United-states
Guides
Norvellina scabra
A small leafhopper in the family Cicadellidae, described from the United States in 1898. Records indicate presence in Iowa. Like other members of genus Norvellina, it possesses piercing-sucking mouthparts for feeding on plant sap. The genus is known for colorful species that can be mistaken for moths due to their small size and patterning.
Nostima niveivenosa
A shore fly species in the family Ephydridae, described by Cresson in 1930. Found in the United States, including Hawaii, and the broader Neotropical region. As with other ephydrid flies, it is associated with moist or aquatic environments.
Nudobius luridipennis
Nudobius luridipennis is a rove beetle in the family Staphylinidae, described by Casey in 1906. It is native to the eastern and southeastern United States, with records spanning from New York to Florida and west to Texas. As a member of the tribe Xantholinini, it belongs to one of the most diverse families of beetles, though specific ecological details for this species remain poorly documented.
Obolopteryx brevihastata
Common Short-wing Katydid
A katydid species in the subfamily Phaneropterinae, distributed across the southwestern United States and northern Mexico. Distinguished from congeners by male genitalic and tegminal characters. The specific epithet refers to the relatively short ovipositor.
Obrium constricticolle
Obrium constricticolle is a species of longhorn beetle (Cerambycidae) described by Schaeffer in 1908. It belongs to the tribe Obriini within the subfamily Cerambycinae. The species is known from the United States and Mexico.
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.
Ocrepeira ectypa
Ocrepeira ectypa is a species of orb-weaving spider in the family Araneidae. It is known from the United States, with 66 documented observations on iNaturalist. The species was first described by Walckenaer in 1841.
Oecleus productus
Oecleus productus is a species of planthopper in the family Cixiidae, described by Metcalf in 1923. It belongs to the tribe Oecleini within the subfamily Cixiinae. Members of this genus are typically associated with grassland and open habitat environments. The species has been recorded from multiple states across the southern and western United States.
Oedopa capito
Oedopa capito is a species of ulidiid fly, commonly known as a picture-winged fly, described by Loew in 1868. It belongs to the genus Oedopa within the family Ulidiidae. The species is part of a group of flies recognized by their patterned wings.
Olethreutes brunneopurpurata
Olethreutes brunneopurpurata is a small tortricid moth in the family Tortricidae, subfamily Olethreutinae. The species was described by Heinrich in 1923. It belongs to a genus of leafroller moths whose larvae typically feed internally within plant tissues. Specific details about the biology and appearance of this particular species remain poorly documented in accessible literature.
Olethreutes electrofuscum
Olethreutes electrofuscum is a small tortricid moth species described by Heinrich in 1923. It belongs to the genus Olethreutes, a diverse group of leafroller moths within the family Tortricidae. The species has been documented from Vermont and other parts of the United States, with 24 observations recorded on iNaturalist. Like other members of its genus, it is likely a small moth with typical tortricid wing posture at rest.
Olethreutes footiana
Olethreutes footiana is a species of tortricid moth in the family Tortricidae, first described by Fernald in 1882. It belongs to the large genus Olethreutes, which contains numerous small moth species commonly known as tortrix moths or leafroller moths. Like other members of its genus, it is likely a small moth with relatively nondescript patterning, though specific details about its biology and ecology remain poorly documented in available literature.
Olethreutes inornatana
Inornate Olethreutes Moth, inornate olethreute
Olethreutes inornatana is a small tortricid moth in the family Tortricidae, commonly known as the Inornate Olethreutes Moth. It is distributed across northern North America, with records from Canada (Alberta, Manitoba, Saskatchewan) and the United States (Vermont). The species belongs to the subfamily Olethreutinae, a group of small moths often referred to as tortrix moths or leafroller moths. The MONA or Hodges number for this species is 2788.
Olethreutes malana
Malana Leafroller Moth
Olethreutes malana is a species of tortricid moth commonly known as the Malana Leafroller Moth. First described by Fernald in 1882, it belongs to the diverse leafroller moth genus Olethreutes within the family Tortricidae. The species has been documented in the northeastern United States, particularly Vermont. As with many Olethreutes species, it is likely associated with woody host plants, though specific biological details remain poorly documented in available sources.
