Rarely-observed
Guides
Ceuthophilus chiricahuae
Chiricahua cave cricket
Ceuthophilus chiricahuae is a species of camel cricket (family Rhaphidophoridae) endemic to North America. The species was described by Hubbell in 1936 and is named for the Chiricahua Mountains region. Like other members of the genus Ceuthophilus, it is wingless and adapted to cool, dark, moist habitats. Very few observations of this species have been recorded, with only six documented occurrences in biodiversity databases.
Chaetarthria nigrella
Chaetarthria nigrella is a minute water scavenger beetle in the family Hydrophilidae. It is one of the smallest members of its family, typically measuring only 1-2 millimeters in length. The species belongs to the subfamily Chaetarthriinae, a group of tiny beetles often associated with moist or aquatic microhabitats. Very few observations exist for this species, with only three records documented on iNaturalist, suggesting it is either genuinely rare, undercollected, or difficult to detect due to its minute size.
Charlesella viticola
Charlesella viticola is a species of longhorn beetle in the family Cerambycidae, subfamily Lamiinae. It was described by Schaeffer in 1908. The species belongs to the tribe Desmiphorini, a group of relatively small to medium-sized cerambycids often associated with woody plants. Very few observations of this species have been documented, with only three records in iNaturalist as of the knowledge cutoff.
Chersodromia insignita
Chersodromia insignita is a species of hybotid dance fly described by Melander in 1945. It belongs to the family Hybotidae, a group of predatory flies commonly known as dance flies. The species is known only from California, with very few documented observations.
Chionodes rectifex
Chionodes rectifex is a species of gelechiid moth described by Hodges in 1999. It is known from the southeastern United States, with records from North Carolina to Florida. The species is represented by few observations, suggesting it may be uncommon or underrecorded.
Chionomus quadrispinosus
Chionomus quadrispinosus is a species of planthopper in the family Delphacidae, originally described by Muir and Giffard in 1924. As a member of the genus Chionomus, it belongs to a group of small delphacid planthoppers associated with grassland habitats. The species epithet 'quadrispinosus' refers to four spines, likely describing a diagnostic feature of the male genitalia or other sclerotized structures. Very few observations exist in public databases, suggesting it is either genuinely rare, cryptic, or underreported.
Chramesus chapuisii
Chramesus chapuisii is a species of weevil in the family Curculionidae, described by LeConte in 1876. The genus Chramesus comprises bark beetles, a group of small weevils that tunnel beneath tree bark. This species is known from very few documented observations, with only two records on iNaturalist. Most species in this genus are associated with coniferous trees.
Chrysops clavicornis
deer fly
Chrysops clavicornis is a species of deer fly in the family Tabanidae, described by Brennan in 1935. It belongs to the genus Chrysops, a diverse group of biting flies commonly known as deer flies or yellow flies. The species is characterized by clubbed antennae, as indicated by its specific epithet 'clavicornis' (from Latin clavus = club, cornu = horn). Like other members of the genus, it is likely a blood-feeding fly with females requiring blood meals for egg development.
Cimberis pallipennis
Pale-winged Pine Flower Weevil
Cimberis pallipennis is a species of primitive weevil in the family Nemonychidae, commonly known as the Pale-winged Pine Flower Weevil. The species was described by Blatchley in 1916 and is currently placed in the genus Cimberis, though it was previously classified under Rhinomacer. It belongs to a small family of weevils characterized by their association with coniferous plants.
Cligenes
Cligenes is a genus of dirt-colored seed bugs in the family Rhyparochromidae, established by Distant in 1893. The genus contains at least two described species: Cligenes distinctus (Distant, 1893) and Cligenes grandis (Brambila, 2000). Members belong to the tribe Antillocorini within the subfamily Rhyparochrominae. The genus is rarely encountered, with only two observations recorded on iNaturalist.
Clivina pallida
Pale Slope-rumped Beetle
Clivina pallida is a species of ground beetle in the subfamily Scaritinae, described by Thomas Say in 1823. It belongs to the genus Clivina, a group of small, fossorial carabid beetles commonly known as ant-like stone beetles or slope-rumped beetles. The species epithet "pallida" refers to its pale coloration. Very little specific biological information is documented for this particular species.
