America.
Cupes capitatus
Prominent-headed Reticulated Beetle
Cupes capitatus is the sole extant species in the genus Cupes, a relict lineage within the family Cupedidae. Described by Fabricius in 1801, this beetle represents one of the few living members of an ancient group of beetles with distinctive reticulated wing covers. Its restricted distribution in eastern North America and its phylogenetic isolation make it of particular interest for studies of beetle evolution and biogeography.
Curalium
Curalium is a genus of true bugs (Hemiptera: Heteroptera) established in 2008 as the sole member of the family Curaliidae. The genus contains a single described species, Curalium cronini, known only from male specimens collected in the southeastern United States. Its distinctive physical and genetic characteristics warranted placement in a new family, representing a rare example of a higher-level taxonomic discovery in the 21st century.
Cyphopelta
Cyphopelta is a genus of plant bugs in the family Miridae, established by Van Duzee in 1910. The genus contains a single described species, Cyphopelta modesta. As a member of the Miridae, it belongs to the diverse group of true bugs characterized by piercing-sucking mouthparts.
Cyrtophorus
Cyrtophorus is a monotypic genus of longhorned beetles in the family Cerambycidae, containing only the species Cyrtophorus verrucosus. The genus is notable for its remarkable ant-mimicry, with adults bearing a strong resemblance to carpenter ants (Camponotus species). Adults are small, averaging approximately 9 mm in length, and are active primarily in early spring. The single species has a broad distribution across eastern North America.
Darlingtonea
Darlingtonea is a monotypic genus of cave-dwelling ground beetles (Carabidae) containing a single species, D. kentuckensis. This trechine beetle is endemic to eastern Kentucky's karst cave systems, where it functions as a top terrestrial predator specialized for high-humidity subterranean environments. The genus exhibits extreme physiological specialization, with narrow humidity tolerance identified as a critical vulnerability to climate change.
Dasylechia
Dasylechia is a monotypic genus of robber flies (family Asilidae) established by Williston in 1907. The genus contains a single described species, Dasylechia atrox. This robber fly was historically considered ultra-rare, but its known range has expanded significantly through citizen science photography. Observations documented on iNaturalist have become the primary source of distributional data for this species, now outnumbering museum specimens.
Deidamia inscriptum
Lettered Sphinx
Deidamia inscriptum, commonly known as the Lettered Sphinx, is a moth species in the family Sphingidae. It is the sole member of its genus. The species was first described by Thaddeus William Harris in 1839, with the genus erected by James Brackenridge Clemens in 1859. It is distributed across eastern North America.
Dercylinus impressus
Dercylinus impressus is a rarely encountered ground beetle (family Carabidae) and the sole species in the genus Dercylinus. Described by LeConte in 1853, this species is endemic to the United States with records from North America. The genus belongs to the subfamily Licininae and tribe Oodini. Very little is known about its biology, ecology, or habitat preferences due to its apparent rarity and limited collection records.
Diaeretiella
Diaeretiella is a monotypic genus of parasitoid wasps in the family Braconidae, subfamily Aphidiinae. The sole species, Diaeretiella rapae, is a cosmopolitan koinobiont endoparasitoid of aphids with documented occurrence in 87 countries. It has been recorded parasitizing approximately 98 aphid species across more than 180 plant species in 43 plant families, with particular association to cabbage aphid (Brevicoryne brassicae) on cruciferous crops. The genus is recognized as an important biological control agent in integrated pest management systems.
Dibusa
microcaddisfly
Dibusa is a genus of microcaddisflies in the family Hydroptilidae, established by Ross in 1939. The genus is monotypic, containing a single described species, Dibusa angata. This species exhibits a highly specialized ecological relationship, being obligately associated with the freshwater red alga Lemanea australis throughout its larval development. The genus represents a narrow example of host-specific adaptation within the diverse microcaddisfly fauna.
Didasys
Didasys is a monotypic genus of tiger moths in the family Erebidae, subfamily Arctiinae. The genus contains a single species, Didasys belae, commonly known as the double-tufted wasp moth. The genus was established by Augustus Radcliffe Grote in 1875. The common name refers to the species' wasp-like appearance, a form of protective mimicry.
Doliotettix
Doliotettix is a monotypic genus of leafhoppers in the family Cicadellidae, established by Ribaut in 1942. The genus contains a single species, Doliotettix lunulata, known from northern Europe. It is classified within the subfamily Deltocephalinae and tribe Athysanini. The genus has been documented in Norway and Sweden based on distribution records.
Dryobius
Dryobius is a monospecific genus of longhorn beetles (family Cerambycidae) containing only Dryobius sexnotatus. The genus name derives from Greek roots meaning "tree-dwelling." The sole species is distributed across the eastern United States, with highest concentration in the Ohio River Valley. Larvae develop in hardwood trees including maple, beech, basswood, and elm.
Dylobolus
Dylobolus is a monotypic genus of longhorn beetles (Cerambycidae) containing the single species Dylobolus rotundicollis. The genus was established by James Thomson in 1868. It belongs to the tribe Hemilophini within the subfamily Lamiinae.
Elliponeura
Elliponeura is a genus of small flies in the family Chloropidae, commonly known as grass flies. The genus was established by Loew in 1869. Only one species, E. debilis, has been formally described. Members of this genus are poorly studied, with limited biological and ecological data available.
Emarginea dulcinea
Emarginea dulcinea is a moth species in the family Noctuidae, described by Harrison Gray Dyar Jr. in 1921. It is recorded from North America and assigned MONA/Hodges number 9719. The genus Emarginea is monotypic, containing only this species.
Emertongone montifer
Lineweaving Spider
Emertongone montifer is a dwarf spider and the sole species in the monotypic genus Emertongone. Originally described as Lophocarenum montiferum in 1882, it was later transferred to Oedothorax before being placed in its current genus in 2022 based on phylogenetic work by Lin, Lopardo & Uhl. It is a member of the sheet-web weaving family Linyphiidae and is known only from the United States.
Endrosis
white-shouldered house moth
Endrosis is a monotypic genus of concealer moths in the family Oecophoridae, subfamily Oecophorinae. The sole included species, Endrosis sarcitrella, is commonly known as the white-shouldered house moth. The genus was established by Hübner in 1825. Several additional species were historically described as members of this genus, but these have since been reclassified, leaving E. sarcitrella as the only confirmed species.
Epantius
Epantius is a genus of darkling beetles in the family Tenebrionidae, established by LeConte in 1851. The genus contains a single described species, Epantius obscurus. Members of this genus are part of the diverse darkling beetle fauna of North America.
Erepsocassis
Erepsocassis is a genus of tortoise beetles established by Spaeth in 1936. It belongs to the family Chrysomelidae, subfamily Cassidinae, and tribe Cassidini. The genus contains a single described species, E. rubella. Members of this group are characterized by their domed, tortoise-like body form typical of the subfamily Cassidinae.
Esperanza texana
Esperanza texana is a broad-headed bug and the sole described species in the genus Esperanza. It belongs to the family Alydidae, a group of true bugs characterized by their expanded, triangular heads. The species has been documented in Texas and surrounding regions, with confirmed host plant associations on Senna species (Leguminosae). Fifth-instar nymphs have been described morphologically, indicating nymphal development occurs directly on host plants.
Esselenia vanduzeei
Vanduzee's Grasshopper
Esselenia vanduzeei is a species of slant-faced grasshopper in the family Acrididae, subfamily Gomphocerinae. It is the sole described species in the genus Esselenia, which is endemic to California. The species was described by Morgan Hebard in 1920 and is named in honor of the entomologist Edward P. Van Duzee. As a member of the Gomphocerinae, it possesses the characteristic slanted face profile typical of this subfamily.
Eubarnesia ritaria
Ocotillo Moth
Eubarnesia ritaria, commonly known as the Ocotillo Moth, is a species of geometrid moth endemic to the American Southwest. It is the sole member of the monotypic genus Eubarnesia. The species was first described by Grossbeck in 1910 and later placed in its current genus by Cockerell in 1917. It is associated with desert habitats where its larval host plant, ocotillo (Fouquieria splendens), occurs.
Euchaetogyne
Euchaetogyne is a genus of tachinid flies established by Townsend in 1908. The genus contains a single described species, Euchaetogyne roederi, originally described by Williston in 1893. These flies are parasitoids, a characteristic feature of the family Tachinidae. The genus is distributed in North America, with records from the United States and Mexico.
Eucrossus
Eucrossus is a monotypic genus of longhorn beetles (Cerambycidae) containing the single species Eucrossus villicornis. The genus was established by LeConte in 1873 and is classified within the subfamily Cerambycinae and tribe Hesperophanini. The sole species represents a rare example of a genus-level taxon with no known congeners.
Eudesma
Eudesma is a genus of cylindrical bark beetles in the family Zopheridae, established by LeConte in 1863. The genus contains a single described species, Eudesma undulata. These beetles belong to a group of primarily wood-associated beetles characterized by their compact, cylindrical body form.
Eulogia ochrifrontella
Broad-banded Eulogia Moth
Eulogia ochrifrontella is a small snout moth and the sole member of its genus. It is commonly known as the broad-banded eulogia moth. The species occurs across much of North America and has been documented from Canada through the eastern and central United States. It is associated with hardwood trees including pecan, oak, and apple.
Eumacrodes yponomeutaria
Eumacrodes yponomeutaria is the sole species in the monotypic genus Eumacrodes, a geometrid moth first described by Achille Guenée in 1858. The species occurs in the Caribbean and North America. As a member of the subfamily Sterrhinae, it belongs to a diverse group of moths commonly known as carpet moths or wave moths. The genus was established by Warren in 1905.
Eumichthus oedipus
Eumichthus oedipus is a longhorn beetle (Cerambycidae) and the sole species in its genus. It was described by John Lawrence LeConte in 1873. The species belongs to the tribe Eumichthini, a small group within the subfamily Cerambycinae. It is known from western North America, with records from British Columbia, Canada, and the western United States.
Eupackardia
Eupackardia is a monotypic moth genus in the family Saturniidae, containing a single species, Eupackardia calleta (the calleta silkmoth). The genus was erected by Theodore Dru Alison Cockerell in 1912. The sole species is notable for its striking black-and-white wing pattern with red thoracic markings, and its caterpillars possess bright aposematic coloration with chemical defenses.
Eupackardia calleta
Calleta Silkmoth, Ocotillo Silkmoth
Eupackardia calleta, the Calleta silkmoth, is a distinctive Saturniidae species and the sole member of its genus. Found in the southwestern United States and Mexico, this moth is strongly associated with ocotillo (Fouquieria splendens), which serves as its primary larval host. Adults are nocturnal and attracted to light. The species is notable for its striking appearance and restricted distribution tied to desert and semi-arid habitats.
Euparthenos
locust underwing
Euparthenos is a monotypic moth genus in the family Erebidae containing a single species, Euparthenos nubilis (locust underwing). The genus was erected by Augustus Radcliffe Grote in 1876. Adults are medium-sized nocturnal moths with distinctive yellow-orange hindwings marked by four concentric black bands. The genus is endemic to North America and closely related to the underwing moths of genus Catocala.
Eupristocerus
Eupristocerus is a monotypic genus of jewel beetles (family Buprestidae) containing the single species Eupristocerus cogitans. The genus is classified within the tribe Coraebini, a group of buprestids characterized by their association with woody host plants. Eupristocerus cogitans is notable as the only coraebine buprestid known from North America north of Mexico.
Euptychodera
Euptychodera is a monotypic genus of shield-backed bugs in the family Scutelleridae, established by Bergroth in 1908. The genus contains a single described species, E. corrugata. Members of Scutelleridae are characterized by an enlarged scutellum that covers most of the abdomen and wings, giving them a distinctive shield-like appearance.
Eurhinosea flavaria
A small geometrid moth found in western North America. The genus Eurhinosea is monotypic, containing only this species. Both the genus and species were described by Packard in 1873. The species name flavaria suggests yellow coloration.
Euryderus grossus
Euryderus grossus is a ground beetle species in the family Carabidae, and the sole member of the genus Euryderus. It occurs in North America, with records from Canada and the United States. As a member of the tribe Harpalini, it belongs to a diverse group of carabid beetles often associated with open habitats. The species was described by Thomas Say in 1830.
Euryscelis suturalis
Euryscelis suturalis is a longhorn beetle (Cerambycidae) and the sole species in its genus. It was originally described by Olivier in 1795 under the name Callidium suturale. The species occurs in the Caribbean and North America. Despite its distinctive taxonomic placement as the only member of Euryscelis, published ecological and behavioral information remains sparse.
Eusomalia
pill beetles
Eusomalia is a genus of pill beetles in the family Byrrhidae. The genus was described by Casey in 1912 and contains a single described species, Eusomalia lecontei. Members of this genus share the characteristic defensive behavior of pill beetles, which curl into a ball when disturbed.
Eustixia
spotted peppergrass moths
Eustixia is a monotypic moth genus in the family Crambidae, containing a single species, Eustixia pupula (spotted peppergrass moth). The genus was established by Jacob Hübner in 1823. Its sole representative is a small moth found in eastern North America, associated with plants in the mustard family.
Eustixia pupula
Spotted Peppergrass Moth
Eustixia pupula, the Spotted Peppergrass Moth, is a small crambid moth and the sole species in its genus. It occurs across eastern North America from Massachusetts to Florida and west to Texas, with records extending north to Ontario. The species is attracted to artificial light and has been documented in residential yards and urban settings.
Euthochtha
helmeted squash bug
Euthochtha is a monotypic genus of leaf-footed bugs in the family Coreidae, containing the single described species E. galeator. The genus is characterized by distinctive morphological features that have earned it the common name "helmeted squash bug." It belongs to the tribe Acanthocerini within the subfamily Coreinae. The genus has been recorded from the Caribbean region and parts of the eastern United States.
Euthyrhynchus
Florida predatory stink bug
Euthyrhynchus is a monotypic genus of predatory stink bugs in the family Pentatomidae, subfamily Asopinae. The sole species, E. floridanus (Florida predatory stink bug), is native to the southeastern United States and has expanded its range northward in recent decades, now regularly occurring as far north as the Mid-Atlantic and New England. This carnivorous shield bug is considered beneficial in agricultural and garden settings due to its predation on pest insects.
