broad-nosed weevil
Ophryastes vittatus is a species of broad-nosed weevil first described by Thomas Say in 1824. The species belongs to the subfamily Entiminae, a group characterized by their broad, short rostrums compared to other weevils. It occurs in western and central North America, with records from Arizona, Colorado, Kansas, Nebraska, and Nevada. The specific epithet "vittatus" refers to a striped or banded appearance, though detailed descriptions of this pattern are limited in available sources.
Smyth's Beach Tiger Beetle
A subspecies of beach tiger beetle in the family Cicindelidae. Belongs to the genus Opilidia, which contains species adapted to sandy coastal and riparian habitats. The subspecies was described by E.D. Harris in 1913.
Opilo domesticus is a species of checkered beetle in the family Cleridae. It has a broad geographic distribution spanning Africa, Europe and Northern Asia (excluding China), Central America, and North America. The species was originally described as Notoxus domesticus by Sturm in 1837. Its biology and ecology remain poorly documented in the scientific literature.
pinnacles optioservus riffle beetle
Optioservus canus is a species of riffle beetle in the family Elmidae, first described by Chandler in 1954. Riffle beetles are aquatic insects that inhabit running water environments. The species is known from North America.
Optioservus immunis is a species of riffle beetle in the family Elmidae, first described by Fall in 1925. It is one of thirteen Nearctic species in the genus, distinguished from congeners primarily by male genitalia and elytral pattern. The species was previously known under the synonym Optioservus cryophilus.
Optioservus trivittatus is a species of riffle beetle in the family Elmidae. It is found in North America, with records from Canada including New Brunswick, Newfoundland, Nova Scotia, and Ontario. Riffle beetles in this family are aquatic insects typically associated with running water habitats. The species was described by Brown in 1930 and has been subject to taxonomic revision based on male genitalia, elytral patterns, and geographic distribution.
flea marsh beetles
Ora is a genus of flea marsh beetles in the family Scirtidae, containing approximately 17 described species. These small beetles inhabit wetland environments and are characterized by their association with marshy habitats. The genus was established by Clark in 1865 and represents one of several genera within the Scirtidae family, which are commonly known as marsh beetles.
marsh beetle
Ora discoidea is a species of marsh beetle in the family Scirtidae, described by Champion in 1897. It occurs in Central America and has been recorded in North America from Texas to Florida. The species belongs to a family commonly associated with moist habitats, though specific ecological details remain poorly documented.
Texas flea marsh beetle
Ora texana is a species of marsh beetle in the family Scirtidae. It is commonly known as the Texas flea marsh beetle. The species is distributed across eastern and south-central North America, with records from the United States extending south to Costa Rica.
Marsh Flea Beetle
Ora troberti is a species of marsh beetle in the family Scirtidae, commonly known as the Marsh Flea Beetle. It occurs in the southeastern United States and extends south through Central America. The species belongs to a family of small beetles typically associated with moist or aquatic habitats. As with other members of Scirtidae, its biology is poorly documented in published literature.
Orchesia ornata is a small beetle in the family Melandryidae (false darkling beetles), described by Horn in 1888. It belongs to a genus of beetles typically associated with decaying wood and fungi. Very little published information exists specifically for this species, though its genus is known from forested habitats in North America.
Orchesia ovata is a species of false darkling beetle in the family Melandryidae, described by Laliberté in 1967. It belongs to a family of beetles commonly associated with decaying wood and fungal habitats. The species has been documented in eastern Canada, with records from New Brunswick, Nova Scotia, Ontario, Prince Edward Island, and Quebec. Like other members of its genus, it likely inhabits forested environments where it contributes to the decomposition of woody material.
false darkling beetles
Orchesiini is a tribe of false darkling beetles within the family Melandryidae, established by Mulsant in 1856. The tribe contains at least three genera—Orchesia, Microscapha, and Lederia—with approximately seven described species. These beetles are classified in the superfamily Tenebrionoidea and are part of the diverse assemblage of darkling beetle relatives. Members of Orchesiini are small to medium-sized beetles found primarily in forested habitats where they occur in association with decaying wood and fungi.
