Monotypic-genus
Guides
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.