Eviridemas minuta
Eviridemas minuta is a small moth species and the sole member of its genus, which was erected by William Barnes and Foster Hendrickson Benjamin in 1929. Originally described by Barnes and James Halliday McDunnough in 1910, this species belongs to the family Noctuidae, commonly known as owlet moths. The genus is monotypic, meaning it contains only this single species.
Evita hyalinaria
Evita hyalinaria is the sole species in the monotypic genus Evita, described by Grossbeck in 1908. It is a geometrid moth found in southwestern North America. The genus was established by Hahn William Capps in 1943. Very few observations exist, with only one documented occurrence in iNaturalist.
Evolenes
Evolenes is a monotypic genus of ground beetles in the family Carabidae, containing the single species Evolenes exarata. The genus was established by LeConte in 1853 and is classified within the subtribe Oodina of the tribe Oodini. The sole species is known from the United States.
Exiliscelis
Exiliscelis is a genus of flies in the family Canthyloscelidae, established by Hutson in 1977. It contains a single described species, Exiliscelis californiensis. Members of this family are small, obscure flies often associated with moist or wetland habitats. The genus is part of the subfamily Synneurinae, a group of primitive nematoceran flies with limited ecological documentation.
Feniseca
North American Harvesters, Harvester
Feniseca is a monotypic genus of butterflies in the family Lycaenidae, containing a single species, Feniseca tarquinius (the harvester). This genus is notable for representing the only obligate carnivorous butterfly in North America. The larvae feed exclusively on aphids rather than plant material, a highly unusual trait among butterflies. Adults are found in wooded habitats near streams, particularly in association with alders.
Feniseca tarquinius
Harvester
Feniseca tarquinius, commonly known as the harvester, is a small and uncommon butterfly native to North America. It is the sole member of the monotypic genus Feniseca, making it taxonomically unique within the family Lycaenidae. The species is notable for its carnivorous larvae, which feed on aphids rather than plant material—a highly unusual trait among butterflies. Adults are typically associated with wooded habitats and forest edges.
Flohria
Flohria is a monotypic genus of rove beetles (Staphylinidae) containing a single species, Flohria subcoerulea. The genus was erected by David Sharp in 1884 and named in honor of collector Julius Flohr. Phylogenetic studies suggest it may occupy a basal position within the subtribe Philonthina, potentially representing a relict lineage.
Floridocassis
Floridocassis is a genus of tortoise beetles (family Chrysomelidae) containing a single described species, F. repudiata. The genus was established by Spaeth in 1952. Tortoise beetles in this subfamily (Cassidinae) are characterized by a shield-like body form and the ability to clamp their elytra tightly against the substrate. The genus name suggests a Florida association, though specific distribution details for the genus remain limited in published sources.
Florinda
Scarlet Sheetweb Weaver, Black-tailed Red Sheetweaver, Red Grass Spider
Florinda is a monotypic genus of dwarf spiders in the family Linyphiidae, containing only Florinda coccinea. This small spider is notable for its bright scarlet coloration with distinctive black markings, including a diagnostic black tubercle on the rear of the abdomen. The genus was established by Octavius Pickard-Cambridge in 1896.
Fossocarus
Fossocarus is a monotypic genus of scarab beetles in the family Scarabaeidae, subfamily Melolonthinae. The genus contains a single described species, F. creoleorum. It belongs to the tribe Melolonthini, commonly known as May beetles or Junebugs. The genus was established by Howden in 1961.
Franclemontia
Franclemontia is a genus of moths in the family Noctuidae, established by Ferguson in 1992. The genus contains a single described species, Franclemontia interrogans (Walker, 1856). It belongs to the subfamily Noctuinae, one of the largest lineages within the owlet moths. Very few observations of this genus exist in natural history databases.
Fumibotys fumalis
Mint Root Borer Moth
Fumibotys fumalis, the Mint Root Borer Moth, is the sole species in its genus. It belongs to the family Crambidae, a group of grass moths. The species is found across most of North America and is associated with mint plants. Its common name derives from the larval habit of boring into mint roots.
Fumontana
Fumontana is a monotypic genus of harvestman (Opiliones: Laniatores) containing the single species F. deprehendor. It is considered an ancient relict lineage with Gondwanan affinities, currently restricted to the southern Appalachian Mountains of the eastern United States. The genus name derives from Latin words for 'smoke' and 'mountain', referencing its discovery in the Great Smoky Mountains.
Fumontana deprehendor
Fumontana deprehendor is the sole species in the monotypic genus Fumontana, a harvestman (order Opiliones) endemic to the southern Appalachian Mountains. Originally described from only four specimens at two old-growth forest localities, expanded field surveys have documented 141 individuals across 22 newly-discovered populations throughout the Appalachian uplands. The species exhibits minimal geographic variation in both body and genital morphology across its disjunct range. Its conservation status has shifted from perceived hyper-rarity to recognition of broader distribution with geographically isolated population units requiring continued study.
Geropa
Geropa is a genus of longhorn beetles (Cerambycidae) established by Casey in 1912. The genus is monotypic, containing only Geropa concolor. It is classified in the subfamily Cerambycinae and tribe Achrysonini.
Gertschanapis shantzi
Gertschanapis shantzi is a minute araneomorph spider and the sole species in its genus. It belongs to the family Anapidae, a group of small spiders often associated with leaf litter and moss habitats. The species was first described from specimens collected in the United States and remains poorly known due to its cryptic size and habitat.
Glauce pectenalaeella
Glauce pectenalaeella is a small moth in the family Gelechiidae. It is the sole species in the genus Glauce. The species is found across eastern and central North America, with records from Canada (Quebec) and multiple U.S. states. The forewings are characterized by dense dark dusting that largely obscures the pale yellowish ground color.
Glaucodontia pyraustoides
Glaucodontia pyraustoides is a species of moth in the family Crambidae, and the sole member of its genus. It was described by Munroe in 1972. The species is known from a small number of records in the southwestern United States. Very little has been published about its biology or ecology.
Glaucotes
Glaucotes is a monotypic genus of longhorn beetles in the family Cerambycidae, subfamily Lamiinae, tribe Acanthocinini. The genus contains a single species, Glaucotes yuccivorus, described by Fall in 1907. The genus was established by Casey in 1913.
Glaucotes yuccivorus
Glaucotes yuccivorus is a species of longhorn beetle in the subfamily Lamiinae, and the sole member of the monotypic genus Glaucotes. Described by Fall in 1907, this beetle is found in the southwestern United States and Mexico. The species epithet 'yuccivorus' indicates an association with yucca plants, likely as a host. It belongs to the tribe Acanthocinini within the diverse family Cerambycidae.
Glycobius
sugar maple borer
Glycobius is a monotypic genus of longhorned beetles (family Cerambycidae) containing the single species Glycobius speciosus, commonly known as the sugar maple borer. The species is native to eastern North America and is a specialist wood-borer whose larvae feed on sugar maple (Acer saccharum). Adults are active in spring and early summer.
Glyphocystis viridivallis
Glyphocystis viridivallis is a species of snout moth in the family Pyralidae. It is the sole member of the monotypic genus Glyphocystis. The species was described by André Blanchard in 1973 and is known only from Texas. Very little is known about its biology or ecology.
Gnamptopelta obsidianator
bent-shielded besieger wasp
Gnamptopelta obsidianator is a large ichneumonid wasp and the sole species in its monotypic genus. It is distinguished by a concave clypeus, a trait reflected in its genus name derived from Greek words for 'bent' and 'shield.' The species is an ectoparasitoid of sphinx moth caterpillars (Macroglossinae) feeding on grapevines. Adults are active in spring across eastern North America.
Gnaphalodes
Gnaphalodes is a genus of longhorn beetles in the family Cerambycidae, established by Thomson in 1861. It is monotypic, containing only the species Gnaphalodes trachyderoides. The genus belongs to the tribe Bothriospilini within the subfamily Cerambycinae.
Gnaphalodes trachyderoides
A longhorn beetle and the sole species in its genus, characterized by a robust, somewhat flattened body and antennae that are notably shorter than those of many cerambycids. The species name 'trachyderoides' references its resemblance to the genus Trachyderes. It occurs from the southwestern United States through Mexico and Central America.
Gnathonargus unicorn
Unicorn spider
Gnathonargus unicorn is a small sheet-web weaving spider belonging to the family Linyphiidae. It is the sole species in its genus, which was established by Bishop & Crosby in 1935. The species was originally described by Banks in 1892 and is known from the United States. As with many linyphiid spiders, it is poorly studied and little is known of its natural history.
Gnathonaroides pedalis
Gnathonaroides pedalis is a dwarf spider and the sole species in the monotypic genus Gnathonaroides. First described by Emerton in 1923 and later placed in its current genus by Bishop & Crosby in 1938, this small linyphiid spider is known only from Canada and the United States. As a sheet-web weaver, it belongs to one of the most species-rich families of spiders.
Goniops chrysocoma
Golden-haired Horse Fly
Goniops chrysocoma is the sole species in the monotypic genus Goniops, a horse fly in the family Tabanidae. It is found in North America, with records from the United States including Vermont. The species is characterized by its distinctive golden-haired appearance, which contributes to its common name. As a member of the horse fly family, it belongs to a group of blood-feeding flies known for their painful bites and ecological significance as pollinators and prey for other animals.
Gosodesmus
pink feather boa millipede
Gosodesmus is a monotypic genus of platydesmidan millipedes described by Ralph V. Chamberlin in 1922. The sole species, Gosodesmus claremontus, is endemic to California and notable for its bright pink to coral coloration. The species has been the subject of chemical research following the 2020 discovery of a novel alkaloid, gosodesmine, in its defensive secretions.
Gracilia
Gracilia is a genus of longhorn beetles (family Cerambycidae) containing a single species, Gracilia minuta. The genus is native to Europe but has been introduced to North and South America, including the United States, Argentina, and Uruguay. It belongs to the diverse group of wood-boring beetles commonly known as longhorn beetles.
Gracilia minuta
basket longhorn beetle
Gracilia minuta is a small longhorn beetle (Cerambycidae) native to Europe, with established introduced populations in the United States, Argentina, and Uruguay. It is the sole species in the genus Gracilia. The species has been documented on islands in the Azores (Faial, São Miguel, Santa Maria, and Terceira), suggesting dispersal capabilities or human-mediated transport to oceanic islands.
Grais stigmaticus
Hermit Skipper
Grais stigmaticus, commonly known as the hermit skipper, is the sole species in the monotypic genus Grais. This skipper butterfly has a broad distribution spanning from the southwestern United States through Central America to Argentina, with populations also present in Jamaica. The species was first described by Mabille in 1883 under the basionym Anastrus stigmaticus. As a member of the family Hesperiidae, it exhibits the characteristic rapid, darting flight pattern typical of skippers.
Grypotes puncticollis
Grypotes puncticollis is a deltocephaline leafhopper and the sole species in the monotypic genus Grypotes. It is a Palaearctic species whose eastern distributional margin is defined by records from Kazakhstan. The species belongs to the tribe Athysanini within the subfamily Deltocephalinae.
Guentherocoris
Guentherocoris is a genus of plant bugs (family Miridae) established by Schuh & Schwartz in 2004. The genus contains a single described species, G. atritibialis. As a member of the mirid family, it belongs to the diverse group of true bugs known for their plant-associated habits.
Hadenella pergentilis
Hadenella pergentilis is a noctuid moth and the sole species in its genus. It occurs in western North America from the Pacific Northwest and Canadian prairies south through the Rocky Mountains to Colorado and Utah, with coastal populations in southern California. The species is associated with sage steppe habitats. It was described by Augustus Radcliffe Grote in 1883.
Hadromychus
handsome fungus beetles
Hadromychus is a genus of handsome fungus beetles in the family Endomychidae, established by Bousquet & Leschen in 2002. The genus is monotypic, containing only one described species, Hadromychus chandleri. As members of Endomychidae, these beetles are associated with fungal substrates. The genus is poorly known due to its rarity and limited collection records.
Hagenius
dragonhunter
Hagenius is a monotypic genus of clubtail dragonflies (family Gomphidae) containing the single species Hagenius brevistylus, commonly known as the dragonhunter. This large, aggressive dragonfly inhabits riverine systems of eastern North America and is notable for its exceptional predatory behavior, including the habit of capturing and consuming other dragonflies and damselflies. The genus name honors Hermann August Hagen, a prominent 19th-century entomologist specializing in Odonata.
Haideoporus
Haideoporus is a monotypic genus of diving beetles in the family Dytiscidae, subfamily Hydroporinae. The genus contains a single species, Haideoporus texanus, described by Young & Longley in 1976. The species is a North American endemic stygobiont, meaning it is restricted to subterranean aquatic habitats. Larval morphology has been described, showing adaptations to hypogaeic (subterranean) life.
Harpalobrachys leiroides
Harpalobrachys leiroides is a ground beetle species and the sole member of its genus. It is classified within the subfamily Harpalinae, tribe Harpalini. The species has a Holarctic distribution spanning northern Eurasia and North America. It was first described by Motschulsky in 1844.
Hayhurstia
Hayhurstia is a monotypic genus of aphids in the family Aphididae, containing the single species H. atriplicis. The genus is notable for its role in biological control research, as populations serve as reservoirs for parasitoids that have been used in pest management programs. It is associated with Chenopodium (goosefoot) plants in agricultural and urban environments.
Heliocis
false blister beetles
Heliocis is a monotypic genus of false blister beetles (family Oedemeridae) containing a single described species, Heliocis repanda. The genus was established by Arnett in 1951. Members of this genus share the general characteristics of Oedemeridae, including soft, flexible elytra and a tendency toward elongate body forms. The limited species diversity suggests either restricted geographic range or specialized ecological requirements.
Hemigrotella argenteostriata
Hemigrotella argenteostriata is a noctuid moth and the sole member of its genus. It was described by Barnes and McDunnough in 1918. The species is endemic to southern California. Very few observations exist, with only 10 records documented on iNaturalist.
Heminocloa mirabilis
Heminocloa mirabilis is a moth species and the sole member of its monotypic genus within the family Noctuidae. Originally described as Basilodes mirabilis by Berthold Neumoegen in 1884, it was later placed in the genus Heminocloa erected by William Barnes and Foster Hendrickson Benjamin in 1924. The species is known only from the US state of Arizona, with 69 observations recorded on iNaturalist.
