Monotypic
Guides
Eumichthus
Eumichthus is a monotypic genus of longhorn beetles in the family Cerambycidae, established by John Lawrence LeConte in 1873. It contains a single species, Eumichthus oedipus, also described by LeConte in the same year. The genus belongs to the tribe Eumichthini, which was erected to accommodate this distinctive taxon. The species is restricted to western North America.
Euprora
Euprora is a monotypic moth genus in the family Tineidae, established by Busck in 1906. The genus contains a single species, Euprora argentiliniella, found in the southern United States. Adults are small moths with distinctive silvery-white markings on golden ochreous forewings.
Eurhinosea
Eurhinosea is a monotypic moth genus in the family Geometridae, established by Packard in 1873. It contains a single species, Eurhinosea flavaria, which occurs in western North America. The genus belongs to the subfamily Larentiinae, a diverse group of geometrid moths often associated with cooler or montane habitats.
Eurythmidia
Eurythmidia is a monotypic genus of snout moths in the family Pyralidae, subfamily Phycitinae. It was established by George Hampson in 1901. The genus contains a single species, Eurythmidia ignidorsella, described by Émile Louis Ragonot in 1887. Records indicate presence in the southwestern United States and Central America.
Euvacusus
Euvacusus is a genus of antlike flower beetles in the family Anthicidae. It was established by Casey in 1904. The genus contains a single described species, Euvacusus coloradanus. Members of this genus are small beetles with an ant-like appearance, a characteristic feature of the Anthicidae family.
Evita
Evita is a monotypic genus of moths in the family Geometridae, described by Capps in 1943. It belongs to the subfamily Ennominae, one of the largest subfamilies of geometer moths. The genus is known from very few observations, with only two records documented on iNaturalist.
Fotella
Fotella is a monotypic moth genus in the family Noctuidae, containing the single species Fotella notalis. The genus was established by Augustus Radcliffe Grote in 1882. It is restricted to arid regions of the southwestern United States.
Fumibotys
mint root borer moth
Fumibotys is a monotypic genus of crambid moths containing a single species, Fumibotys fumalis. The genus was established by Eugene G. Munroe in 1976 to accommodate this species, which was originally described by Achille Guenée in 1854. The common name "mint root borer moth" refers to the larval habit of boring into mint roots. The genus is distributed across most of North America.
Galacticoidea
Galacticoid Moths
Galacticoidea is a monotypic superfamily of Lepidoptera containing the single family Galacticidae. These moths were historically classified within several different superfamilies before molecular and morphological studies established their distinct placement at the base of Apoditrysia, a major clade of Lepidoptera. The superfamily remains poorly studied, with limited ecological and biological data available.
Gehringia
Gehringia is a monotypic genus of ground beetles in the family Carabidae, containing the single species Gehringia olympica. The genus was established by Philip Jackson Darlington, Jr. in 1933, named in honor of physician John George Gehring. Its sole species is a tiny, shiny-black beetle with distinctive stout bristles, restricted to the Pacific Northwest of North America.
Geocolus
Geocolus is a monotypic genus of clown beetles (family Histeridae) containing a single described species, G. caecus. The genus is notable for its highly specialized subterranean ecology. The sole species exhibits extreme morphological adaptations for underground life, including near-complete eye reduction and depigmentation.
Geopinus
Geopinus is a monotypic genus of ground beetles (family Carabidae) containing only the species Geopinus incrassatus. The genus is classified within the tribe Anisodactylini. The single known species has been documented feeding on seedlings in agricultural seed beds.
Gertschanapis
Gertschanapis is a genus of minute araneomorph spiders in the family Anapidae. The genus contains a single species, Gertschanapis shantzi, described by Norman I. Platnick and Raymond Robert Forster in 1990. It is known only from the United States.