A weevil species in the genus Orchestes, described in 2004 by Alonso-Zarazaga. It belongs to the family Curculionidae, one of the largest families of beetles. Very little specific information has been published about this species beyond its taxonomic description.
Beech leaf-mining weevil, beech leaf-miner beetle
Orchestes fagi is a small weevil species native to Europe that has become invasive in North America, where it attacks American beech (Fagus grandifolia). The larvae mine the leaves of beech trees, while adults undergo an extended diapause of eight to nine months, overwintering on tree boles. The species has spread through eastern Nova Scotia, Canada, with human-assisted transport via firewood and timber implicated in its range expansion.
Orchestes mixtus is a weevil species in the family Curculionidae, first described by Blatchley and Leng in 1916. The species is recorded from multiple Canadian provinces including Alberta, British Columbia, Manitoba, New Brunswick, and Nova Scotia. As a member of the genus Orchestes, it belongs to a group of small weevils commonly known as elm leaf weevils or flea weevils, many of which are associated with elm trees.
minute seed weevils
Orchestomerus is a genus of minute seed weevils in the family Curculionidae, established by W.G. Dietz in 1896. The genus comprises approximately 14 described species. These beetles are small weevils associated with seeds, though specific host relationships remain poorly documented for most species.
Orchestomerus marionis is a species of weevil in the family Curculionidae. The species is provisionally accepted in taxonomic databases. As a member of Orchestomerus, it belongs to a genus of small weevils within the superfamily Curculionoidea. Specific biological details for this species remain poorly documented in the available literature.
Orchestomerus wickhami is a species of weevil in the family Curculionidae, described by Dietz in 1896. The genus Orchestomerus belongs to the superfamily Curculionoidea. Very little specific biological or ecological information is documented for this particular species.
Oreodytes humboldtensis is a species of predaceous diving beetle in the family Dytiscidae, described by Zimmerman in 1985. As a member of the genus Oreodytes, it belongs to a group of small diving beetles primarily associated with running water habitats. The species epithet suggests a connection to the Humboldt region, likely referring to Humboldt County or the broader Humboldt Bay area of coastal northern California. Like other Oreodytes species, it is presumed to be an aquatic predator in freshwater systems.
Ormiscus fasciatus is a species of fungus weevil in the family Anthribidae. First described by Leconte in 1884, this beetle is known from North America. The species is poorly documented in scientific literature, with only two observations recorded on iNaturalist.
Ormiscus irroratus is a fungus weevil species in the family Anthribidae, described by Schaeffer in 1904. It belongs to a group of beetles commonly associated with fungal associations. The species is known from North America, though detailed biological information remains limited.
Ormiscus quercus is a species of fungus weevil (family Anthribidae) described by Schaeffer in 1906. The specific epithet "quercus" suggests an association with oak (Quercus), a pattern common in this genus. Anthribidae weevils are typically associated with fungi, often found on decaying wood or fungal fruiting bodies.
Orochares is a genus of rove beetles (Staphylinidae: Omaliinae) established by Kraatz in 1857. The genus is classified within the tribe Anthophagini. One species, Orochares debilis Sharp, has been the subject of specific ecological study. Records indicate presence in northern Europe and northeastern North America.
Orochares suteri is a species of rove beetle (Staphylinidae) described by Campbell in 1984. It belongs to the subfamily Omaliinae, a group of small to medium-sized staphylinids often associated with decaying organic matter and forest floor habitats. The species is known from a limited number of records in the northeastern and midwestern United States.
Oropodes chumash is a species of ant-loving beetle in the family Staphylinidae, subfamily Pselaphinae. It was described in 2011 by Chandler & Caterino. The species epithet refers to the Chumash people, indigenous to coastal California. Like other pselaphines, it is likely associated with ant colonies, though specific biological details remain poorly documented. The species is known from California, USA.