Hemioslaria pima
Hemioslaria pima is a moth species in the family Noctuidae, representing the sole member of its monotypic genus. The species was first described by William Barnes and Foster Hendrickson Benjamin in 1924. It is known only from the US state of Arizona, with 47 documented observations on iNaturalist. The genus and species are classified within the subfamily Acontiinae and tribe Chamaecleini.
Heteropacha rileyana
Riley's Lappet Moth
Heteropacha rileyana is a lappet moth in the family Lasiocampidae, the sole species in its genus. It was historically misidentified as a clearwing moth (Sesiidae) due to superficial resemblance. The species exhibits wasp-mimicking coloration with distinctive abdominal banding. Larvae feed on horse nettle (Solanum carolinense), a plant associated with sandy soils.
Hippiscus
wrinkled grasshopper
Hippiscus is a genus of band-winged grasshoppers in the family Acrididae, containing a single described species, Hippiscus ocelote. The genus is classified within the subfamily Oedipodinae and tribe Hippiscini. Commonly known as the wrinkled grasshopper, the sole species has been documented in dry woodland and glade habitats in North America.
Hodebertia
Hodebertia is a monotypic genus of crambid moths erected by Leraut in 2003. Its sole species, Hodebertia testalis, is a tropical micro-moth with occasional vagrant records in Europe. The genus is notable for its distinctive wing pattern and larval association with milkweed relatives and hibiscus.
Hodebertia testalis
Incolorous Pearl
Hodebertia testalis, known as the Incolorous Pearl, is a small crambid moth found primarily in tropical regions with occasional vagrant records reaching parts of Europe. It is the sole species in its genus, making Hodebertia monotypic. The species was first described by Fabricius in 1794 and has undergone taxonomic reclassification, with some sources placing it in the genus Pyrausta.
Hofmannophila
brown house moth (for sole species H. pseudospretella)
Hofmannophila is a monotypic genus of concealer moths (family Oecophoridae) containing a single species, H. pseudospretella, commonly known as the brown house moth. The genus appears closely related to Borkhausenia. The sole species is a significant synanthropic pest with nearly worldwide distribution, particularly abundant in Britain.
Homocerynea cleoriformis
Homocerynea cleoriformis is the sole species in the monotypic moth genus Homocerynea. The species was described by William Barnes and James Halliday McDunnough in 1913 from material collected in Arizona. It belongs to the family Erebidae (formerly classified in Noctuidae). No observations have been recorded in iNaturalist, indicating extreme rarity or possible extinction.
Homolagoa grotelliformis
Homolagoa grotelliformis is a noctuid moth and the sole member of its monotypic genus. The species was described in 1912 by William Barnes and James Halliday McDunnough, who noted its resemblance to moths in the genus Grotella (hence the specific epithet "grotelliformis"). It is found in North America, though specific details about its biology remain poorly documented.
Hoplomachidea
Hoplomachidea is a genus of plant bugs in the family Miridae, established by Reuter in 1909. The genus contains a single described species, H. consors. Members of this genus are classified within the suborder Heteroptera (true bugs) and the infraorder Cimicomorpha. As a mirid genus, it belongs to one of the largest families of true bugs, though specific biological details remain poorly documented.
Hubbellia marginifera
Arboreal Pine Katydid
Hubbellia marginifera, the sole species in the monotypic genus Hubbellia, is a shield-backed katydid endemic to the southeastern United States. It is strongly associated with pine forests and has been documented in arboreal habitats, reflecting its common name. The species was first described by Francis Walker in 1869 from specimens collected in the region.
Hylurgopinus
native elm bark beetles
Hylurgopinus is a monotypic genus of bark beetles in the tribe Hylesinini. The sole species, Hylurgopinus rufipes, is native to North America and serves as a principal vector of Dutch elm disease. Adults are small, brownish-red beetles that bore into elm bark to construct galleries for reproduction and overwintering.
Hymenodria
Hymenodria is a monotypic moth genus in the family Geometridae, containing a single species, Hymenodria mediodentata. The genus was erected by James Halliday McDunnough in 1954. It is native to North America. The sole species was originally described by Barnes and McDunnough in 1911.
Hypna
jazzy leafwing, marbled leafwing, silver-studded leafwing
Hypna is a monotypic butterfly genus in the family Nymphalidae, containing only Hypna clytemnestra. The species is the largest member of the tribe Anaeini and is known for its striking leaf-mimicry. The common names jazzy leafwing, marbled leafwing, and silver-studded leafwing refer to this single species. It is considered uncommon across its range.
Hypna clytemnestra
Silver-studded Leafwing, Jazzy Leafwing, Marbled Leafwing
Hypna clytemnestra is the sole species in the monotypic genus Hypna, a leafwing butterfly in the family Nymphalidae. The species is known by multiple common names reflecting its distinctive wing patterning. It is classified within the subfamily Charaxinae, tribe Anaeini, a group characterized by robust bodies and often cryptic, leaf-mimicking wing shapes.
Hypodacne
Hypodacne is a genus of beetles in the family Euxestidae, established by J.L. LeConte in 1876. The genus contains a single described species, H. punctata. These beetles are characterized by their well-polished, glossy appearance. The family Euxestidae was historically treated as part of Cerylonidae, and some sources still reflect this classification.
Idiobates castaneus
Idiobates castaneus is a North American darkling beetle and the sole member of its genus. The species is known from eastern Canada and has been documented in Ontario and Québec. Its life history includes described larval and pupal stages. The genus Idiobates is monotypic within the family Tenebrionidae.
Idiopidonia
Idiopidonia is a genus of longhorn beetles (family Cerambycidae) containing a single described species, Idiopidonia pedalis. The genus was established by Swaine and Hopping in 1928 and is classified within the subfamily Lepturinae. It represents a monotypic lineage of flower longhorns with limited documented ecological information.
Janseodes melanospila
Janseodes melanospila is the sole species in the monotypic genus Janseodes. It is a moth with a notably wide geographic range spanning three continents: Asia, Africa, and North America. The species was first described from India in 1852 and has since been recorded in South Africa and Florida, USA. Its disjunct distribution pattern suggests possible human-mediated introduction to some regions, though natural dispersal mechanisms remain unclear.
Juniperella
Juniperella is a monotypic genus of beetles in the family Buprestidae, containing only the single species Juniperella mirabilis. The genus was established by Knull in 1947. It belongs to the subfamily Buprestinae and tribe Melanophilini. Knowledge of this genus is extremely limited due to its rarity and the scarcity of observations.
Juniperella mirabilis
Juniper Metallic Wood-boring Beetle
Juniperella mirabilis is a rare metallic wood-boring beetle in the family Buprestidae, and the sole species in its genus. It is endemic to North America and associated with juniper hosts. The species was described by Knull in 1947 and remains poorly known, with very few documented observations.
Knightomiris distinctus
A small plant bug in the family Miridae, originally described as Lygus distinctus by Knight in 1917 and later transferred to the monotypic genus Knightomiris in 1973. The genus was established based on distinctive morphological features including male genitalia structure. This species belongs to a large family of true bugs commonly known as plant bugs or capsid bugs.
Kocakina
Intractable quaker moth (for sole species K. fidelis)
Kocakina is a monotypic genus of owlet moths in the family Noctuidae, established in 2006 to replace the preoccupied genus name Himella. The sole species, Kocakina fidelis (intractable quaker moth), is an early-spring flying moth of eastern North American dry woodlands. The caterpillar is known as the four-lined green fruitworm and feeds primarily on oak, elm, and flowering crabapple leaves.
Kocakina fidelis
Intractable Quaker
Kocakina fidelis, commonly known as the Intractable Quaker, is a moth species in the family Noctuidae. It is the sole member of the genus Kocakina, which was established in 2006 to replace the junior homonym Himella. The species occurs across eastern North America from Quebec and Maine south to Florida, and west to Texas and Kansas. It inhabits dry woodland environments.
Kodiosoma fulva
Kodiosoma fulva is a moth species in the family Erebidae and the sole member of the monotypic genus Kodiosoma. It occurs in the southwestern United States, specifically in Arizona, Nevada, and California. Both the genus and species were described by Richard Harper Stretch in 1872. The species epithet is sometimes rendered as 'fulvum' in older literature.
Lampracanthia
Lampracanthia is a monotypic genus of shore bugs in the family Saldidae, containing a single described species, L. crassicornis. It was established by Reuter in 1912. Shore bugs in this family are generally associated with moist habitats near water. Very little specific information is documented about this genus beyond its taxonomic placement.
Langessa nomophilalis
black langessa moth
Langessa nomophilalis, the black langessa moth, is the sole species in the genus Langessa. It is a small crambid moth in the subfamily Acentropinae. The species is endemic to the southeastern United States with a restricted coastal plain distribution. It was first described by Harrison Gray Dyar in 1906, originally placed in the genus Nymphula.
Larisa subsolana
Dark-based Larisa Moth
Larisa subsolana is a species of tortricid moth and the sole member of the monotypic genus Larisa. It occurs across a broad range of eastern and central North America. The larvae feed specifically on Carya illinoensis (pecan). The species was described by Miller in 1978.
Lariversius tibialis
Lariversius tibialis is the sole species in the monotypic genus Lariversius, a genus of darkling beetles in the family Tenebrionidae. Described by Blaisdell in 1947, this species is known from limited collection records. The genus name honors L. Rivers, and the specific epithet refers to the tibial structure.
Lauritrioza
bay sucker
Lauritrioza is a monotypic genus of psyllids (Hemiptera: Triozidae) containing the single species L. alacris. The genus is defined by its obligate association with Laurus species, on which it induces distinctive leaf-edge galls. Adults and nymphs inhabit these galls, with nymphs producing white waxy secretions. The genus has expanded from its native European range through human-mediated introduction to western North America, Brazil, and Jordan.
Lauritrioza alacris
Bay Sucker
Lauritrioza alacris is a psyllid in the family Triozidae that induces distinctive galls on bay laurel (Laurus nobilis). Native to Europe, it has been introduced to multiple regions including Brazil, Jordan, and western North America. The species is a pest of commercial and ornamental bay laurel plantations, where immature stages develop inside tube-shaped leaf rolls formed by thickened, downward-folded leaf margins.
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digitalis
Fingered Lemmeria Moth
Lemmeria digitalis is a moth species in the family Noctuidae and the sole member of its monotypic genus. First described by Augustus Radcliffe Grote in 1882 under the name Anchocelis digitalis, it was later placed in the genus Lemmeria by William Barnes and Foster Hendrickson Benjamin in 1926. The species is known from the northeastern United States, with confirmed records from Maine and Vermont.
Lepismadora algodones
Algodones Sand Jewel Beetle
Lepismadora algodones is a tiny jewel beetle (family Buprestidae) and the sole member of its genus. Described in 1987, it represents the most recently discovered new genus of jewel beetle in the United States. The species exhibits an extraordinarily restricted distribution, having been found only in a single old canal on the west side of the Algodones Sand Hills in southeastern California. Its closest known relative is the genus Eudiadora, known only from Argentina, indicating a remarkable disjunct biogeographic relationship.
Lerina incarnata
crimson-bodied lichen moth
Lerina incarnata, the crimson-bodied lichen moth, is the sole member of the monotypic genus Lerina. The species was first described by Francis Walker in 1854. It belongs to the family Erebidae, subfamily Arctiinae (tiger and lichen moths), and tribe Lithosiini (lichen moths). The species is found in Mexico and southern Arizona.
Lindera tessellatella
Bran moth
Lindera tessellatella is a small moth in the family Tineidae, the sole species in the monotypic genus Lindera. It is notable for its exceptionally broad geographic distribution across six continents, having been recorded from South America, Africa, Europe, North America, Australia, New Zealand, Fiji, and Hawaii. The species was first described by Émile Blanchard in 1852 from South America, with the genus established two years later. Adults have a wingspan of 20–30 mm.
Litiulus alaskanus
Litiulus alaskanus is a small julid millipede and the sole species in the monotypic genus Litiulus. It is endemic to the northeastern Pacific region, where it inhabits old-growth rainforests. The species is notable for its specialized diet of fungal fruiting bodies and its apparent physiological tolerance for drier conditions than most sympatric millipedes.
Lophosis
Lophosis is a monotypic genus of geometrid moths in the subfamily Sterrhinae. It contains a single species, Lophosis labeculata (the stained lophosis), described by George Duryea Hulst in 1887. The genus itself was established by Hulst in 1896. This North American moth is part of the diverse geometer moth family, which includes many species with slender bodies and cryptic wing patterns.
Lophosis labeculata
Stained Lophosis, stained lophosis moth
Lophosis labeculata, commonly known as the stained lophosis moth, is the sole species in the monotypic genus Lophosis. It is a geometrid moth found across North America. The species was first described by Hulst in 1887, with the genus established in 1896. It is relatively well-documented with over 2,400 observations.
Lyconotus
Lyconotus is a genus of net-winged beetles in the family Lycidae. The genus contains a single described species, L. lateralis. Net-winged beetles are characterized by their soft, flexible elytra with distinct net-like venation patterns. Members of this genus are found in North America, with observations documented from Florida and other southeastern states.
Machaerocera
Machaerocera is a genus of band-winged grasshoppers in the family Acrididae, established by Saussure in 1859. The genus is monotypic, containing only Machaerocera mexicana. It is classified within the tribe Machaerocerini of the subfamily Oedipodinae. The genus has been documented across a broad geographic range from the southwestern United States through Mexico to Central and South America.
Machaerodes
Machaerodes is a genus of ant-loving beetles in the family Staphylinidae, established by Brendel in 1890. The genus contains a single described species, M. carinatus. As members of the subfamily Pselaphinae, these beetles are myrmecophilous, meaning they live in association with ants.
Macreurops
Macreurops is a genus of beetles in the family Monotomidae, established by Casey in 1916. The genus is monotypic, containing only the single species Macreurops longicollis. Monotomidae, commonly known as root-eating beetles, are a small family of polyphagan beetles. Information on Macreurops beyond its taxonomic status is extremely limited.
Mallochiola gagates
Mallochiola gagates is the sole described species in the genus Mallochiola, a group of small bladder bugs in the family Microphysidae. This species belongs to the true bug order Hemiptera and is part of the cimicomorphan lineage within the suborder Heteroptera. The genus was established by McAtee and Malloch in 1924, with this species as the type. Records indicate presence in North America and Middle America, though specific details about its biology remain sparse.
