Trechinae
Guides
Anillinus balli
Anillinus balli is a small ground beetle in the family Carabidae, described in 2004 by Sokolov and Carlton. It is one of numerous species in the genus Anillinus, a group of minute carabids characterized by reduced eyes and elongated appendages adapted for subterranean life. The species is found in the United States. Like other members of its genus, it is likely adapted to mesic forest habitats with deep leaf litter and soil crevices.
Anillinus barberi
Anillinus barberi is a small carabid beetle in the tribe Bembidiini, described by Jeannel in 1963. It belongs to a genus of minute ground beetles characterized by reduced or absent eyes and elongated appendages adapted for subterranean life. The species is known from the United States and is part of a poorly studied group of beetles with limited published ecological data.
Anillinus chilhowee
Anillinus chilhowee is a small ground beetle (Carabidae) in the tribe Bembidiini, described by Sokolov in 2011. It belongs to the genus Anillinus, a group of minute, eyeless or nearly eyeless beetles adapted to subterranean or deep soil habitats. The species epithet references the Chilhowee region, likely indicating its type locality in the southeastern United States.
Anillinus dentatus
Anillinus dentatus is a species of minute ground beetle in the family Carabidae. Members of the genus Anillinus are eyeless, subterranean beetles adapted to life in soil and cave environments. The specific epithet "dentatus" refers to toothed characteristics, likely of the mandibles or elytral margins. These beetles are part of the diverse North American cave beetle fauna, with species in this genus primarily distributed in the eastern and central United States.
Anillinus murrayae
Anillinus murrayae is a small ground beetle in the family Carabidae, described by Sokolov and Carlton in 2004. It belongs to the genus Anillinus, a group of minute, eyeless or nearly eyeless beetles adapted to subterranean and soil-dwelling lifestyles. The species is known from the United States. Like other members of its genus, it likely inhabits deep soil and leaf litter layers in forested environments.
Anillinus pecki
Anillinus pecki is a species of small ground beetle in the family Carabidae, described by Giachino in 2011. It belongs to the subtribe Anillina, a group of minute carabid beetles often associated with subterranean or soil-dwelling habitats. The genus Anillinus is endemic to North America, with species distributed primarily in the eastern and central United States. Like other anillines, this species is likely eyeless or has highly reduced eyes and exhibits morphological adaptations for life in soil, leaf litter, or cave-like microhabitats.
Anillinus virginiae
Anillinus virginiae is a species of ground beetle in the family Carabidae, described by Jeannel in 1963. It belongs to the genus Anillinus, a group of small, eyeless or reduced-eye beetles adapted to subterranean or cryptic habitats. The species is known from the United States, with the specific epithet suggesting a type locality in Virginia. Like other members of the subtribe Anillina, it is likely associated with soil and leaf litter environments.
Bembidiina
A large subtribe of ground beetles (Carabidae) comprising over 120 genera and more than 3,100 described species. Members are generally small to minute beetles with diverse morphologies across numerous subgenera. The subtribe has a cosmopolitan distribution with major centers of diversity in the Palaearctic and Afrotropical regions. Taxonomic revisions continue to refine species boundaries, synonymies, and subgeneric placements based on male genitalia and elytral microsculpture.
Bembidiini
Bembidiini is a large tribe of ground beetles (Carabidae) comprising over 120 genera and approximately 3,100 described species. Members are predominantly small to minute beetles, often found in riparian, intertidal, subterranean, and arboreal habitats. The tribe includes notable subtribes such as Xystosomina (arboreal tropical beetles) and Anillina (small litter-dwelling forms), as well as the subtribe Lovriciina containing highly specialized cave-dwelling species. Many species exhibit narrow habitat specificity, including intertidal gravel beaches and tropical forest canopy systems.
Bembidion antiquum
Bembidion antiquum is a species of ground beetle in the subfamily Trechinae, first described by Dejean in 1831. It occurs in North America, specifically in Canada and the United States. The species belongs to the large genus Bembidion, which comprises numerous small ground beetle species commonly found in diverse terrestrial habitats.
Bembidion mckinleyi
Bembidion mckinleyi is a species of ground beetle in the family Carabidae, first described by Fall in 1926. It is a member of the large genus Bembidion, which contains over 1,400 described species of small to medium-sized carabid beetles. The species is known from both North America and Europe, with three recognized subspecies: B. m. mckinleyi, B. m. carneum, and B. m. scandicum. Like other members of its genus, it is likely associated with moist habitats near water bodies.
Bembidion rapidum
Bembidion rapidum is a small ground beetle in the subfamily Trechinae, found in Canada and the United States. It measures 3.8–4.4 mm in length and has a black body with brassy metallic reflections. The species has been recorded in agricultural studies, where it showed sensitivity to soil management practices, with populations persisting better under strip tillage than conventional tillage or plasticulture.
Bembidion rolandi
Bembidion rolandi is a species of ground beetle in the subfamily Trechinae. The species was described by Fall in 1922. It is distributed across Canada and the United States. As a member of the genus Bembidion, it belongs to a diverse group of small predatory beetles commonly found in riparian and moist habitats.
Bembidion sordidum
Bembidion sordidum is a species of ground beetle in the family Carabidae. It is distributed across northern North America including Alaska, Canada, and the United States. As a member of the genus Bembidion, it belongs to a large and diverse group of small predatory beetles commonly found in varied terrestrial and riparian habitats.