Olethreutes nitidana
Olethreutes nitidana is a species of tortricid moth described by Clemens in 1860. It belongs to the large genus Olethreutes, which contains numerous small moth species commonly known as leafroller moths. The species has been documented in the northeastern United States, with records from Vermont. Like other members of its genus, it is likely a small moth with relatively nondescript coloration, though specific diagnostic features for this species are not well documented in available sources.
Olethreutes punctanum
Olethreutes punctanum is a species of tortricid moth described by Walsingham in 1903. As a member of the Olethreutinae subfamily, it belongs to a group commonly known as leafroller moths. The genus Olethreutes contains numerous species, many of which are small to medium-sized moths with distinctive wing patterns. Specific details about the biology and ecology of O. punctanum remain limited in published literature.
Omalorphanus aenigma
Omalorphanus aenigma is a species of rove beetle in the family Staphylinidae, described by Campbell and Chandler in 1987. It belongs to the subfamily Omaliinae and tribe Anthophagini. The species is known from the Pacific Northwest region of the United States, with records from Oregon.
Omophron nitidum
Shiny Round Sand Beetle
Omophron nitidum is a small ground beetle native to the United States. Adults are nocturnal, sheltering in burrows and leaf litter during daylight hours. The species has been recorded breeding from late summer through December. It is one of several North American species in the genus Omophron, which are adapted to sandy habitats.
Oncideres pustulata
Coastal Huisache Girdler
Oncideres pustulata is a species of longhorn beetle in the family Cerambycidae, described by John Lawrence LeConte in 1854. It is distributed across Mexico and the southern United States. The species is a twig girdler, with larvae that develop within girdled branches of host plants in the genera Leucaena and Prosopis. It is known to feed on Leucaena leucocephala, Leucaena pulverulenta, Prosopis alba, and Prosopis chilensis.
Onthophagus browni
Onthophagus browni is a species of dung beetle in the family Scarabaeidae, first described by Howden and Cartwright in 1963. It belongs to the large and diverse genus Onthophagus, which contains over 2,000 species worldwide. Like other members of its genus, this species is associated with mammal dung, playing a role in nutrient cycling. The species is distributed across parts of the southwestern United States and northern Mexico.
Onthophagus cavernicollis
Cave-dwelling Dung Beetle
Onthophagus cavernicollis is a dung beetle species in the family Scarabaeidae, first described by Howden and Cartwright in 1963. The species epithet "cavernicollis" suggests a possible association with cave or subterranean habitats, though specific ecological details remain limited. Like other members of the genus Onthophagus, it is presumed to be a dung-feeding beetle involved in nutrient recycling. The species has been documented in the south-central United States.
Onthophagus knausi
Onthophagus knausi is a dung beetle species in the family Scarabaeidae, first described by Brown in 1927. It belongs to the large genus Onthophagus, which contains numerous species known for their role in dung decomposition and distinctive male horn polymorphisms. The species is recorded from the central United States, with distribution records from Illinois, Iowa, Kansas, Nebraska, and Texas.
Onthophagus oklahomensis
Onthophagus oklahomensis is a species of dung beetle in the family Scarabaeidae, first described by Brown in 1927. It belongs to the genus Onthophagus, a large and diverse group of tunneler dung beetles known for their ecological role in nutrient recycling. The species is documented from the southeastern and south-central United States, with records extending from Oklahoma eastward to the Atlantic coast. Like other members of its genus, it is presumed to be associated with mammal dung, though specific ecological studies on this species are limited.
Onthophilus kirni
clown beetle
Onthophilus kirni is a species of clown beetle in the family Histeridae, first described by Ross in 1944. It belongs to the genus Onthophilus, a group of small histerid beetles. The species is documented from several states in the southern and central United States. Like other members of its family, it is likely predatory, though specific ecological details remain limited.