Manataria
white-spotted satyr
Manataria is a monotypic genus of satyr butterflies in the family Nymphalidae, containing a single species, Manataria hercyna. The genus was established by Kirby in 1904. Members of this genus inhabit Neotropical forests.
Manataria hercyna
white-spotted satyr
Manataria hercyna, the white-spotted satyr, is the sole species in the genus Manataria within the subfamily Satyrinae. It is a Neotropical butterfly with a broad distribution across Central and South America. The species exhibits notable subspecific variation across its range, with five recognized subspecies differing in geographic distribution and subtle morphological traits.
Marchena
Marchena is a monotypic genus of jumping spiders endemic to the western United States. Its sole described species, M. minuta, inhabits conifer bark habitats along the Pacific coast. The genus is the only North American representative of the subfamily Heliophaninae. Marchena forms a monophyletic group with the genera Afraflacilla, Pseudicius, and Festucula.
Martia arizonella
snout moth
Martia arizonella is a species of snout moth in the family Pyralidae and the sole member of its genus. It was described by Émile Louis Ragonot in 1887. The species is known from arid and semi-arid regions of the southwestern United States.
Meganoplium imbelle
Meganoplium imbelle is the sole species in the monotypic genus Meganoplium, a group of longhorn beetles in the family Cerambycidae. Originally described by John Lawrence LeConte in 1881 as Elaphidion imbelle, the species was later transferred to its current genus by Linsley in 1940. It represents a rare example of a genus-level monotypy within the diverse cerambycid fauna of western North America.
Megobrium edwardsii
Megobrium edwardsii is a longhorn beetle (family Cerambycidae) and the sole species in its genus. Described by LeConte in 1873, this North American cerambycid belongs to the subfamily Cerambycinae and tribe Hyboderini. The genus name Megobrium is a synonym of Obrium in some taxonomic treatments.
Melanapamea
coastal plain apamea moth
Melanapamea is a monotypic genus of noctuid moths established by Lafontaine in 2009. The sole species, Melanapamea mixta, is a rarely collected moth with scattered populations across eastern North America. It is primarily associated with bog habitats and shows a disjunct distribution pattern with core populations in the Northeast and scattered records in the western United States.
Melanderomyia
Melanderomyia is a genus of flat-footed flies in the family Platypezidae. The genus was established by Kessel in 1960 and contains a single described species, Melanderomyia kahli. It belongs to the subfamily Melanderomyiinae, which was erected to accommodate this distinctive genus. The genus is rarely encountered, with few observations documented.
Melanolemma
Melanolemma is a genus of broad-nosed weevils in the family Curculionidae, established by Van Dyke in 1935. The genus is currently considered a synonym of Peritaxia according to the Catalogue of Life, though it remains listed as accepted in GBIF and NCBI. Only one species, M. montana, has been formally described. The genus belongs to the tribe Byrsopagini within the subfamily Entiminae.
Mellilla
Mellilla is a monotypic moth genus in the family Geometridae, established by Augustus Radcliffe Grote in 1873. Its sole species, Mellilla xanthometata (orangewing moth), was described by Francis Walker in 1862. The genus is found across most of eastern North America. Adults are active during both day and night, with two generations per year.
Menkeleon
Menkeleon is a genus of antlions in the family Myrmeleontidae, established by Stange in 1970. The genus contains a single described species, Menkeleon bellulus, which occurs in the Western United States and Mexico. Antlions in this family are characterized by their predatory larval stage, which typically construct pit traps to capture prey.
Meriellum
Meriellum is a monotypic genus of longhorn beetles in the family Cerambycidae, established by Linsley in 1957. The genus contains a single species, Meriellum proteus, classified within the tribe Callidiini of the subfamily Cerambycinae. Little detailed information is available about the biology or ecology of this genus.
Metacmaeops
Metacmaeops is a genus of longhorn beetles (Cerambycidae) in the subfamily Lepturinae, tribe Rhagiini. The genus is monotypic, containing only Metacmaeops vittata, a species distributed in the eastern United States. Members of this genus are associated with mesic forest habitats and have been documented as flower visitors.
Metopleura potosi
Metopleura potosi is a moth species in the family Gelechiidae, first described by Busck in 1912. It is the sole member of the monotypic genus Metopleura. The species is known from San Luis Potosí, Mexico, and has been documented in 29 iNaturalist observations. No detailed biological information has been published regarding its life history, host associations, or ecological role.
Metria amella
Live Oak Metria Moth
Metria amella, commonly known as the Live Oak Metria Moth, is a species of owlet moth in the family Erebidae. It is native to North America and is associated with live oak habitats. The species was described by Achille Guenée in 1852, originally placed in the genus Campometra. It is the sole species in the genus Metria, making it taxonomically distinctive among Erebidae.
Microbaris
Microbaris is a genus of flower weevils in the family Curculionidae, established by Thomas Lincoln Casey in 1892. The genus is monotypic, containing a single described species, Microbaris galvestonica. As a member of Curculionidae, it possesses the characteristic elongated snout (rostrum) typical of weevils. The genus is placed within the large superfamily Curculionoidea, which comprises the most diverse group of beetles.
Microhyus
Microhyus is a genus of true weevils (Curculionidae) established by LeConte in 1876. The genus contains at least one described species, M. setiger. As a curculionid weevil, it possesses the characteristic elongated rostrum typical of the family. The genus is poorly documented in the literature, with limited information available on its biology and ecology.
Micronaspis
Florida intertidal firefly
Micronaspis is a monotypic genus of fireflies (Lampyridae) containing a single species, Micronaspis floridana, commonly known as the Florida intertidal firefly. This rare, endemic species is restricted to intertidal salt marsh habitats along the coast of Florida and the Bahamas. It represents a classic example of geographic isolation due to its highly specialized habitat requirements.
Micronaspis floridana
Florida Intertidal Firefly, fiddler crab firefly
Micronaspis floridana is a rare, endemic firefly restricted to intertidal salt marshes along the peninsular coast of Florida and the Bahamas. The genus is monotypic, containing only this single species. It serves as a model organism for studying genetic isolation and speciation due to its highly restricted 'shoestring' geographic distribution. The species is threatened by coastal development, storm surges, and sea level rise; Hurricane Dorian severely impacted populations on Grand Bahama island.
Microtia elva
Elf, Elf Butterfly
Microtia elva, commonly known as the elf or elf butterfly, is a small butterfly species in the family Nymphalidae. It is the sole member of its genus, which is monophyletic and restricted to the southern United States and Central America. The species has been observed over 3,000 times on iNaturalist, indicating it is relatively well-documented within its range. Larvae feed on plants in the family Acanthaceae, particularly Tetramerium species.
Mimobarathra
Mimobarathra is a genus of noctuid moths erected by William Barnes and James Halliday McDunnough in 1915. The genus is monotypic, containing only the single species Mimobarathra antonito, which was described by Barnes in 1907. It is endemic to Arizona in the southwestern United States. The genus belongs to the tribe Eriopygini within the subfamily Noctuinae.
Mimobarathra antonito
Mimobarathra antonito is a monotypic noctuid moth endemic to Arizona. The genus was erected by Barnes and McDunnough in 1915, with this species originally described by Barnes in 1907. It remains poorly known beyond its type locality and basic taxonomic placement.
Mimoschinia rufofascialis
Rufous-banded Crambid Moth, Rufous-banded Pyralid Moth, Barberpole Caterpillar
Mimoschinia rufofascialis, commonly known as the Rufous-banded Crambid Moth, is the sole species in its genus. This crambid moth has been documented across a broad North American range from western Canada through the southwestern United States and into Mexico, as well as in the Caribbean. The species is attracted to artificial light sources and has been observed during summer moth surveys.
Miscodera arctica
Miscodera arctica is a ground beetle (family Carabidae) and the sole species in its genus. It has a Holarctic distribution, occurring across northern regions of North America and Eurasia. The species is placed in the subfamily Broscinae, a group of carabid beetles often associated with cool or montane habitats. As the only member of Miscodera, it represents a monotypic lineage within the diverse ground beetle fauna.
Misogada
drab prominent
Misogada is a monotypic moth genus in the family Notodontidae, containing a single species, Misogada unicolor. The genus was erected by Francis Walker in 1865. Its sole species, commonly known as the drab prominent, was described by Alpheus Spring Packard in 1864 and is distributed across eastern and central North America.
Mojavia achemonalis
Pink Bantam
Mojavia achemonalis, known as the Pink Bantam, is a small moth and the sole species in its genus. It belongs to the family Crambidae (snout moths) and is restricted to arid regions of the southwestern United States. The species was first described in 1914 and remains poorly known biologically.
Mojaviodes blanchardae
Mojaviodes blanchardae is a species of moth in the family Crambidae. It is the sole member of the monotypic genus Mojaviodes. The species was described by Munroe in 1972 and is known from Texas in North America. Very few observations of this species exist, with only four documented records.
Monoptilota pergratialis
lima-bean vine borer moth
Monoptilota pergratialis, commonly known as the lima-bean vine borer moth, is the sole species in the genus Monoptilota. It is a small pyralid moth in the subfamily Phycitinae. The species is found in the central and southeastern United States. Larvae are known to bore into the stems of lima bean plants, causing damage to cultivated crops.
Monostoecha semipectinata
Monostoecha semipectinata is a small moth and the sole species in the monotypic genus Monostoecha. It was first described by George Duryea Hulst in 1898 and later placed in its own genus by David Stephen Fletcher in 1979. The species is known from the American Southwest, with records from arid and semi-arid regions. It belongs to the family Geometridae, commonly known as inchworm or geometer moths.
Moodnodes plorella
Moodnodes plorella is a species of snout moth in the family Pyralidae, and the sole member of its genus. It was first described by Harrison Gray Dyar Jr. in 1914 from specimens collected in Panama, and later recorded from Florida. The genus Moodnodes was established by Herbert H. Neunzig in 1990 to accommodate this species.
Morius
Morius is a genus of ant-loving beetles in the rove beetle family Staphylinidae, established by Casey in 1893. The genus contains a single described species, Morius occidens. As members of the subfamily Pselaphinae, these beetles are morphologically specialized and ecologically associated with ants.
Moromorpha
Moromorpha is a genus of stink bugs in the family Pentatomidae, established by Rolston in 1978. The genus contains a single described species, Moromorpha tetra. As a pentatomid genus, it belongs to the diverse group of true bugs characterized by shield-shaped bodies and scent glands. Very little specific biological information has been published about this genus.
Mouralia
Mouralia is a monotypic genus of moths in the family Noctuidae, containing the single species Mouralia tinctoides. The genus was established by Walker in 1858. Larvae are specialized feeders on plants in the family Commelinaceae, including Tradescantia and Commelina species. The species has a broad New World distribution spanning subtropical and tropical regions of the Americas.
Mouralia tinctoides
Mouralia tinctoides is a small moth and the sole species in its genus, Mouralia. It belongs to the subfamily Plusiinae within the Noctuidae family. The species exhibits a broad distribution across the Americas, ranging from the southern United States through the Caribbean and Central America to South America. Despite its wide geographic range, published biological and ecological information remains limited.
Myrmecothea
Myrmecothea is a genus of picture-winged flies in the family Ulidiidae, established by Hendel in 1910. The genus contains a single described species, Myrmecothea myrmecoides (Loew, 1860). These flies are recognized for their distinctive wing patterns and ant-mimicking appearance. Records indicate limited but documented observations across their known range.
Myrmedophila
Myrmedophila is a monotypic genus of silken fungus beetles (family Cryptophagidae) containing a single described species, Myrmedophila americana. The genus name, derived from Greek roots meaning 'ant-loving,' suggests an ecological association with ants, though specific details remain poorly documented. The group is rarely encountered, with minimal observational records.
Naera fuscocristatella
Naera fuscocristatella is a small moth in the family Gelechiidae, first described by Chambers in 1875. It is the sole species in the genus Naera. The species is known from scattered records across the south-central United States, with documented occurrences in Alabama, Kansas, Louisiana, Mississippi, Tennessee, and Texas. Very few observations exist in public databases, suggesting it may be genuinely rare, undercollected, or difficult to detect.
Nannobotys commortalis
Sunshine Bantam
Nannobotys commortalis is a small crambid moth and the sole species in its genus. It occurs in western North America from eastern Washington through California to Nevada. The common name 'Sunshine Bantam' refers to its small size and diurnal activity pattern. Adults have been observed flying during daylight hours, an uncommon trait among moths.
Nannothemis
elfin skimmer
Nannothemis is a monotypic genus of dragonflies in the family Libellulidae, containing a single species, Nannothemis bella (elfin skimmer). It is the smallest dragonfly in North America, with males exhibiting powdery blue coloration and females displaying black and yellow wasp-like patterning. The genus is native to eastern North America, where it inhabits specialized wetland habitats.
Nanomyina
Nanomyina is a monotypic genus of long-legged flies in the family Dolichopodidae, containing only Nanomyina barbata. The genus was established by Harold E. Robinson in 1964. The single species is distinguished by conspicuous bristles on the lower face, referenced in its specific epithet "barbata" (Latin for "bearded").
Neaphaenops
Neaphaenops is a monotypic genus of cave-dwelling ground beetles (Carabidae: Trechinae) established by Jeannel in 1920. Its sole species, Neaphaenops tellkampfii, is a troglobitic predator found in cave systems of the United States. The species exhibits subspecific variation in foraging behavior correlated with distinct cave microhabitats.
Nearctitychus
Nearctitychus is a genus of ant-loving beetles in the family Staphylinidae, established by Chandler in 1988. The genus is monotypic, containing a single described species, N. sternalis. As a member of the subfamily Pselaphinae and tribe Tychini, these beetles are myrmecophilous, meaning they live in association with ant colonies.
Negalasa fumalis
Negalasa fumalis is a snout moth and the sole species in the monotypic genus Negalasa. It was described from Arizona in 1913 by William Barnes and James Halliday McDunnough. The genus and species were established in the same publication. It belongs to the subfamily Chrysauginae within the family Pyralidae.
Neoapachella rothi
Neoapachella rothi is a mygalomorph trapdoor spider and the sole species in its genus. It was described in 2002 and is endemic to the southwestern United States. The species name honors arachnologist Vincent D. Roth, while the genus name references the Apache peoples. Adults reach approximately 20.7 mm in body length.