Geshna
lesser canna leafroller
Geshna is a monotypic moth genus in the family Crambidae, established by Harrison Gray Dyar Jr. in 1906. The genus contains a single species, Geshna cannalis (Quaintance, 1898), commonly known as the lesser canna leafroller. This small moth has a wingspan of 20–25 mm and exhibits a multivoltine flight pattern with adults active during three distinct periods throughout the year. The genus is distributed across the southeastern United States and extends into Central America and the Caribbean.
Glaucodontia
Glaucodontia is a monotypic genus of moths in the family Crambidae, established by Munroe in 1972. The genus contains a single species, Glaucodontia pyraustoides, known from the southwestern United States. The genus is classified within the subfamily Odontiinae.
Glyphocystis
Glyphocystis is a monotypic genus of snout moths (Pyralidae) described by André Blanchard in 1973. The genus contains a single species, Glyphocystis viridivallis, which is endemic to Texas. Adults are small moths with a wingspan of 21–24 mm.
Gnamptopelta
Gnamptopelta is a monotypic genus of ichneumonid wasps containing the single species G. obsidianator. The genus is distinguished by a uniquely concave clypeus, reflected in its etymology from Greek roots meaning 'bent shield.' These are large, predominantly black wasps found across eastern North America, where they function as specialist parasitoids of sphinx moth caterpillars feeding on grapevines.
Gnathonaroides
Gnathonaroides is a monotypic genus of sheet-web weaving spiders (family Linyphiidae) containing the single species Gnathonaroides pedalis. It was described in 1938 by arachnologists S. C. Bishop and C. R. Crosby. The genus is known only from Canada and the United States, with extremely limited observational records.
Gnorimella
maculate flower scarab
Gnorimella is a monotypic genus of scarab beetles in the family Scarabaeidae, containing the single species Gnorimella maculosa. This uncommon beetle is notable for its spotted patterning and association with deciduous woodland habitats in eastern North America. The genus was established by Casey in 1915 and remains one of the more rarely encountered cetoniine scarabs in its range.
Gnorimella maculosa
Maculated Scarab
Gnorimella maculosa is a monotypic scarab beetle and the sole representative of its genus. It is characterized by spotted elytral patterning that gives the species its name. The beetle is associated with deciduous woodland habitats in eastern North America. It is considered uncommon in collections and field observations.
Gnostus
Gnostus is a monotypic genus of spider beetles in the family Ptinidae, containing a single described species, G. floridanus. The genus was established by Westwood in 1855. As a member of Ptinidae, it belongs to a group of beetles commonly associated with stored products and dry organic materials.
Goniops
Goniops is a monotypic genus of horse flies in the family Tabanidae, containing the single species Goniops chrysocoma. The genus was established by Aldrich in 1892 and is classified in the subfamily Pangoniinae and tribe Goniopsini. It is endemic to North America.
Grypotes
Grypotes is a monotypic genus of leafhoppers in the family Cicadellidae, established by Fieber in 1866. The genus contains a single species, Grypotes puncticollis (Herrich-Schäffer, 1834), distributed across the Palaearctic region. Records from Kazakhstan mark the eastern margin of its range. The genus belongs to the subfamily Deltocephalinae, tribe Athysanini, and subtribe Koebeliina.
Gyrocheilus
Gyrocheilus is a monotypic butterfly genus in the family Nymphalidae, containing only the species Gyrocheilus patrobas, commonly known as the red-bordered brown. The genus is restricted to mountainous regions of the southwestern United States and Mexico. It belongs to the subfamily Satyrinae, a group often associated with forested habitats and shade-tolerant behavior.
Hadenella
Hadenella is a monotypic genus of noctuid moths established by Grote in 1883. The sole species, Hadenella pergentilis, occurs in western North American sage steppe habitats from the Pacific Northwest and Alberta south through the Rocky Mountains to Utah and Colorado, and along the Pacific Coast to southern California.
Haematopis
Chickweed Geometer
Haematopis is a monotypic moth genus in the family Geometridae, containing the single species Haematopis grataria, commonly known as the chickweed geometer. This small, day-flying moth is widespread across North America, recognized by its pale yellow wings marked with distinctive pink or red bands and spots. The genus was erected by Jacob Hübner in 1823, with the species described by Johan Christian Fabricius in the same year.