Onthophilus wenzeli
clown beetle
Onthophilus wenzeli is a species of clown beetle in the family Histeridae, described by Helava in 1978. The species is known from the central United States, with records from Iowa, Illinois, and Nebraska. Like other members of the genus Onthophilus, it is associated with dung and decaying organic matter. The specific epithet honors an individual with the surname Wenzel.
Ophiderma panda
Ophiderma panda is a treehopper species in the family Membracidae, described by Ball in 1932. The species is native to the southwestern United States, with confirmed records from Arizona. Like other members of the genus Ophiderma, it possesses a distinctive enlarged pronotum that extends over the body. The specific epithet "panda" likely refers to coloration patterns, though detailed descriptions of its appearance remain limited in available literature.
Ophiogomphus incurvatus
Appalachian snaketail
Ophiogomphus incurvatus, commonly known as the Appalachian snaketail, is a dragonfly species in the family Gomphidae. It is endemic to the United States. The species inhabits intermittent rivers and is one of several snaketail dragonflies in the genus Ophiogomphus.
Orconectes
Orconectes is a genus of cave-dwelling freshwater crayfish endemic to the eastern United States. The genus was erected in 1872 by Edward Drinker Cope and originally contained 85 species in 11 subgenera. Following a 2017 taxonomic review, most surface-dwelling species were transferred to the genus Faxonius, leaving approximately 8 obligate cave-dwelling species in Orconectes. These subterranean crayfish exhibit classic troglomorphic traits including depigmentation, reduced eyes or blindness, and elongated appendages. Some species are extremely long-lived, though earlier claims of 176-year lifespans for O. australis were revised to 22 years or less in a 2012 study.
Osbornellus parallelus
Osbornellus parallelus is a species of leafhopper in the family Cicadellidae, described by DeLong & Knull in 1941. It belongs to the tribe Scaphoideini within the subfamily Deltocephalinae. Leafhoppers in this genus are small, plant-feeding insects with piercing-sucking mouthparts. The specific epithet 'parallelus' likely refers to some aspect of the species' morphology, such as parallel wing veins or body markings.
Osbornellus rotundus
Osbornellus rotundus is a species of leafhopper in the family Cicadellidae, first described by Beamer in 1937. It belongs to the tribe Scaphoideini within the subfamily Deltocephalinae. The species has been recorded from multiple states in the eastern United States.
Oscarinus brimleyi
Oscarinus brimleyi is a dung beetle species in the family Scarabaeidae, subfamily Aphodiinae. It has been documented in the southeastern United States, specifically in North Carolina, South Carolina, and Texas. As a member of the genus Oscarinus, it is likely associated with mammal dung, though specific ecological details for this species remain limited in published literature. The species was described by Cartwright in 1939.
Oscarinus matiganae
A dung beetle species in the family Scarabaeidae, described by Paulsen in 2006. It belongs to the genus Oscarinus, which comprises beetles associated with vertebrate dung. The species has been recorded from Nebraska and Texas in the United States.
Otiocerus abbotii
Otiocerus abbotii is a species of planthopper in the family Derbidae, first described by Kirby in 1821. It belongs to a group of insects commonly attracted to blacklights during nocturnal surveys. The species is part of a genus whose members are often found in association with woody vegetation. Like other derbid planthoppers, it possesses the characteristic elongated body form and wings held roof-like over the body at rest.
Oxycrepis erratica
Oxycrepis erratica is a species of ground beetle in the family Carabidae. It is found in the United States.
Oxycrepis intercepta
Oxycrepis intercepta is a species of ground beetle in the family Carabidae. It occurs in North America, with records from Mexico and the United States. As a member of the tribe Harpalini, it belongs to a diverse group of predominantly ground-dwelling beetles. Published information on its biology and ecology remains limited.
Oxycrepis saphyrina
Oxycrepis saphyrina is a species of ground beetle in the family Carabidae, tribe Lebiini. It was described by Chaudoir in 1843. Records indicate occurrence in the United States, though detailed biological information remains limited. The genus Oxycrepis comprises small to medium-sized carabid beetles, many of which inhabit forest floor habitats.