Colaspis brownsvillensis
Brownsville milkvine leaf beetle, Texas Milkvine Colaspis
Colaspis brownsvillensis is a leaf beetle in the family Chrysomelidae, first described by Doris Holmes Blake in 1975 (published 1976) from specimens collected in Brownsville, Texas. The species is endemic to Texas and is closely related to Colaspis nigrocyanea. It is commonly known as the Brownsville milkvine leaf beetle or Texas Milkvine Colaspis. Very few observations of this species have been recorded, with only 20 documented observations in iNaturalist.
Colaspis suggona
Colaspis suggona is a leaf beetle species described by Blake in 1977. It belongs to the family Chrysomelidae and is known to occur in North America. Very little specific information is documented about this species, and it appears to be rarely observed or studied.
Colobostema varicorne
minute black scavenger fly, dung midge
Colobostema varicorne is a species of minute black scavenger fly in the family Scatopsidae, commonly referred to as a dung midge. It was described by Coquillett in 1902. Members of this family are small, dark-colored flies associated with decomposing organic matter. The species is rarely documented, with few observations recorded.
Compsobata mima
Compsobata mima is a species of stilt-legged fly in the family Micropezidae. It was originally described as Trepidaria mima by Hennig in 1936 before being transferred to the genus Compsobata. The species is known from limited observations, with only two records documented on iNaturalist. As a member of the Micropezidae, it belongs to a family characterized by elongated legs and distinctive wing-raising behavior.
Condylops obrieni
Condylops obrieni is a species of soft-winged flower beetle in the family Melyridae, described by Wittmer. It belongs to the subgenus Neocondylops. The species is known from very limited observations, with only one documented occurrence on iNaturalist. As a member of Melyridae, it likely shares general ecological tendencies with related species in the genus, though specific biological details remain poorly documented.
Conoecus
Conoecus is a genus of darkling beetles (family Tenebrionidae) described by Horn in 1885. The genus is native to the Nearctic region, though it is rarely encountered with very few documented observations. As a tenebrionid genus, its members are likely adapted to arid or semi-arid environments, though specific ecological details remain poorly documented.
Copablepharon atrinotum
Copablepharon atrinotum is a moth species in the family Noctuidae, described by Crabo and Lafontaine in 2004. The species belongs to a genus of sand-dwelling moths primarily distributed in North America. Very few observations of this species have been recorded, with only two documented observations on iNaturalist.
Cophura sculleni
Cophura sculleni is a species of robber fly (Asilidae) described by Wilcox in 1937. It belongs to the subfamily Brachyrhopalinae, a group characterized by relatively short antennae. The species is part of the genus Cophura, which contains approximately 30 species distributed primarily in North America. Very few observations of this species have been documented.
Cordyla manca
Cordyla manca is a species of fungus gnat in the family Mycetophilidae, first described by Johannsen in 1912. It belongs to the subfamily Mycetophilinae and tribe Exechiini. Like other members of its genus, it is presumed to be associated with fungal habitats, though specific ecological details remain poorly documented. The species is known from very few observations.
Corymbitodes xanthomus
Corymbitodes xanthomus is a species of click beetle in the family Elateridae. It is a rarely encountered species with limited documentation, known from a small number of observations. As with other members of the genus Corymbitodes, it belongs to a group of click beetles characterized by their ability to produce a clicking sound through a prosternal process that snaps against the mesosternum when disturbed.
Craterocercus obtusus
Craterocercus obtusus is a species of sawfly in the family Tenthredinidae, first described by Klug in 1816. It belongs to a genus within a family commonly known as common sawflies, which are herbivorous Hymenoptera with larvae that feed on plant material. The species has minimal documented observations, with only two records on iNaturalist. Beyond taxonomic classification, detailed biological information about this specific species appears to be scarce in accessible literature.
Cratichneumon arizonensis
Cratichneumon arizonensis is a species of ichneumon wasp in the family Ichneumonidae, first described by Henry Lorenz Viereck in 1905. The species is known from a small number of observations, with records indicating presence in North America. As with other members of the genus Cratichneumon, this species is presumed to be a parasitoid, though specific host relationships remain undocumented. The species epithet 'arizonensis' suggests a type locality or primary distribution associated with Arizona.
Cratichneumon pseudanisotae
Cratichneumon pseudanisotae is a species of ichneumon wasp described by Heinrich in 1961. It belongs to the large family Ichneumonidae, one of the most diverse families of parasitoid wasps. The genus Cratichneumon comprises medium-sized ichneumonids characterized by robust body proportions and specific wing venation patterns. Very few observations of this species have been recorded, with only two documented occurrences in iNaturalist.