Orthochaetes is a genus of weevils in the family Curculionidae, tribe Styphlini, established by Germar in 1823. The genus has Palearctic origins, with at least one species, Orthochaetes setiger, documented as an adventive introduction to North America. Records from Canada indicate establishment in Newfoundland and British Columbia. The genus is characterized by morphological features distinguishing it from other Styphlini genera, requiring modified identification keys for North American fauna.
Pitted Fungus Beetle
Orthocis punctatus is a minute tree-fungus beetle in the family Ciidae. It is native to North America, with records from multiple Canadian provinces including Alberta, British Columbia, and Manitoba. The species is associated with fungal habitats on trees. As with other ciid beetles, it is small-bodied and adapted to life in decaying wood with fungal growth.
flower longhorn
Ortholeptura insignis is a species of flower longhorn beetle in the family Cerambycidae. The species is distributed across Central America and North America, including Mexico and the United States. As a member of the subfamily Lepturinae, it is associated with flowers where adults are typically found feeding on pollen.
minute hooded beetle
Orthoperus scutellaris is a species of minute hooded beetle in the family Corylophidae, first described by LeConte in 1878. It is one of the smallest beetles in North America, measuring less than 1 mm in length. The species belongs to a family of beetles commonly known as minute hooded beetles or minute fungus beetles, though specific ecological details for this species remain poorly documented.
Orthopleurinae is a subfamily of checkered beetles (family Cleridae) established by Böving and Craighead in 1931. It is currently treated as a synonym of Korynetinae in modern classifications. The group contains few documented observations, with only 8 records in iNaturalist. Its members belong to the superfamily Cleroidea within the diverse beetle suborder Polyphaga.
Orthostethus is a genus of click beetles (family Elateridae) established by Lacordaire in 1857. The genus contains at least two described species: Orthostethus caviceps (described by Schaeffer, 1916) and Orthostethus infuscatus (originally described by Germar, 1844). Like other elaterids, members of this genus possess the characteristic clicking mechanism formed by the prosternal process and mesosternal groove, which allows them to right themselves when flipped onto their backs.
Orthostethus pectinicornis is a species of click beetle in the family Elateridae. The specific epithet "pectinicornis" refers to the comb-like (pectinate) antennae characteristic of males in this species, a trait shared with other members of the genus. Click beetles are named for their ability to right themselves when overturned by flexing a prosternal spine into a mesosternal groove, producing an audible clicking sound and propelling the beetle into the air.
Orus ferrugineus is a species of rove beetle (family Staphylinidae) in the subfamily Paederinae, described by Casey in 1905. The species is known from the western United States, with records from Arizona, California, Colorado, New Mexico, and Utah. As a member of the large rove beetle family, it likely inhabits soil and leaf litter environments typical of the group, though specific ecological details remain poorly documented.
Orwellion gibbulum arizonense is a subspecies of longhorn beetle in the family Cerambycidae. It belongs to the tribe Elaphidiini within the subfamily Cerambycinae. The subspecies was described by Casey in 1891 and is distributed in parts of North and Middle America. Very little specific information is documented about this particular subspecies beyond its taxonomic status and general geographic occurrence.
Merchant Grain Beetle
A small, flattened beetle approximately 2.5–3 mm in length. A cosmopolitan pest of stored food products, particularly processed cereals and oilseeds with high oil content. Distinguished from the nearly identical Oryzaephilus surinamensis by its larger eyes and narrower head behind the eyes. Unlike O. surinamensis, adults are capable of flight.