Hakka
Hakka is a monotypic genus of jumping spiders (family Salticidae) established by Berry & Prószyński in 2001. The genus contains a single species, Hakka himeshimensis, native to East Asia with introduced populations in the United States. These spiders inhabit rocky coastal environments and possess the characteristic visual acuity and saltatory locomotion typical of salticids.
Halesochila
Halesochila is a monotypic genus of northern caddisflies in the family Limnephilidae, containing the single described species H. taylori. The genus was established by Banks in 1907. As a member of Limnephilidae, it belongs to a diverse family of case-making caddisflies commonly found in freshwater habitats.
Hamotina
Hamotina is a genus of tortrix moths in the family Tortricidae, tribe Archipini. The genus contains a single described species, Hamotina eductana (Walker, 1863). These moths are distributed in parts of Asia. Like other Archipini, they are small to medium-sized moths with characteristic wing patterns.
Hebestola
Hebestola is a monotypic genus of longhorn beetles (Cerambycidae) in the subfamily Lamiinae, tribe Monochamini. The genus contains a single species, Hebestola nebulosa, described by Haldeman in 1847. The genus was established by Chevrolat in 1845. As a member of the Monochamini, it belongs to a tribe known for species associated with coniferous hosts.
Heliaula
Rufous Grasshopper
Heliaula is a monotypic genus of slant-faced grasshoppers in the family Acrididae, established by Caudell in 1916. The sole described species, Heliaula rufa (Scudder), occurs in shortgrass prairie habitats of the western United States. The genus is classified in the subfamily Gomphocerinae and tribe Cibolacrini.
Hemiglyptus
Hemiglyptus is a genus of flea beetles (Chrysomelidae) established by Horn in 1889. The genus currently contains a single recognized species, Hemiglyptus basalis, following the transfer of four Chilean species to the genus Psilapha. The sole remaining species is known from the Nearctic region.
Hemigrotella
Hemigrotella is a monotypic moth genus in the family Noctuidae, containing the single species Hemigrotella argenteostriata. The genus was described in 1918 by William Barnes and James Halliday McDunnough. It is endemic to southern California. The genus belongs to the tribe Psaphidini within the subfamily Amphipyrinae.
Heminocloa
Heminocloa is a monotypic genus of owlet moths (Noctuidae) established by Barnes and Benjamin in 1924. It contains a single species, Heminocloa mirabilis, first described by Neumoegen in 1884. The genus is restricted to Arizona, United States.
Henryana
Henryana is a monotypic genus of chalcidoid wasps in the family Eulophidae, subfamily Tetrastichinae. The genus was described by Yoshimoto in 1983 and is distributed in the Nearctic and Neotropical regions. As a monotypic genus, it contains a single described species. Members of this genus are parasitoid wasps, though specific host associations remain poorly documented.
Hesperobaris
Hesperobaris is a genus of flower weevils in the family Curculionidae, established by Thomas Lincoln Casey in 1892. The genus currently contains a single described species, Hesperobaris suavis, found in North America. As flower weevils, members of this genus are associated with floral resources, though specific biological details remain poorly documented due to the genus's rarity and limited study.
Hesperocosa
Hesperocosa is a monotypic genus of wolf spiders (family Lycosidae) established in 1937. It contains a single species, Hesperocosa unica, known only from the United States. The genus is poorly studied, with limited published information on its biology and ecology.
Hesperocranum
Hesperocranum is a monotypic genus of spiders in the family Liocranidae. It was established in 1991 by arachnologists Darrell Ubick and Norman Platnick. The genus contains a single species, Hesperocranum rothi, known from the United States. Very little is known about its biology or ecology.
Heteropacha
Riley's lappet moth
Heteropacha is a monotypic moth genus in the family Lasiocampidae, containing only the species Heteropacha rileyana (Riley's lappet moth). The genus was established by Leon F. Harvey in 1874. The single species is restricted to the southeastern United States.