Neococytius
Cluentius sphinx
Neococytius is a monotypic moth genus in the family Sphingidae, containing only the species Neococytius cluentius, commonly known as the Cluentius sphinx. This large sphinx moth has an exceptionally long proboscis, historically measured at approximately 25 cm, which has been discussed in relation to pollination of night-blooming cacti. The genus was erected by Ronald W. Hodges in 1971, with the sole species originally described by Pieter Cramer in 1775.
Neocrania bifasciata
Neocrania bifasciata is a small moth species and the sole member of the genus Neocrania. It belongs to the family Eriocraniidae, a primitive group of Lepidoptera. The species is endemic to the Coast Ranges of southern California and was described by Davis in 1978. It is one of the few eriocraniid species found in western North America.
Neotarache deserticola
Neotarache deserticola is a moth species and the sole member of its genus, first described by William Barnes and Foster Hendrickson Benjamin in 1922. The species is endemic to Nevada, USA. The genus Neotarache is monotypic within the family Noctuidae, subfamily Condicinae. Available records indicate limited observational data, with 34 iNaturalist observations documented.
Nesoselandria morio
Moss Sawfly
Nesoselandria morio is a species of sawfly in the family Tenthredinidae, and is the sole member of the genus Nesoselandria. It is commonly known as the Moss Sawfly. The species has been recorded in parts of Europe, particularly Belgium, and in Canada. As a sawfly, it belongs to the suborder Symphyta, which are distinguished from other Hymenoptera by a broad connection between the thorax and abdomen without the narrow waist (petiole) seen in ants, bees, and wasps.
Niphograpta
water hyacinth moth
Niphograpta is a monotypic genus of crambid moths established by Warren in 1892. The sole species, Niphograpta albiguttalis, commonly called the water hyacinth moth, has been widely introduced outside its native range as a biological control agent for the invasive aquatic plant water hyacinth (Eichhornia crassipes). The genus is notable for its specialized ecological role and successful establishment in multiple continents.
Notamblyscirtes
Notamblyscirtes is a genus of grass skippers in the butterfly family Hesperiidae. The genus contains a single described species, Notamblyscirtes simius. It was established by Scott in 2006. The genus is poorly documented, with limited published information available on its biology and ecology.
Nymphuliella daeckealis
China Mark Moth
Nymphuliella daeckealis, commonly known as the China Mark Moth, is the sole species in the monotypic genus Nymphuliella. It was first described by F. Haimbach in 1915 under the basionym Diathrausta daeckealis. The genus was established by William Harry Lange in 1956. The species belongs to the subfamily Acentropinae within the family Crambidae.
Occidentalia comptulatalis
Occidentalia comptulatalis is a small crambid moth and the sole member of the monotypic genus Occidentalia. It is found in northern North America, primarily in Canada and the northern United States. The species was originally described as Crambus comptulatalis before being placed in its own genus. Despite its relatively broad geographic range, it remains poorly studied with limited published information on its biology.
Octogomphus specularis
Grappletail, Club-tailed dragonfly
Octogomphus specularis, commonly known as the grappletail or club-tailed dragonfly, is the sole species in its genus. It is a North American dragonfly distinguished by a club-like widening at the end of its abdomen. Larvae are specialized to lake outlet streams, where warmer thermal conditions support development at the northern range limit. The species has a three-year life cycle and reaches its northernmost distribution in British Columbia, Canada.
Odontoptila obrimo
Orbed Wave
Odontoptila obrimo, known as the Orbed Wave, is the sole species in the monotypic genus Odontoptila. This geometrid moth is found from the southern United States through Central America. It belongs to the subfamily Sterrhinae, a group commonly referred to as waves due to their characteristic wing patterns.
Opacinota
Opacinota is a genus of tortoise beetles (family Chrysomelidae, subfamily Cassidinae) described by E. Riley in 1986. It is monotypic, containing only the single species O. bisignata. Tortoise beetles are known for their domed, shield-like body shape that extends from the pronotum to cover the elytra. The genus belongs to the tribe Cassidini within the leaf beetle family.
Opisthius
Opisthius is a monotypic genus of ground beetles in the family Carabidae, containing the single species Opisthius richardsoni. The genus is classified within the subfamily Nebriinae and tribe Opisthiini. Its sole species is distributed across northern North America, from Alaska and Yukon south to California and New Mexico. The genus is notable for its strong superficial resemblance to tiger beetles (Cicindelinae), which has led to frequent misidentification by collectors.
Oreoleptis torrenticola
Oreoleptis torrenticola is the sole species in the monotypic genus Oreoleptis and family Oreoleptidae, a family of flies established in 2005 based on this single species. The species was described from specimens collected in the Rocky Mountains, where its larvae inhabit torrential streams and have also been found in groundwater wells. This enigmatic dipteran represents a distinct lineage whose larval morphology shows similarities to Athericidae and Tabanidae but possesses distinctive abdominal prolegs.
Origanates rostratus
Origanates rostratus is a species of dwarf spider and the sole member of the monotypic genus Origanates. It was first described by James Henry Emerton in 1882 and later placed in its current genus by C. R. Crosby and S. C. Bishop in 1933. The species is endemic to the United States and belongs to the family Linyphiidae, commonly known as sheet-web weavers or money spiders.
Orimodema
broad-nosed weevils
Orimodema is a monotypic genus of broad-nosed weevils in the family Curculionidae, containing a single described species, O. protracta. The genus was established by Horn in 1876 and is classified within the tribe Byrsopagini of subfamily Entiminae. Observations are concentrated in Mexico and the United States.
Osmidus
Osmidus is a genus of longhorn beetles in the family Cerambycidae, established by LeConte in 1873. The genus is monotypic, containing only the single species Osmidus guttatus. It belongs to the subfamily Cerambycinae and tribe Hesperophanini. The genus has been documented in 76 iNaturalist observations.
Osmopleura chamaeropis
Cabbage Palm Longhorn
Osmopleura chamaeropis is a longhorn beetle (Cerambycidae) and the sole species in its genus. It was described by George Henry Horn in 1893. The species is endemic to the southeastern United States, where it is associated with cabbage palm (Sabal palmetto). Its common name reflects this host relationship.
Pachyonychis
A genus of flea beetles (family Chrysomelidae) established by H. Clark in 1860, containing a single described species, Pachyonychis paradoxa. The genus name has been subject to taxonomic confusion due to its similarity to the related genus Pachyonychus.
Pachyonychus
Pachyonychus is a genus of flea beetles in the family Chrysomelidae, established by F.E. Melsheimer in 1847. The genus contains a single described species, P. paradoxus, from the United States. The genus name is notably similar to Pachyonychis, a different flea beetle genus containing P. paradoxa, which was named in 1860 and occurs on the same host plant. This nomenclatural similarity has caused historical confusion between the two taxa.
Pachyonychus paradoxus
Greenbriar Leaf Beetle
Pachyonychus paradoxus is a flea beetle species in the family Chrysomelidae, representing the sole described species in its genus. It occurs in the United States and is commonly known as the Greenbriar Leaf Beetle. The species was first described by F.E. Melsheimer in 1847. As a member of the flea beetle group, it possesses enlarged hind femora adapted for jumping. The genus Pachyonychus is monotypic, with no other described species.
Pagara
Pagara is a monotypic moth genus in the family Erebidae, established by Francis Walker in 1856. Its sole species, Pagara simplex (the mouse-colored lichen moth), occurs across the eastern and central United States. The genus belongs to the subfamily Arctiinae (tussock moths) and tribe Lithosiini (lichen moths). Adults are small with a wingspan of approximately 23 mm. Formerly, Pagara fuscipes was included but has been reclassified.
Paradiplocampta
Paradiplocampta is a genus of bee flies (family Bombyliidae) established by Hall in 1975. The genus is monotypic, containing a single described species, P. tabeti, known from the southwestern United States. As a member of the subfamily Anthracinae and tribe Villini, it belongs to a group of bee flies characterized by robust bodies and often mimetic coloration.
Parahypenodes quadralis
Masked Parahypenodes, masked parahypenodes moth
Parahypenodes quadralis is a small moth and the sole species in the monotypic genus Parahypenodes. It was described from Quebec, Canada in 1918. The species remains poorly known, with limited documentation of its biology and ecology.
Paralichus
toe-winged beetles
Paralichus is a genus of toe-winged beetles in the family Ptilodactylidae, established by White in 1859. The genus is monotypic, containing a single described species, P. trivittus. Toe-winged beetles are characterized by their distinctive expanded hind tarsi. Members of this family are generally associated with riparian or moist habitats.
Paranoplium gracile
Paranoplium gracile is a longhorn beetle (family Cerambycidae) and the sole species in its genus. It was described by LeConte in 1881 and is native to North America. The species belongs to the subfamily Cerambycinae and tribe Oemini. It is represented by 238 observations on iNaturalist, indicating it is documented but not particularly abundant in collections.
Parapamea
Parapamea is a genus of owlet moths in the family Noctuidae, established by Bird in 1927. The genus contains a single described species, Parapamea buffaloensis, described by Grote in 1877. These moths belong to the diverse subfamily Noctuinae, one of the largest groups within the Noctuidae.
Paraphausis
Paraphausis is a genus of fireflies (family Lampyridae) established by Green in 1949. The genus contains a single described species, Paraphausis eximius. It belongs to the tribe Lampyrini within the subfamily Lampyrinae. The genus is rarely observed, with only seven documented observations on iNaturalist.
Paraphilaenus
Paraphilaenus is a genus of spittlebugs in the family Aphrophoridae, established by Vilbaste in 1962. The genus is currently monotypic, containing only Paraphilaenus notatus. Species in this genus are found in Central Asia. As a member of the tribe Philaenini, it shares affinities with the genus Philaenus, though it is distinguished by specific morphological and geographic characteristics.
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.
Pedomoecus
early smoky wing sedges
Pedomoecus is a genus of caddisflies in the family Apataniidae, established by Ross in 1947. The genus contains one described species, Pedomoecus sierra. Members are classified as "early smoky wing sedges," indicating spring-emerging adults with darkened wings.
Penelomax
Penelomax is a genus of spiny crawler mayflies in the family Ephemerellidae, established by Jacobus and McCafferty in 2008. The genus contains a single described species, Penelomax septentrionalis. These mayflies belong to the order Ephemeroptera, a group characterized by short adult lifespans and aquatic larval stages.
Philotes sonorensis
Sonoran blue, stonecrop blue
Philotes sonorensis, the Sonoran blue or stonecrop blue, is the sole species in the monotypic genus Philotes. This small butterfly is found in the southwestern United States and northern Mexico, inhabiting arid rocky environments. The species has a wingspan of 22–25 mm. Larvae are specialized feeders on Dudleya species (stonecrops), boring into leaves. The subspecies P. s. extincta from the upper San Gabriel River wash was declared extinct in 1970 after three decades of annual sampling documented its disappearance.
Philoxenus desertorum
Philoxenus desertorum is a species of clown beetle in the family Histeridae. It was described by Mazur in 1991 and is currently the sole described species in the genus Philoxenus. The species has been recorded from desert regions in California, USA, and Sonora, Mexico. Taxonomic authorities treat this name as a synonym of Hypocaccus desertorum.
Phlyctaina irrigualis
Skirted Owlet
Phlyctaina irrigualis, commonly known as the Skirted Owlet, is the sole species in the monotypic genus Phlyctaina. This moth belongs to the subfamily Herminiinae within Erebidae, a group often associated with litter-dwelling habits. The species was described by Heinrich Benno Möschler in 1890 and occurs in North America. The common name "Skirted Owlet" likely refers to wing margin characteristics typical of this group.
Phormia
black blow fly
Phormia is a genus of blow flies in the family Calliphoridae. The genus contains a single species, Phormia regina, commonly known as the black blow fly. This species is native to North America and is among the most important insects in forensic entomology due to its predictable colonization of carrion and well-documented developmental rates. Adults are metallic blue or green in coloration and are distinguished by several morphological features including black gena, mostly white calypters, and orange-yellow anterior thoracic spiracles surrounded by bright orange setae.
Phoroctenia
Phoroctenia is a genus of true crane flies (family Tipulidae) in the subfamily Ctenophorinae. The genus is monotypic, containing only the single described species P. vittata (Meigen, 1830). It has a disjunct distribution spanning northern Europe, eastern Russia, and western North America. The genus was established by Coquillett in 1910.
Phryganeopsis brunnea
Phryganeopsis brunnea is a species of moth in the family Tineidae, the sole member of its monotypic genus. It is endemic to California. The species was described by Walsingham in 1881. Very little is known about its biology or ecology beyond its taxonomic placement and geographic occurrence.
Phryxus caicus
Caicus Sphinx
Phryxus caicus is a sphinx moth and the sole species in its genus. It occurs primarily in the Neotropics with occasional records from the southeastern United States. Adults fly mainly during late summer and fall in temperate regions, though activity may continue year-round in tropical areas. Larvae feed on plants in the dogbane family.
Piosoma setosum
Piosoma setosum is a species of ground beetle in the family Carabidae, notable as the sole member of its monotypic genus. First described by LeConte in 1847, this beetle occurs in North America. The genus name derives from Greek, reflecting its distinctive setose (bristly) characteristics. Despite its taxonomic uniqueness, detailed biological information remains limited.
Placoschema
Placoschema is a monotypic genus of longhorned beetles (family Cerambycidae) in the tribe Trachyderini, established by Chemsak & Hovore in 2010. The genus contains a single species, Placoschema dimorpha, which exhibits striking sexual dimorphism in coloration. The genus was described from Mexican specimens, with the first U.S. record documented from Arizona in 2013. Members are notably small and somberly colored compared to other Trachyderini, which may have contributed to their being overlooked by collectors.
Plagioneurus univittatus
Plagioneurus univittatus is a species of long-legged fly in the family Dolichopodidae. It is the sole member of the genus Plagioneurus and the only species in the subfamily Plagioneurinae. The species was described by Loew in 1857. It is distinguished from all other dolichopodid flies by its unique subfamily-level classification.
Platyoplus gilaensis
Gila Shieldback
Platyoplus gilaensis, commonly known as the Gila Shieldback, is a species of shield-backed katydid in the family Tettigoniidae. It is the sole described species in the monotypic genus Platyoplus. The species was described by Tinkham in 1973 and is known from the southwestern United States.
Platyusa sonomae
Platyusa sonomae is a species of rove beetle in the family Staphylinidae. It is the sole described species in the monotypic genus Platyusa. The species is found in the western United States, particularly in California and Arizona, with scattered records elsewhere.