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.
unmargined rove beetle
Osorius planifrons is a rove beetle in the family Staphylinidae, subfamily Osoriinae. It belongs to a group commonly referred to as unmargined rove beetles. The species has been recorded in parts of North and Central America, with documented occurrences in the southeastern and southwestern United States and Mexico. Specific ecological and behavioral details remain limited in published sources.
false darkling beetles
Osphya is a genus of false darkling beetles (Coleoptera: Melandryidae: Osphyinae) comprising approximately seven to ten described species. The genus originated in the mid-Cretaceous and exhibits a discontinuous, uneven distribution across the Northern Hemisphere, with highest species richness in the Mediterranean region of Europe. It is considered a relict insect group with conservative ecological preferences.
Variable False Darkling Beetle
Osphya varians is a species of false darkling beetle in the family Melandryidae. It is known from eastern Canada, specifically Ontario and Québec. The specific epithet "varians" suggests variable characteristics, though detailed documentation of this variability is limited in available sources. Like other members of Melandryidae, it belongs to a family of beetles commonly associated with decaying wood and fungal habitats.
Ostomopsis is a genus of minute bark beetles in the family Cerylonidae, established by Scott in 1922. The genus contains at least three described species: O. kuscheli, O. neotropicalis, and O. watti. These beetles belong to the subfamily Ostomopsinae and are part of the diverse Cerylonidae family within the superfamily Coccinelloidea.
Ostomopsis neotropicalis is a small beetle species in the family Cerylonidae, described by Lawrence & Stephan in 1975. The species is native to the Neotropical and southern Nearctic regions, with records from Middle America and North America. Cerylonidae are generally associated with decaying wood, fungi, or stored organic materials, though specific biology for this species remains poorly documented.
antlike weevils
Otidocephalini is a tribe of antlike weevils in the family Curculionidae, characterized by morphological adaptations resembling ants. The tribe comprises at least 6 genera including Laemomerus, Micromyrmex, Myrmex, Oopterinus, Otidocephalus, and Ptinopsis. Members occur in North and South America, with notable diversity in the Amazon and Atlantic Forest regions. Formerly classified as a subfamily (Otidocephalinae), the group now holds tribal rank within Curculionidae.
privet weevil
Otiorhynchus crataegi, commonly known as the privet weevil, is a broad-nosed weevil in the family Curculionidae. It belongs to the large genus Otiorhynchus, which contains numerous root-feeding weevil species. The species was first described by Germar in 1823.
Oulema concolor is a species of leaf beetle in the family Chrysomelidae, first described by J.L. LeConte in 1884. It is distributed across Central America and North America. The genus Oulema belongs to the subfamily Criocerinae, commonly known as cereal leaf beetles and their relatives. As with many Oulema species, detailed biological information remains limited in published literature.
Oulema sayi is a species of leaf beetle in the family Chrysomelidae. It was described by Crotch in 1873 and is known from North America. The genus Oulema includes numerous leaf beetle species, many of which are associated with grasses and cereal crops.
Oxacis cana is a species of false blister beetle in the family Oedemeridae. It was described by LeConte in 1854 and is distributed across Central America and North America. The species belongs to a genus of slender, soft-bodied beetles commonly known as false blister beetles.
Oxacis debilis is a species of false blister beetle in the family Oedemeridae. The genus Oxacis is primarily Neotropical in distribution, with some species extending into the southern United States. Members of Oedemeridae are commonly known as false blister beetles due to their production of cantharidin, a defensive compound that can cause blistering on human skin. The specific epithet "debilis" (Latin for weak or feeble) may refer to morphological characteristics of the species.
Pallid False Blister Beetle
Oxacis pallida is a species of false blister beetle in the family Oedemeridae. It occurs in Central America and North America. Members of the family Oedemeridae are commonly known as false blister beetles or false oil beetles, distinguished from true blister beetles (Meloidae) by morphological and ecological differences. The species was described by LeConte in 1854.
Oxacis taeniata is a species of false blister beetle in the family Oedemeridae, first described by LeConte in 1854. The species is distributed across the Caribbean and North America. As a member of Oedemeridae, it shares the family characteristic of producing cantharidin, a defensive compound. Available information on this species remains limited, with only five observations documented on iNaturalist.