Oxyopes acleistus
Oxyopes acleistus is a species of lynx spider in the family Oxyopidae, first described by Chamberlin in 1929. It is found in the United States and Mexico. As a member of the lynx spider genus Oxyopes, it likely shares the family's characteristic hunting behavior, though specific details for this species remain poorly documented.
Oxyopes aglossus
Oxyopes aglossus is a species of lynx spider in the family Oxyopidae, first described by Chamberlin in 1929. As a member of the Oxyopidae, it possesses the characteristic long spiny legs and hunting behavior typical of lynx spiders. The species is documented from the United States, though specific details about its biology and ecology remain limited in available sources.
Ozotomerus japonicus
Japanese Fungus Weevil
Ozotomerus japonicus is a species of fungus weevil in the family Anthribidae, described by Sharp in 1891. The species is native to Japan and has been introduced to the contiguous United States, where it is established. As a member of the Anthribidae family, it is associated with fungal associations typical of this group of weevils. The species has been documented through iNaturalist observations and is listed in major taxonomic databases including GBIF and the Catalogue of Life.
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.
Palaminus testaceus
Palaminus testaceus is a rove beetle (family Staphylinidae) described by Erichson in 1840. It belongs to the subfamily Paederinae, a diverse group of rove beetles often associated with decaying organic matter and moist habitats. The species is recorded from multiple states across the eastern and central United States.
Palpita freemanalis
Freeman's Palpita Moth
Palpita freemanalis is a small crambid moth in the subfamily Spilomelinae, described by Eugene G. Munroe in 1952. It occurs across the southeastern and central United States, with adults active primarily during late summer. The species is characterized by its modest size and relatively broad geographic distribution within its range.
Pammene medioalbana
Pammene medioalbana is a species of tortrix moth in the family Tortricidae, described by Knudson in 1986. It belongs to the genus Pammene, a group of small moths commonly known as fruitworm moths. The species is part of the subfamily Olethreutinae, which includes many economically significant agricultural pests. Limited published information exists regarding its specific biology and ecology.
Pangaeus
burrower bugs
Pangaeus is a genus of burrower bugs in the family Cydnidae (Hemiptera), comprising approximately 14 described species. Members are fossorial insects adapted for subterranean life, with species distributed across the Americas. The genus includes significant agricultural pests, most notably P. bilineatus, which damages peanut crops in the southeastern United States. Species exhibit morphological adaptations for burrowing, including stout, spiny forelegs.
Panscopus alternatus
A weevil species in the family Curculionidae, described by Schaeffer in 1908. Records indicate presence in the southeastern United States. The genus Panscopus belongs to the tribe Byrsopagini within the subfamily Entiminae.
Paracosmus morrisoni
Paracosmus morrisoni is a species of bee fly in the family Bombyliidae, subfamily Tomomyzinae. It was described by Osten Sacken in 1887. The species occurs in the southwestern United States and Mexico, representing part of the diverse bee fly fauna of arid and semi-arid regions of North America.
Paradidyma conica
Paradidyma conica is a species of bristle fly in the family Tachinidae, first described by Townsend in 1891. It belongs to the tribe Minthoini within the subfamily Tachininae. The species is known from North America, with records from the United States. As a tachinid fly, it is presumed to be a parasitoid, though specific host associations for this species have not been documented in the available literature.
Paralobesia spiraeifoliana
Paralobesia spiraeifoliana is a species of tortricid moth described by Heinrich in 1923. It belongs to the genus Paralobesia, which includes several species associated with host plants. The species is recorded from the northeastern United States, with documented occurrences in Vermont. Like other members of the family Tortricidae, it is a small moth with characteristic wing posture at rest.
Parantonae arida
Parantonae arida is a species of treehopper in the family Membracidae, described by Flock & Gill in 1987. It belongs to the tribe Ceresini within the subfamily Smiliinae. The species is part of a genus whose members are characterized by distinctive pronotal modifications. Very little specific biological information has been published for this particular species.