Plectrodera
cottonwood borer
Plectrodera is a monotypic genus of longhorned beetles (family Cerambycidae) containing the single species Plectrodera scalator, commonly known as the cottonwood borer. The species is among the largest and most visually distinctive cerambycids in North America, recognized by its striking black-and-white checkered pattern formed by dense mats of white setae on a glossy black body. Adults are associated with cottonwood (Populus deltoides) and are found across the eastern two-thirds of the United States, particularly in the Great Plains.
Pleromella opter
Pleromella opter is a moth species and the sole member of the monotypic genus Pleromella within the family Noctuidae. It is endemic to western North America, occurring in southern Oregon, California, and Baja California. The species was first described by Harrison Gray Dyar Jr. in 1921. It is one of approximately 124 observed records documented in natural history databases.
Plesiocis
Plesiocis is a genus of minute tree-fungus beetles in the family Ciidae. The genus contains a single described species, Plesiocis cribrum. Members of Ciidae are typically associated with decaying wood and fungal growth. The genus was established by Casey in 1898.
Plesiocis cribrum
Plesiocis cribrum is a small beetle species in the family Ciidae (minute tree-fungus beetles), described by Casey in 1898. It is the sole member of its genus, which is distinguished from other ciid genera by specific morphological features of the elytra and antennae. The species has been documented in western Canada, with records from Alberta, British Columbia, and Manitoba. Like other Ciidae, it is presumed to be associated with fungal decay in wood, though specific ecological details remain poorly documented.
Plesioclytus
Plesioclytus is a genus of longhorn beetles in the family Cerambycidae, established by Giesbert in 1993. The genus is monotypic, containing only Plesioclytus relictus. It belongs to the tribe Plesioclytini, which was erected to accommodate this genus. The genus is classified within the subfamily Cerambycinae.
Podagra crassipes
Podagra crassipes is the sole species in the monotypic genus Podagra, a group of moths in the family Noctuidae. The species was described by John Bernhardt Smith in 1902 and is known only from the US state of Arizona. As the only member of its genus, it represents a distinct lineage within the Grotellinae subfamily.
Podiasa
Podiasa is a genus of small moths in the family Yponomeutidae, established by August Busck in 1900. The genus contains a single described species, Podiasa chiococcella, also described by Busck in the same year. Yponomeutidae moths are commonly known as ermine moths, though specific common names for Podiasa have not been recorded. The genus is poorly documented in scientific literature.
Poecilobrium chalybeum
Poecilobrium chalybeum is a small longhorn beetle and the sole species in the monotypic genus Poecilobrium. It was first described from California in 1873 by John Lawrence LeConte. The genus was established by Horn in 1883. Records indicate presence in California, Mexico, and the broader United States.
Policocnemis ungulatus
Policocnemis ungulatus is a moth species in the family Noctuidae. It is the sole species of the monotypic genus Policocnemis. The species was described from Texas in 1932. It remains poorly known with limited biological data available.
Polydontomyia
dimorphic sickleleg
Polydontomyia is a monotypic genus of hoverflies (family Syrphidae) containing a single species, Polydontomyia curvipes. The genus was established by Williston in 1896 and was formerly classified under Lejops. The species is commonly known as the dimorphic sickleleg, a reference to its distinctive leg morphology.
Polydontomyia curvipes
Dimorphic Sickleleg
Polydontomyia curvipes, commonly known as the dimorphic sickleleg, is a species of hoverfly (family Syrphidae) and the sole member of its monotypic genus. Formerly classified under Lejops, it was reassigned to the resurrected genus Polydontomyia based on morphological and phylogenetic evidence. The species exhibits sexual dimorphism in leg structure, with males possessing the distinctive curved hind legs referenced in its specific epithet. As a member of the Eristalini tribe, it is associated with aquatic or semi-aquatic larval habitats typical of rat-tail maggot flies.
Polygrammate
Polygrammate is a monotypic moth genus in the family Noctuidae, containing a single species, Polygrammate hebraeicum (Hebrew moth). The genus was established by Jacob Hübner in 1818. Adults are active during summer months in eastern North America.
Porphyrorhegma fortunata
Porphyrorhegma fortunata is a moth species in the family Crambidae, subfamily Odontiinae. It is the sole member of its genus, described by Munroe in 1961. The species has been recorded from California, North America. Very few observations exist, and most aspects of its biology remain undocumented.
Praeacedes atomosella
Praeacedes atomosella is a small moth in the family Tineidae, notable as the sole species in its genus. It has a remarkably wide geographic distribution spanning multiple continents, including Europe, Australia, Hawaii, and the Americas. The species has been frequently misidentified in various regions, complicating accurate distribution records. Its broad range suggests either natural dispersal capabilities or human-mediated transport.
Praeschausia zapata
Praeschausia zapata is the sole species in the monotypic moth genus Praeschausia, erected by Foster Hendrickson Benjamin in 1932. The species was originally described by William Schaus in 1920 under the basionym Kalkoma zapata. It belongs to the family Notodontidae (prominent moths) and is known from Mexico. The genus name Praeschausia honors Schaus, the original describer.
Priognathus
Priognathus is a genus of dead log beetles in the family Pythidae, established by LeConte in 1850. The genus contains a single described species, Priognathus monilicornis. Members of this genus are part of the small family Pythidae, which is associated with decaying wood habitats. Information on the biology and ecology of Priognathus remains limited due to its rarity and the scarcity of observations.
Prionochaeta
small carrion beetles
Prionochaeta is a monotypic genus of small carrion beetles in the family Leiodidae. The sole described species, P. opaca, is found in North America and feeds on decaying animal matter. These beetles are part of the subfamily Cholevinae and contribute to decomposition and nutrient cycling in carrion habitats.
Procymbopteryx belialis
Procymbopteryx belialis is a small crambid moth and the sole member of its genus. It has been documented in the Mexican state of Guerrero and in southern Arizona, USA. The species was described by Druce in 1899. Records suggest it occupies arid or semi-arid environments in the southwestern United States and western Mexico.
Prolutacea
firefly
Prolutacea is a genus of fireflies (family Lampyridae) described by Cicero in 2006. The genus contains a single described species, Prolutacea pulsator. As a member of the subfamily Lampyrinae and tribe Lampyrini, it belongs to a diverse group of bioluminescent beetles. The genus is known from limited observations, with only 9 records documented on iNaturalist.
Provia argentata
Provia argentata is a moth species and the sole member of the monotypic genus Provia within the family Noctuidae. It was first described in 1910 by entomologists William Barnes and James Halliday McDunnough. The species is endemic to Utah, United States. As the only known species in its genus, it represents a unique lineage among noctuid moths.
Psectraglaea carnosa
pink sallow
Psectraglaea carnosa, commonly known as the pink sallow, is a noctuid moth native to North America. It is the sole species in its genus, which was established by George Hampson in 1906. The species is listed as threatened in Connecticut and as a species of special concern in Massachusetts, indicating regional population concerns.
Psenocerus
Psenocerus is a genus of longhorned beetles in the family Cerambycidae, subfamily Lamiinae. The genus is monotypic, containing only the species Psenocerus supernotatus, described by Thomas Say in 1823. Commonly known as the Currant-tip Borer, this small beetle exhibits remarkable ant mimicry, with adults measuring approximately 4 millimeters in length. The genus was established by LeConte in 1852.
Pseudacysta
avocado lace bug
Pseudacysta is a monotypic genus of lace bugs (family Tingidae) containing a single described species, P. perseae. The genus is notable for its specialized association with avocado as a host plant. The sole species is a significant agricultural pest causing foliar damage to avocado crops and has undergone substantial range expansion across the Americas.
Pseudamara
Pseudamara is a monotypic genus of ground beetles (Carabidae) established by Lindroth in 1968. The genus contains a single species, Pseudamara arenaria, a small carabid beetle in the tribe Zabrini. It is known from limited records in the northeastern United States.
Pseudariotus
Pseudariotus is a genus of ant-like leaf beetles in the family Aderidae, established by Casey in 1895. The genus contains a single described species, P. notatus. Members of this genus belong to a group of small beetles that exhibit morphological convergence with ants, a characteristic feature of the family Aderidae.
Pseudethmia protuberans
Pseudethmia protuberans is a small moth and the sole species in its genus. It is endemic to the lower elevation deserts of south-eastern California and probably north-eastern Baja California. The species was described by Clarke in 1950. It belongs to the family Ethmiidae, a group of small moths often associated with arid habitats.
Pseudhapigia brunnea
Hollow-spotted Prominent
Pseudhapigia brunnea is a moth species in the family Notodontidae, commonly known as the Hollow-spotted Prominent. It is the sole member of the monotypic genus Pseudhapigia. The species was first described by William Schaus in 1901 from Guadalajara, Mexico, and is known to occur in North America.
Pseudocopaeodes
Pseudocopaeodes is a genus of skipper butterflies in the family Hesperiidae, described by Skinner & Williams in 1923. The genus contains a single recognized species, Pseudocopaeodes eunus (alkali skipper). As a hesperiine skipper, it belongs to the grass skipper subfamily. The genus is native to western North America.
Pseudomethia arida
Pseudomethia arida is a species of longhorn beetle in the family Cerambycidae. It is the sole member of its genus, Pseudomethia. The species was described by Linsley in 1937 and is found in arid regions of the southwestern United States and northwestern Mexico.
Pseudopilema
Pseudopilema is a monotypic genus of longhorn beetles (Cerambycidae) containing a single species, Pseudopilema hoppingi. The genus was established by Linsley in 1940, with the sole species described earlier by Van Dyke in 1920. It belongs to the tribe Hyboderini within the subfamily Cerambycinae.
Pseudoschinia
Pseudoschinia is a monotypic genus of crambid moths established by Munroe in 1961. The sole species, Pseudoschinia elautalis, is a specialist herbivore of cacti in the southwestern United States and northern Mexico. Adults are small moths with distinctive pale yellow forewings and white hindwings. The genus is notable for its narrow ecological association with columnar and cholla cacti.
Pseudoschinia elautalis
Desert Bantam
Pseudoschinia elautalis, commonly known as the Desert Bantam, is a small moth in the family Crambidae. It is the sole member of its genus, making the genus monotypic. The species is restricted to arid regions of the southwestern United States and northern Mexico. Adults are active during warmer months and are associated with desert habitats.
Pseudoschoenobius opalescalis
Pseudoschoenobius opalescalis is a moth species in the family Crambidae. It is the sole member of its genus. The species has been recorded from dry, sandy habitats across scattered localities in western and central North America.
Pseudostrangalia
Pseudostrangalia is a monotypic genus of longhorn beetles (Cerambycidae) in the subfamily Lepturinae. The genus contains a single described species, Pseudostrangalia cruentata. It was established by Swaine and Hopping in 1928. Members of this genus are classified within the tribe Lepturini, a group commonly known as flower longhorns due to their frequent association with flowers as adults.
Pseudothyatira cymatophoroides
Tufted Thyatirine Moth, tufted thyatirid moth
The tufted thyatirine moth is the sole species in the monotypic genus Pseudothyatira, placed in family Drepanidae (hooktip and false owlet moths). It is recognized for its complex bark-mimicking coloration that provides camouflage against tree trunks. The species exhibits a distinctive tufted thorax and intricate wing patterns that have drawn attention from naturalists. It represents a North American endemic with a transcontinental distribution across forested regions.
Pseudoxylosteus ornatus
Pseudoxylosteus ornatus is a small flower longhorn beetle in the family Cerambycidae, subfamily Lepturinae. It is the sole species in its genus, described by LeConte in 1873. Adults are approximately 10 mm in length and occur in the western United States.
Psilocnemis
Psilocnemis is a genus of myrmecophilic beetles in the family Scarabaeidae, established by Burmeister in 1842. The genus contains a single described species, P. leucosticta. These beetles are associated with ants, though specific details of this relationship remain poorly documented. The genus belongs to the tribe Cremastocheilini, a group known for ant-associated scarab beetles.
Pterotermes
Pterotermes is a monotypic genus of drywood termites in the family Kalotermitidae, containing only Pterotermes occidentis. This primitive termite is the largest drywood termite in the southwestern United States deserts and exhibits the simple life cycle characteristic of its family, lacking a true worker caste. Colonies develop entirely within a single piece of timber, making it a cryptic inhabitant of dead desert wood.
Pterotermes occidentis
western dry-wood termite
Pterotermes occidentis is a primitive dry-wood termite and the sole species in the monotypic genus Pterotermes. It inhabits extremely arid environments in the Sonoran Desert region, living entirely within single pieces of dry timber. Unlike many termites, it does not maintain contact with soil and completes its entire life cycle within its wood host.
Ptycerata busckella
Ptycerata busckella is a small moth and the sole member of the monotypic genus Ptycerata in the family Gelechiidae. It is endemic to eastern North America with records limited to six states in the northeastern and midwestern United States. The species was described by Charles Russell Ely in 1910 and remains poorly known, with only 12 observations documented on iNaturalist.
Purealus beckelorum
A recently described cleonine weevil endemic to the southern High Plains, representing the type species of its monotypic genus. Distinguished from all other world Cleonini by two unique character states: widely separated procoxae and a distinctly tumescent, asperate base of elytral interval 3. A moderately robust, wingless species with body length 7.8–9.4 mm. Known from only nine specimens despite targeted collecting efforts.
Pycnocoris
Pycnocoris is a monotypic genus of plant bugs in the family Miridae, established by Van Duzee in 1914. The genus contains a single described species, P. ursinus. As a member of Miridae, it belongs to the large and diverse group of true bugs known as plant bugs or mirid bugs.
Quadrina diazoma
Quadrina diazoma is the sole species in the monotypic genus Quadrina, described by Augustus Radcliffe Grote in 1881. This lappet moth (family Lasiocampidae) is restricted to the southwestern United States. As a monotypic genus, it represents a distinct lineage within the Lasiocampidae with no close relatives sharing its generic classification.
Raphiptera
diminutive grass-veneer
Raphiptera is a monotypic genus of crambid moths containing a single species, Raphiptera argillaceellus, commonly known as the diminutive grass-veneer. The genus is characterized by its small size and restricted bog-dwelling habitat. It was described by Hampson in 1896.