Crenitis paradigma
Crenitis paradigma is a species of water scavenger beetle in the family Hydrophilidae. It is a small aquatic beetle known from western North America. The species was described by Orchymont in 1942. Like other members of the genus Crenitis, it is associated with aquatic or semi-aquatic habitats.
Cressonomyia
Cressonomyia is a genus of shore flies (Ephydridae) established by Arnaud in 1958. The genus is poorly documented in scientific literature, with minimal available information on its biology, ecology, or species composition. Records indicate extremely limited observational data, with only three documented observations on iNaturalist as of the knowledge cutoff. Like other ephydrids, members of this genus are presumed to be associated with aquatic or semi-aquatic habitats, though specific ecological details remain unverified.
Criorhina nasica
Black-backed Yellowjacket Fly
Criorhina nasica is a hoverfly species in the family Syrphidae, first described from North America in 1908. The species is known from limited observations and appears to be uncommon or underreported. It belongs to a genus characterized by bumble bee-mimicry, though specific morphological details for this species remain poorly documented in accessible literature.
Cryptocephalus sanguinicollis nigerrimus
A subspecies of case-bearing leaf beetle in the family Chrysomelidae. Described by Crotch in 1874. Very few observations exist, with only 3 records in iNaturalist. Known from Middle and North America.
Cryptotreta cislimitensis
Cryptotreta cislimitensis is a species of tephritid fruit fly described by Steyskal in 1977. It belongs to the genus Cryptotreta within the tribe Eutretini, a group of fruit flies known for their often patterned wings and association with plants. Very little published information exists on the biology or ecology of this species.
Cryptus moschator iroquois
Cryptus moschator iroquois is a subspecies of ichneumonid wasp described by Viereck in 1917. It belongs to the genus Cryptus, a group of parasitoid wasps within the family Ichneumonidae. The subspecies epithet 'iroquois' suggests a connection to the Iroquois region or peoples, though the specific etymology is not documented in available sources. Like other members of its genus, it is presumed to be a parasitoid, but specific host associations and biological details remain undocumented.
Cyamops
Cyamops is a genus of small flies in the family Periscelididae, subfamily Stenomicrinae. First described by Melander in 1913, this genus is part of the diverse order Diptera. The genus contains multiple species, though detailed biological information remains limited. Observations of this genus are rare, with only 12 records documented on iNaturalist.
Cyclotrachelus alternans
Cyclotrachelus alternans is a ground beetle species in the family Carabidae, described by Casey in 1920. It belongs to a genus of woodland ground beetles found in North America. The species has been documented in Canada and the United States, with limited observational records available.
Cyclotrachelus ovulum
A ground beetle in the genus Cyclotrachelus, family Carabidae. The genus name refers to the rounded, wheel-like pronotal shape characteristic of these beetles. Very few documented observations exist for this species.
Cyrtopogon perspicax
Cyrtopogon perspicax is a species of robber fly in the family Asilidae, described by Cole in 1919. Like other members of the genus Cyrtopogon, it is a predatory fly that captures other insects in flight. The species is known from limited observations, with only two records documented in iNaturalist as of the source date. Its specific epithet "perspicax" suggests keen perception or discernment, possibly alluding to visual acuity in hunting.
Dasyrhadus impressicollis
Dasyrhadus impressicollis is a species of soft-bodied plant beetle in the family Rhadalidae (sometimes treated as a subfamily within Melyridae). The species was described by Fall in 1910 and is known from a small number of observations in British Columbia, Canada. It belongs to a genus of beetles with limited published biological information.
Decadiomus bahamicus
Rubin Vase Lady Beetle
Decadiomus bahamicus is a species of lady beetle in the family Coccinellidae. It is native to the Caribbean region and has been recorded in southern Florida. The species is known by the common name "Rubin Vase Lady Beetle." Knowledge of this species is limited, with few documented observations.
Decarthron abnorme
ant eating beetle
Decarthron abnorme is a rove beetle (Staphylinidae) described by J.L. LeConte in 1849. It is known for its association with ants, earning it the common name 'ant eating beetle'. The species has been recorded across much of Canada and the northern and eastern United States. Despite its broad distribution, it remains poorly documented in the literature, with only a single observation in iNaturalist suggesting it is rarely encountered or underreported.
Deltometopus baranowskii
Deltometopus baranowskii is a species of false click beetle in the family Eucnemidae. The species is known from a single iNaturalist observation, indicating it is rarely encountered or potentially understudied. Members of the genus Deltometopus are characterized by their elongated body form and reduced click mechanism compared to true click beetles (Elateridae). The specific epithet honors an individual, likely a coleopterist or naturalist.