Hexepeolini
Hexepeolini is a monotypic tribe of cuckoo bees within the subfamily Nomadinae (family Apidae). The tribe contains a single genus, Hexepeolus, which in turn contains only one species, Hexepeolus rhodogyne. As cuckoo bees, members of this tribe are brood parasites that do not construct nests or collect pollen. The extreme rarity of this tribe—represented by only two observations on iNaturalist—reflects its narrow geographic distribution and specialized ecological requirements.
Hexepeolus
Hexepeolus is a monotypic genus of cuckoo bees in the family Apidae, established by Linsley and Michener in 1937. It represents the sole genus within the tribe Hexepeolini and contains only one described species, Hexepeolus rhodogyne. As a member of the subfamily Nomadinae, these bees exhibit kleptoparasitic behavior, laying eggs in the nests of other bee species. The genus is rarely encountered, with minimal observational records.
Holopleurini
Holopleurini is a monotypic tribe of longhorn beetles (Cerambycidae) containing a single genus, Holopleura, and a single species, Holopleura marginata. The tribe is classified within the subfamily Cerambycinae. Information on this group is extremely limited due to its rarity and restricted distribution. The species appears to be endemic to a narrow geographic range in western North America.
Homocerynea
Homocerynea is a monotypic moth genus in the family Erebidae, established in 1913 by William Barnes and James Halliday McDunnough. It contains a single species, Homocerynea cleoriformis, known only from Arizona. The genus has been classified in various subfamilies, including Phytometrinae within Erebidae and Acontiinae within Noctuidae, reflecting taxonomic uncertainty.
Homolagoa
Homolagoa is a monotypic genus of owlet moths in the family Noctuidae, containing the single species Homolagoa grotelliformis. The genus was established by William Barnes and James Halliday McDunnough in 1912. The sole species is known from North America and has been assigned MONA/Hodges number 9043.
Hormoschista
double-lined brown moth
Hormoschista is a monotypic moth genus in the family Erebidae, established by Heinrich Benno Möschler in 1890. It contains a single species, Hormoschista latipalpis, commonly known as the double-lined brown moth. The genus has undergone taxonomic revision, previously placed in Noctuidae (subfamily Acontiinae) or Phytometrinae within Erebidae.
Hubbellia
Hubbellia is a monotypic genus of shield-backed katydids in the family Tettigoniidae, established by Hebard in 1927. The sole described species, H. marginifera, is among the rarest katydids in the United States, with approximately 40 specimens collected despite over a century of entomological work. Its extreme rarity and arboreal habits have made it a notable subject for orthopteran researchers.
Hypaurotis
Hypaurotis is a monotypic genus of hairstreak butterflies in the family Lycaenidae. The sole species, Hypaurotis crysalus (Colorado Hairstreak), is endemic to montane oak scrublands of the southwestern United States and adjacent northern Mexico. The genus was erected by Scudder in 1876 based on specimens from Colorado.
Hypopacha
Hypopacha is a monotypic moth genus in the family Lasiocampidae, erected by Berthold Neumoegen and Harrison Gray Dyar Jr. in 1893. The genus contains a single species, Hypopacha grisea, described by Neumoegen in 1882. It is native to the southwestern United States.
Ianius
Ianius is a monotypic moth genus in the family Erebidae, established by Richards in 1939. It contains a single species, Ianius mosca, originally described by Dyar in 1910. The genus occurs in Mexico and the southern United States, with records from Texas. Adults are active in spring and early autumn.
Icosium
Icosium is a monotypic genus of longhorn beetles (Cerambycidae: Cerambycinae) established by Lucas in 1854, containing the single species Icosium tomentosum. The genus is notable for the unique acoustic behavior of its larvae, which produce substrate-borne vibrations audible to humans through mandible scraping against bark. This represents the first documented case of chorusing behavior in Cerambycidae larvae.