Raphiptera argillaceellus
Diminutive Grass-veneer
Raphiptera argillaceellus, the Diminutive Grass-veneer, is a small crambid moth and the sole member of its monotypic genus. It occurs across eastern North America from Labrador and Quebec south to Florida and Texas, with records extending to Costa Rica. The species is strongly associated with bog habitats. Adults are small with relatively plain, clay-colored forewings that give the species its specific epithet.
Rhodocantha diagonalis
Rhodocantha diagonalis is a small moth species and the sole member of its genus. It was described by Munroe in 1961 and belongs to the family Crambidae, subfamily Odontiinae. The species is known from a restricted geographic range in the southwestern United States.
Rhynchus apiculatus
hidden snout weevil
Rhynchus apiculatus is a species of hidden snout weevil in the family Curculionidae, described by Kissinger in 1964. It is the sole member of the monotypic genus Rhynchus. The genus name derives from the Greek ῥύγχος (rhynchos), meaning snout. The species has been recorded from North America.
Rhyzopertha
Grain-borers
Rhyzopertha is a monotypic genus of beetles in the family Bostrichidae (false powderpost beetles). The sole species, Rhyzopertha dominica, is commonly known as the lesser grain borer and is a major worldwide pest of stored cereal grains and peanuts. The genus is characterized by its cylindrical body form and association with dry stored products.
Rifseria
Rifseria is a monotypic genus of gelechiid moths established by Hodges in 1966. The genus contains a single species, Rifseria fuscotaeniaella, distributed across western North America. The larvae are leaf miners specializing on plants in the Asteraceae family.
Rifseria fuscotaeniaella
Rifseria fuscotaeniaella is a small moth and the sole species in the monotypic genus Rifseria, family Gelechiidae. It is endemic to western North America, ranging from the Canadian prairies through the Rocky Mountain region to the Pacific coast. The species was originally described as Gelechia fuscotaeniaella by Chambers in 1878. It is associated with arid and semi-arid habitats including sagebrush steppe and dry open woodlands.
Rilettius socius
Rilettius socius is a small beetle species in the family Anthicidae, described by Abdullah in 1964. Members of this family are commonly known as ant-like flower beetles due to their convergent resemblance to ants. The genus Rilettius is monotypic, containing only this species. Published information on its biology and ecology is extremely limited.
Rileyonymus
minute seed weevils
Rileyonymus is a genus of minute seed weevils in the family Curculionidae. It contains a single described species, R. relictus. The genus was established by W.G. Dietz in 1896.
Ruacodes tela
Ruacodes tela is a moth species in the family Noctuidae, the only member of the monotypic genus Ruacodes. It was first described by John Bernhardt Smith in 1900 and is found in Arizona, United States. The genus was erected by George Hampson in 1908.
Rustleria
Rustleria is a monotypic genus of beetles in the family Teredidae, established by Stephan in 1989. The genus contains a single described species, R. obscura. Teredidae, formerly treated as a subfamily of Tenebrionidae, comprises small to medium-sized beetles often associated with dead wood and fungal habitats.
Sagenosoma elsa
Elsa Sphinx, elsa sphinx moth
Sagenosoma elsa is a monotypic species of sphinx moth in the family Sphingidae, known as the Elsa Sphinx. It is the sole member of its genus and occurs in the southwestern United States and northern Mexico. The species was first described by Strecker in 1878 under the name Sphinx elsa. Like other sphingid moths, adults are likely capable of sustained hovering flight and rapid, agile movement.
Sagotylus
Sagotylus is a genus of leaf-footed bugs in the family Coreidae, established by Mayr in 1865. The genus contains a single described species, S. confluens. Members of this genus are true bugs (Hemiptera) within the suborder Heteroptera.
Saltonia incerta
Rare sheet-web-weaving spider, sole representative of monotypic genus Saltonia. Restricted to salt crusts of intermittent or dry lakes, streams, and rivers in desert southwestern North America. Previously presumed extinct following 1905 flooding of type locality at Salton Sea, but rediscovered in 1990s at multiple sites. Genetic analyses reveal significant population structure with two major clades (New Mexico versus California-northern Baja California) and minimal gene flow among isolated populations in fragmented desert salt flat habitats.
Sarasota plumigerella
Sarasota plumigerella is a species of moth in the family Pyralidae, subfamily Phycitinae, first described by George D. Hulst in 1900. The genus Sarasota is monotypic, containing only this single species. Like other members of the Phycitinae, it is presumed to be a small moth with larvae that likely feed on plant material, though specific life history details remain poorly documented. The species epithet and genus name reference Sarasota, Florida, suggesting a type locality or association with this region.
Schizax senex
Schizax senex is a species of longhorn beetle (Cerambycidae) and the sole member of the monotypic genus Schizax. The species was described by John Lawrence LeConte in 1873. It belongs to the tribe Trachyderini within the subfamily Cerambycinae. Based on distribution records, it occurs in the United States.
Sebaga
Sebaga is a genus of ant-loving beetles in the family Staphylinidae, subfamily Pselaphinae, tribe Jubini. It was established by Raffray in 1891. The genus contains a single described species, Sebaga ocampi. These beetles are myrmecophilous, meaning they live in association with ants.
Seirarctia echo
Echo Moth
Seirarctia echo, the Echo Moth, is a monotypic tiger moth species in the family Erebidae. It is endemic to the southeastern United States, where it inhabits thickets, scrublands, and open areas. The species was first described by James Edward Smith in 1797 based on specimens from Georgia.
Selenacentrus
Selenacentrus is a monotypic genus of treehoppers in the family Membracidae, subfamily Centrotinae, described by Morris and Dietrich in 2016. The genus contains a single species, Selenacentrus wallacei, found in Texas and northern Mexico. The genus was named in honor of Selena Quintanilla-Pérez, the "Queen of Tejano Music." Selenacentrus lacks diagnostic features of currently recognized tribes within Centrotinae, including specific male genital capsule structures and femoral setae patterns, and does not fit into existing tribal classifications based on wing venation.
Selenacentrus wallacei
Selenacentrus wallacei is a treehopper species in the family Membracidae, described by Morris and Dietrich in 2016. It represents the sole species of the monotypic genus Selenacentrus. The species was discovered among mislabeled specimens in multiple museum collections and is known from Texas and northern Mexico. Its taxonomic placement required the establishment of a new genus due to unique morphological characteristics that do not align with any recognized tribes within the subfamily Centrotinae.
Selicanis
Selicanis is a genus of moths in the family Noctuidae, established by Smith in 1900. The genus is monotypic, containing only Selicanis cinereola, described from the same publication. It is placed within the subfamily Noctuinae, one of the largest subfamilies of owlet moths. The genus is poorly known, with minimal published information beyond its original description.
Sericoplaga externalis
Falcate Sericoplaga
Sericoplaga externalis is a moth species in the family Crambidae and the sole member of its genus. It is found in eastern and central North America, ranging from Maryland to Illinois and south to Florida and Texas. The species is commonly known as the Falcate Sericoplaga. It has been documented in 1,479 iNaturalist observations, indicating it is moderately well-recorded but not extensively studied.
Shotwellia isleta
Shotwellia isleta is a rare, monotypic band-winged grasshopper described by Gurney in 1940. Molecular phylogenetic analysis places it as sister to other genera within the Chortophaga genus group of Oedipodinae. The species is a habitat specialist restricted to isolated locations in the Chihuahuan Desert.
Souessa spinifera
Souessa spinifera is a sheet web weaving spider and the sole member of the monotypic genus Souessa. First described by O. Pickard-Cambridge in 1874 and later placed in its current genus by Crosby & Bishop in 1936, this small arachnid belongs to the dwarf spider family Linyphiidae. It has been documented only from the United States, with records from multiple states.
Soulgas
Soulgas is a monotypic genus of sheet web spiders (family Linyphiidae) endemic to the United States. It was established in 1936 by C. R. Crosby and S. C. Bishop and contains a single species, Soulgas corticarius. The genus is known from very few observations and remains poorly documented.
Spanglerogyrus albiventris
Spanglerogyrus albiventris is a whirligig beetle in the family Gyrinidae, described in 1979 from specimens collected in southern Alabama. It is the sole extant species in its genus and the only living member of the subfamily Spanglerogyrinae, which represents the earliest diverging lineage among extant gyrinids. The subfamily also includes the extinct genus Angarogyrus from the Jurassic and Cretaceous of Asia.
Sparkia immacula
Sparkia immacula is a noctuid moth and the sole member of its genus. It is found in the southwestern United States, specifically in Arizona and New Mexico. The genus was established by Augustus Radcliffe Grote in 1883. Very little biological information is available for this species.
Spathilepia
Falcate Skipper
Spathilepia is a monotypic genus of skippers in the family Hesperiidae, subfamily Eudaminae. The sole species, Spathilepia clonius, is known as the Falcate Skipper. The genus was established by Arthur Gardiner Butler in 1870. It is distributed from the southern United States through Central America and into South America.
Spathilepia clonius
Falcate Skipper
Spathilepia clonius, commonly known as the Falcate Skipper, is the sole species in the monotypic genus Spathilepia within the skipper family Hesperiidae. This butterfly ranges from the southern United States through Central America and into South America as far as Argentina. It is a member of the subfamily Eudaminae, a group characterized by their robust bodies and rapid, darting flight patterns. The species has been documented across diverse tropical and subtropical habitats.
Sperchopsis
Sperchopsis is a genus of water scavenger beetles in the family Hydrophilidae. The genus was established by LeConte in 1861. It contains a single described species, Sperchopsis tessellata.
Steffanolampus
Steffanolampus is a monotypic genus of chalcidoid wasps established by Peck in 1974 to accommodate Perilampus salicetum Steffan. The single species has a Nearctic distribution, with records from eastern Canada and the United States extending from Quebec to Maryland and Michigan, plus an isolated western population in Washington State. It is associated with anobiid beetles, though the precise nature of this relationship remains unspecified.
Stenelaphus
Stenelaphus is a monotypic genus of longhorn beetles (Cerambycidae) in the tribe Elaphidiini, containing a single species, Stenelaphus alienus. The genus was established by Linsley in 1936. Based on collection records from Arizona, adults have been observed at ultraviolet lights in montane canyon habitats during summer months, suggesting nocturnal activity patterns typical of many cerambycid beetles.
Stenobaris
Stenobaris is a genus of flower weevils in the family Curculionidae, established by Martin L. Linell in 1897. The genus is monotypic, containing only one described species: Stenobaris avicenniae. As a member of Curculionidae, it possesses the characteristic elongated snout (rostrum) typical of weevils. The genus is poorly documented in scientific literature, with limited biological or ecological information available.
Sternidocinus barbarus
Sternidocinus barbarus is a longhorn beetle (Cerambycidae) and the sole species in its genus. It was described by Van Dyke in 1920 based on specimens from western North America. The species belongs to the subfamily Lamiinae, tribe Acanthocinini, a group characterized by often cryptic coloration and nocturnal habits. Its monotypic genus status makes it taxonomically distinctive within the diverse cerambycid fauna of North America.
Strangalepta abbreviata
Strangalepta Flower Longhorn Beetle
Strangalepta abbreviata is a longhorn beetle and the sole member of its genus. It belongs to the flower longhorn subfamily Lepturinae, a group known for visiting flowers as adults. The species is moderately well-documented across eastern and central North America.
Striacosta
western bean cutworm (for sole species S. albicosta)
Striacosta is a monotypic genus of moths in the family Noctuidae, established by Lafontaine in 2004. The sole species, Striacosta albicosta (western bean cutworm), is an agricultural pest native to North America. The species underwent significant range expansion from the western Great Plains to eastern North America beginning in 1999. Larvae are serious pests of corn and dry bean crops, with documented resistance to Cry1F Bt protein.
Superstitionia
Superstitionia is a monotypic genus of scorpions containing the single species S. donensis. It is the only genus in the family Superstitioniidae. Unlike other members of its family, which are cave-adapted and lack pigmentation and lateral eyes, S. donensis is darkly pigmented and possesses lateral eyes. The genus was established in 1940 based on specimens from the Superstition Mountains of Arizona.
Synaphaeta guexi
Spotted Tree Borer
Synaphaeta guexi is a longhorn beetle and the sole species in its genus. It inhabits the Pacific coastal region of North America, from British Columbia to California. The species develops in hardwood trees and is known by the common name Spotted Tree Borer. It was described by John Lawrence LeConte in 1852.
Synnoma lynosyrana
rabbitbrush webbing moth
Synnoma lynosyrana, the rabbitbrush webbing moth, is the sole species in the monotypic genus Synnoma. It belongs to the subfamily Tortricinae of the family Tortricidae. The species is found in western North America, with records from Arizona. Its common name suggests an association with rabbitbrush (Ericameria/Chrysothamnus species).
Tachopteryx
gray petaltail, Thorey's grayback
Tachopteryx is a monotypic genus of dragonflies in the family Petaluridae, containing only Tachopteryx thoreyi. This species is notable for having a non-burrowing larval stage, unlike most other petalurids. Adults are medium-sized dragonflies with distinctive gray and black coloration.
Taniva albolineana
Spruce Needleminer Moth
Taniva albolineana is a monotypic tortricid moth endemic to North America, commonly known as the spruce needleminer moth. The species is specialized on spruce (Picea spp.) as its host plant, with larvae mining within needles. It is the sole member of the genus Taniva. The moth is primarily documented from the Canadian prairie provinces and adjacent regions.
Tapinesthis
Ivy parchment spider
Tapinesthis is a monotypic genus of goblin spiders (family Oonopidae) containing only Tapinesthis inermis, commonly known as the ivy parchment spider. The genus is characterized by its spineless legs, steeply sloping carapace with a dark net-like pattern, and soft body structure. Originally native to Europe, the species has been introduced to North America and shows synanthropic tendencies, frequently inhabiting human dwellings alongside natural habitats. The genus name reflects its distinctive morphological features within the diverse goblin spider family.
Tapinesthis inermis
Tapinesthis inermis is a minute spider species in the family Oonopidae (dwarf goblin spiders). It is the sole member of its genus, which was established by Simon in 1914 based on specimens originally described as Oonops inermis in 1882. The species is native to Europe and has been introduced to North America (Canada and USA).
Tehama
western lawn moth (for sole species Tehama bonifatella)
Tehama is a monotypic genus of moths in the family Crambidae, established by George D. Hulst in 1888. The genus contains a single species, Tehama bonifatella, commonly known as the western lawn moth. This small moth is distributed across northern North America, including Greenland, Canada, and the western United States, where it inhabits grassland ecosystems. The larvae feed on grasses, making it one of the few crambid moths associated with lawn and turf habitats.