Deopalpus parksi
Deopalpus parksi is a species of tachinid fly described by Reinhard in 1934. The genus Deopalpus is a small group within the diverse Tachinidae family, which comprises parasitoid flies. Few observations of this species exist in public databases, with only four records on iNaturalist. Its biology and host relationships remain poorly documented.
Desmopachria circularis
Desmopachria circularis is a species of diving beetle described by Sharp in 1882. It belongs to the family Dytiscidae, a group of aquatic beetles adapted for underwater life. The genus Desmopachria is characterized by small body size and is distributed primarily in the Americas. This species is recorded from Middle America, though specific details about its biology remain poorly documented.
Diachus catarius
Diachus catarius is a leaf beetle species in the family Chrysomelidae, first described by Suffrian in 1852. The species is recorded from eastern Canada, specifically New Brunswick, Nova Scotia, and Ontario. Very few observations exist in public databases, suggesting it may be uncommon or underreported. As a member of Chrysomelidae, it belongs to a family of herbivorous beetles, though species-specific biology remains poorly documented.
Diaphorus pseudopacus
Diaphorus pseudopacus is a species of long-legged fly in the family Dolichopodidae, described by Robinson in 1964. It belongs to the genus Diaphorus, a group of small to medium-sized flies characterized by their elongated legs and metallic coloration. Very few observations of this species have been documented, with only 5 records on iNaturalist as of the source date. The specific epithet "pseudopacus" suggests a resemblance to or relationship with D. opacus, though the precise nature of this distinction requires examination of type specimens.
Dichagyris kyune
Dichagyris kyune is a species of noctuid moth (cutworm or dart moth) described by William Barnes in 1904. It belongs to the subfamily Noctuinae within the family Noctuidae. The species is recorded from North America and has been assigned the MONA/Hodges number 10880. Very few observations exist in public databases, suggesting it is rarely encountered or understudied.
Dicolonus sparsipilosus
Dicolonus sparsipilosus is a species of robber fly described by Back in 1909. It belongs to the genus Dicolonus within the family Asilidae, a group of predatory flies known for their agile flight and ambush hunting behavior. The species is rarely recorded, with minimal observation data available.
Diomus xanthaspis
Diomus xanthaspis is a small lady beetle species in the family Coccinellidae, first described by Mulsant in 1850. It is native to North America, with records from Brazil (Bahia) as well. The genus Diomus comprises minute lady beetles, many of which are poorly documented in terms of their biology and ecology. This species remains among the lesser-known members of the family, with very few observations recorded.
Dirophanes mellinus
Dirophanes mellinus is a species of ichneumon wasp in the family Ichneumonidae, first described by Provancher in 1875. The genus Dirophanes belongs to the diverse parasitoid wasp family Ichneumonidae, one of the largest families of insects. As with most ichneumonids, this species is presumed to be a parasitoid of other insects, though specific host records for D. mellinus are not well documented. The species is rarely encountered and poorly known in the scientific literature.
Dirotognathus
Dirotognathus is a genus of broad-nosed weevils in the beetle family Curculionidae, established by Horn in 1876. The genus contains at least two described species: D. punctatus (Hatch, 1971) and D. sordidus (Horn, 1876). As members of the subfamily Entiminae, these weevils possess the characteristic short, broad rostrum typical of broad-nosed weevils. The genus is placed in the tribe Byrsopagini. Very few observations exist in biodiversity databases, suggesting it may be rarely encountered or understudied.
Discodon abdominale
Discodon abdominale is a species of soldier beetle in the family Cantharidae, described by Schaeffer in 1909. It is found in North America. The genus Discodon is part of the diverse soldier beetle family, which contains numerous species with elongated bodies and soft elytra. Very few observations of this species have been documented.
Dolopomyrmex
Dolopomyrmex is a monotypic genus of ants in the subfamily Myrmicinae, containing only Dolopomyrmex pilatus. The genus is endemic to arid regions of the western and southwestern United States. These ants are believed to be almost exclusively subterranean, making them rarely observed above ground.
Dorcatoma falli
Dorcatoma falli is a small beetle species in the family Ptinidae, first described by R.E. White in 1965. The species is known from eastern Canada, with records from Nova Scotia, Ontario, and Québec. Like other members of the genus Dorcatoma, it likely inhabits decaying wood and fungal substrates, though specific ecological details remain poorly documented. The species is rarely encountered, with only three observations recorded in iNaturalist as of the source date.