Tehama bonifatella
Western Lawn Moth
Tehama bonifatella, the western lawn moth, is a small grass moth in the family Crambidae. It is the sole species in the monotypic genus Tehama. The species is associated with grassland habitats and has been recorded across western and northern North America, including Greenland.
Tethida
Tethida is a genus of sawflies in the family Tenthredinidae, established by Ross in 1937. The genus contains at least one described species, Tethida barda. As a member of the suborder Symphyta, these insects lack the constricted 'wasp waist' characteristic of many other Hymenoptera.
Thricolema
Thricolema is a monotypic genus of leaf beetles in the subfamily Synetinae, containing only Thricolema anomala. Adults are associated with Calocedrus decurrens (incense-cedar) and have been recorded from California and Oregon. The genus is distinguished from the similar Syneta by tarsal claw morphology in females.
Thrinaphe hargeri
Thrinaphe hargeri is a millipede species and the sole member of the genus Thrinaphe, described by Rowland M. Shelley in 1993. The species is endemic to the Cascade Mountains region along the Washington-Oregon border and the Willamette Valley in the Pacific Northwest of the United States. It belongs to the family Xystodesmidae, a diverse group of flat-backed millipedes.
Thurberiphaga diffusa
Thurberiphaga diffusa is the sole species in the monotypic moth genus Thurberiphaga, placed in the family Noctuidae (subfamily Acontiinae, tribe Chamaecleini). The genus was erected by Harrison Gray Dyar Jr. in 1920, with the species originally described by William Barnes in 1904. This noctuid moth is known from North America, though specific details about its biology and host associations remain poorly documented in available literature.
Thylodrias contractus
Odd Beetle, tissue paper beetle
Thylodrias contractus, commonly known as the odd beetle or tissue paper beetle, is the sole species in the monotypic genus Thylodrias within the family Dermestidae. Native to Asia, it has been introduced and become widespread in North America and parts of South America. The species exhibits pronounced sexual dimorphism, with males and females differing substantially in appearance. It is occasionally reported as a pest.
Timpanoga
Timpanoga is a genus of spiny crawler mayflies in the family Ephemerellidae, established by Needham in 1927. The genus contains a single described species, Timpanoga hecuba, commonly known to fly fishermen as the great red quill. This species is significant in angling communities as a model for artificial fly patterns imitating adult and subimago (dun) forms.
Tomolonus reductus
Tomolonus reductus is the sole species in the monotypic genus Tomolonus, a springtail in the family Tomoceridae. It is distinguished from other Tomoceridae by having only three ocelli in its eyepatch, a reduced number compared to relatives. The species was described in 1949 by H.B. Mills. Very few observations exist, with only three records documented on iNaturalist.
Toonglasa
Toonglasa is a genus of true bugs in the family Blissidae, first described by Distant in 1893. The genus contains a single described species, Toonglasa forficuloides. It is classified within the order Hemiptera, suborder Heteroptera, and infraorder Pentatomomorpha. The family Blissidae comprises seed bugs commonly associated with grasses and sedges.
Trabeops aurantiacus
Trabeops aurantiacus is a wolf spider (family Lycosidae) and the sole species in the genus Trabeops. First described by Emerton in 1885 and later placed in its own genus by Roewer in 1959, this spider occurs in the United States and Canada. It represents a monotypic genus within the diverse wolf spider family.
Trichastylopsis albidus
Trichastylopsis albidus is a species of longhorn beetle in the family Cerambycidae, subfamily Lamiinae. It is the sole member of the monotypic genus Trichastylopsis. The species was described by John Lawrence LeConte in 1852. It is known from North America, with records from Mexico and the United States.
Trichinorhipis
Trichinorhipis is a monotypic genus of jewel beetles (Buprestidae) endemic to southern California. The sole species, Trichinorhipis knulli, measures under 4 mm and exhibits distinctive sexual dimorphism in antennae: males possess fan-like (flabellate) antennae adapted for detecting female sex pheromones, while females have unmodified serrate antennae. The genus is placed in its own subtribe (Trichinorphidina) within the tribe Xenorhipidini due to unique morphological characters distinguishing it from related genera Hesperorhipis and Xenorhipis.
Trichinorhipis knulli
Knull's Metallic Wood-boring Beetle
Trichinorhipis knulli is a minute jewel beetle (family Buprestidae) endemic to southern California, where it occurs in Riverside and Imperial Counties. It is the sole member of its monotypic genus, distinguished from related genera by its entire elytra covering the full abdomen and broadly rounded pronotum lacking lateral margins. Males exhibit highly modified flabellate antennae with expanded lamellae bearing numerous olfactory sensillae, an adaptation for detecting female sex pheromones. The species is rarely encountered in the field; most specimens have been reared from dead branches of jojoba (Simmondsia chinensis). At 3.6 mm, it is among the smallest buprestids.
Trichocanonura linearis
Trichocanonura linearis is a species of longhorn beetle in the subfamily Lamiinae, and the sole member of its monotypic genus. It was described by Skinner in 1905 based on specimens from Mexico. The species is characterized by its elongated, linear body form typical of many lamiine cerambycids. It is distributed in Mexico and the southern United States.
Tricholepidion
Tricholepidion
Tricholepidion is a genus of wingless insects in the order Zygentoma, containing a single described species, T. gertschi. It is endemic to the northern coast of California and represents the sole living member of the family Lepidotrichidae, with fossil relatives known from Eocene amber. Its taxonomic position is uncertain; molecular studies have sometimes recovered it as more distantly related to Pterygota than other Zygentoma, which would render Zygentoma paraphyletic. The genus is considered a 'living fossil' due to its isolated phylogenetic position and the extinction of all other family members.
Trimiomelba
Trimiomelba is a genus of myrmecophilous (ant-loving) rove beetles in the family Staphylinidae, subfamily Pselaphinae. The genus was established by Casey in 1897 and contains a single described species, T. dubia. These beetles belong to the tribe Trichonychini, a diverse group of small beetles often associated with ant colonies.
Tristyla alboplagiata
Tristyla alboplagiata is the sole species in the monotypic moth genus Tristyla, family Noctuidae. The species was described by John Bernhardt Smith in 1893. It is restricted to the southwestern United States.
Tropidarnis tectigera
Tropidarnis tectigera is a treehopper species in the family Membracidae, subfamily Smiliinae. It is the sole species in its genus. The species was described by Fowler in 1895. It is known from limited observations in the southwestern United States and parts of Central America.
Tropidolophus formosus
Great Crested Grasshopper
Tropidolophus formosus, the Great Crested Grasshopper, is the sole species in the monotypic genus Tropidolophus. This band-winged grasshopper is native to North America and has been reported in southeastern Wyoming and Colorado. The species is distinguished by a prominent crest on the pronotum, which gives rise to both its scientific and common names. It belongs to the subfamily Oedipodinae, a group characterized by enlarged hind wings often with dark bands.
Trudestra hadeniformis
Trudestra hadeniformis is a moth species in the family Noctuidae, described by Smith in 1894. It is the sole member of the genus Trudestra, which belongs to the tribe Hadenini within the subfamily Noctuinae. The species is known from North America, though detailed biological information remains limited. Its specific epithet 'hadeniformis' suggests resemblance to moths of the related genus Hada (formerly part of Hadenini).
Tsugaea
Tsugaea is a genus of tachinid flies in the family Tachinidae, subfamily Exoristinae, and tribe Eryciini. The genus was established by Hall in 1939 and contains a single described species, Tsugaea nox. These flies are distributed across North America, including Canada, the United States, and Mexico. As tachinid flies, members of this genus are likely parasitoids, though specific host associations remain undocumented in the available literature.
Tylcus
Tylcus is a monotypic genus of longhorn beetles (family Cerambycidae) containing a single species, Tylcus hartwegii. The genus was established by Casey in 1912 and is classified within the tribe Clytini of the subfamily Cerambycinae. As the sole representative of its genus, Tylcus hartwegii serves as the type species and defines the morphological characteristics of this otherwise poorly documented group.
Uhleriola
Uhleriola is a genus of dirt-colored seed bugs in the family Rhyparochromidae, containing a single described species, U. floralis. The genus was established by Horváth in 1908. Members of this genus belong to the diverse assemblage of true bugs commonly referred to as seed bugs or ground bugs.
Uhleriola floralis
Uhleriola floralis is a dirt-colored seed bug in the family Rhyparochromidae, the sole described species in its genus. It is native to North America, with confirmed records from the United States. Like other members of Rhyparochromidae, it belongs to the true bug infraorder Pentatomomorpha and possesses the piercing-sucking mouthparts characteristic of Hemiptera.
Uropodella
Uropodella is a genus of mites in the family Uropodellidae, established by Berlese in 1888. The genus contains a single described species, Uropodella laciniata. These mites belong to the order Mesostigmata, a group of predatory or parasitic mites with diverse ecological roles.
Valenus inornatus
Valenus inornatus is a species of longhorn beetle in the subfamily Lamiinae, and the sole member of its genus. It was described by Thomas L. Casey in 1891. The species is distributed in Mexico and the United States. As the only species in Valenus, it represents a monotypic genus within the tribe Acanthocinini.
Vandykea tuberculata
Serpentine Cypress Long-horned Beetle
Vandykea tuberculata is a species of longhorn beetle (family Cerambycidae) and the sole representative of its genus. It was described by Linsley in 1932 and is known from serpentine cypress habitats in western North America. The species is classified in the subfamily Cerambycinae and tribe Oemini.
Viridemas galena
Viridemas galena is a noctuid moth and the sole species in the monotypic genus Viridemas. First described by John Bernhardt Smith in 1908, this species is endemic to Arizona. The genus and species were established based on specimens collected in the southwestern United States, representing a distinct lineage within the subfamily Noctuinae.
Walterella ocellata
Walterella ocellata is the sole species in the monotypic moth genus Walterella, described by Barnes and McDunnough in 1910. The genus was erected by Harrison Gray Dyar Jr. in 1921. This noctuid moth is known from Arizona, with 35 observations recorded on iNaturalist. As a member of the family Noctuidae, it belongs to one of the largest families of Lepidoptera.
Xenomelanophila
Xenomelanophila is a monotypic genus of jewel beetles (Buprestidae) established by Sloop in 1937. The sole species, X. miranda, exhibits a highly specialized ecological association with forest fires. Females possess infrared-sensing organs that allow detection of smoldering wood for oviposition, making this genus one of the few known examples of pyrophilic beetles with confirmed thermosensory adaptations.
Xenotemna pallorana
Pallid Leafroller Moth
Xenotemna pallorana is a small tortricid moth and the sole member of its genus. It is widely distributed across North America from Alaska and western Canada to Florida and eastern Canada. The species is commonly known as the Pallid Leafroller Moth, reflecting its characteristic pale coloration and the leaf-rolling behavior typical of many tortricid larvae. Adults are active during the growing season, with larvae feeding on various deciduous trees and shrubs.
Xerociris wilsonii
Wilson's Wood-nymph Moth
Xerociris wilsonii, commonly known as Wilson's Wood-nymph Moth, is a monotypic species in the family Noctuidae, subfamily Agaristinae. The genus was erected by Theodore Dru Alison Cockerell in 1904, with the species originally described by Augustus Radcliffe Grote in 1863. It is found in the US state of Texas and has been recorded in North America.
Xyloterinus
Xyloterinus is a monotypic genus of ambrosia beetles in the family Curculionidae, containing the single species Xyloterinus politus. Native to eastern North America, this beetle infests both hardwood and softwood trees, particularly recently fallen or cut timber. The species cultivates fungal gardens in wood galleries and has been extensively studied for its symbiotic relationships with yeasts and other fungi.
Xyloterinus politus
Polished Bark Beetle
Xyloterinus politus is a North American ambrosia beetle in the family Curculionidae, historically placed in Scolytidae. It is the sole species in the monotypic genus Xyloterinus. The species exhibits obligate mutualism with cultivated fungi, excavating galleries in hardwood and softwood trees where it grows and feeds on ambrosial fungi rather than wood tissue. Females initiate gallery construction and maintain fungal gardens; males do not excavate galleries and are excluded from active attacks. The beetle overwinters as an adult in old galleries and cradles.
Xystopeplus
Xystopeplus is a genus of moths in the family Noctuidae, established by Franclemont in 1937. The genus contains a single recognized species, Xystopeplus rufago. These moths belong to the tribe Xylenini within the subfamily Noctuinae. The genus is documented in North American fauna and is represented in natural history collections and citizen science observations.
Zacotus matthewsii
Zacotus matthewsii is a ground beetle and the sole species in its genus. It belongs to the subfamily Broscinae within Carabidae. The species is endemic to western North America, with records from Alaska, Canada, and the contiguous United States. Its monotypic genus status makes it taxonomically distinctive among North American carabids.
Zelicodes linearis
Dusty-winged Tan
Zelicodes linearis is the sole species in the monotypic moth genus Zelicodes, family Erebidae. It was first described by Augustus Radcliffe Grote in 1883 (originally as Litognatha linearis), with the genus established in 1896. The species is known from Arizona, USA, and is commonly called the Dusty-winged Tan. As a member of subfamily Calpinae, it belongs to a group of moths often associated with fruit-feeding behaviors, though specific biological details for this species remain limited.
Zoniagrion exclamationis
Exclamation Damsel
Zoniagrion exclamationis, commonly known as the Exclamation Damsel, is a species of damselfly in the family Coenagrionidae. It is the sole species in its genus and is endemic to western North America. The species was first described by Selys in 1876 and is recognized by its distinctive coloration and patterning. It is a relatively well-documented damselfly with over 300 observations recorded on citizen science platforms.
Zotheca
elder moth
Zotheca is a monotypic genus of moths in the family Noctuidae, containing a single species, Zotheca tranquilla (the elder moth). The genus is restricted to western North America, where adults are active during summer months. The common name derives from the larval host plant, elderberry (Sambucus).
Zygobarinus
Zygobarinus is a genus of flower weevils in the family Curculionidae, established by W.D. Pierce in 1907. The genus contains a single described species, Zygobarinus coelestinus. As a member of the Curculionidae, it possesses the characteristic rostrum (snout) typical of weevils. The genus is classified within the suborder Polyphaga and infraorder Cucujiformia.