Diplochaetus
Diplochaetus is a genus of ground beetles in the family Carabidae, established by Chaudoir in 1872. The genus contains at least four described species distributed across North, Central, and South America. Members of this genus belong to the tribe Pogonini within the subfamily Trechinae. These beetles are part of the diverse ground beetle fauna inhabiting various terrestrial environments in the Americas.
Diplochaetus planatus
Diplochaetus planatus is a ground beetle species in the family Carabidae, first described by G.Horn in 1876. It belongs to the tribe Pogonini within the subfamily Trechinae. The species is native to North America, with records from the United States. Like other members of Carabidae, it is a predatory beetle. Very little specific information about its biology, ecology, or behavior has been documented in the available sources.
Elaphropus
Elaphropus is a genus of ground beetles in the family Carabidae, containing at least 370 described species. These small beetles belong to the tribe Bembidiini and are part of the diverse carabid fauna found across multiple continents. The genus was established by Motschulsky in 1839 and represents a significant component of global ground beetle diversity.
Elaphropus anceps
Elaphropus anceps is a small ground beetle in the family Carabidae, subfamily Trechinae. It belongs to a diverse genus of minute carabids often found in moist microhabitats. The species is known from North America, with records from the United States and Canada. Like other members of the tribe Bembidiini, it is likely associated with riparian or wetland edges, though specific ecological details remain poorly documented.
Elaphropus dolosus
Elaphropus dolosus is a small ground beetle species in the family Carabidae, first described by LeConte in 1848. It is recorded from North America, with documented occurrences in Canada and the United States. The genus Elaphropus comprises small carabid beetles often associated with riparian and moist habitats, though specific ecological details for this species remain limited in published sources.
Elaphropus fuscicornis
Elaphropus fuscicornis is a small ground beetle in the family Carabidae, first described by Chaudoir in 1868. The genus Elaphropus belongs to the tribe Bembidiini and comprises diminutive carabids often found in moist microhabitats. This species is known from the United States with records from North America.
Elaphropus incurvus
Elaphropus incurvus is a small ground beetle in the family Carabidae, described by Thomas Say in 1830. It belongs to a genus of diminutive carabids often associated with moist microhabitats. The species is documented from North America, with records from both the United States and Canada. Like other members of Elaphropus, it is likely a ground-dwelling predator, though specific ecological studies are limited.
Elaphropus saturatus
Elaphropus saturatus is a species of ground beetle in the subfamily Trechinae. It was described by Casey in 1918. The species belongs to a large genus of small carabid beetles. Very little is known about its biology or ecology.
Horologion
Horologion is one of the rarest and most enigmatic carabid beetle genera, containing two known species of troglomorphic ground beetles endemic to the middle Appalachian Mountains. The genus remained monotypic for over 60 years after its description in 1932, with a second species discovered in Virginia in 1991 and described in 2024. Phylogenetic analysis places Horologion in supertribe Trechitae as sister to the Gondwanan tribe Bembidarenini, making tribe Horologionini a relict lineage with no close relatives in the Northern Hemisphere.
Micratopus insularis
Micratopus insularis is a species of ground beetle in the family Carabidae, described by Darlington in 1934. The species is endemic to the Lesser Antilles in the Caribbean. As a member of the tribe Bembidiini, it belongs to a diverse group of small carabid beetles often associated with riparian or moist habitats. The genus Micratopus is part of the subtribe Tachyina, which contains numerous species with reduced or modified wings and island-associated distributions.
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.
Nelsonites jonesi
Nelsonites jonesi is a species of ground beetle in the family Carabidae. It belongs to the subfamily Trechinae, a group that includes many cave-dwelling and ground-dwelling beetles. The genus Nelsonites is recognized within Carabidae, though specific details about this particular species remain poorly documented in available sources.
Phrypeus rickseckeri
Phrypeus rickseckeri is a ground beetle in the family Carabidae, originally described as Bembidion rickseckeri by Hayward in 1897. It is a member of the tribe Sinozolini within the subfamily Trechinae. The species is known from North America, with records from Canada and the United States. Available information is limited, with only five observations documented on iNaturalist.
Pogonini
Pogonini is a tribe of ground beetles (Carabidae: Trechinae) comprising approximately 12 genera and more than 80 described species, with the genus Pogonus containing over half of all species. Members are strongly associated with saline environments, occurring in inland salt flats and along ocean coastlines. The tribe shows strong geographic regionalization, with distinct faunas in the New World (8 recognized species) and the Ibero-Balearic region (11 species across 3 genera).
Pseudanophthalmus cerberus completus
Pseudanophthalmus cerberus completus is a subspecies of small carabid beetle described by Barr in 1985. It belongs to the genus Pseudanophthalmus, a group of troglobitic (cave-dwelling) ground beetles endemic to North America. The subspecies epithet "completus" indicates it represents a fully differentiated form within the P. cerberus species complex. Like other members of this genus, it is likely restricted to subterranean habitats in the eastern United States.
Pseudanophthalmus holsingeri
Holsinger's Cave Beetle
Pseudanophthalmus holsingeri, known as Holsinger's Cave Beetle, is a troglobitic ground beetle endemic to Virginia, United States. The species was described by Thomas C. Barr in 1965. As a member of the genus Pseudanophthalmus, it is adapted to subterranean cave environments.
Pseudanophthalmus nelsoni
Nelson's Cave Beetle
Pseudanophthalmus nelsoni is a small, eyeless ground beetle in the family Carabidae. Described by Barr in 1965, this troglobitic species inhabits cave systems in the United States. Like other members of its genus, it exhibits adaptations to subterranean life including reduced or absent eyes and pale coloration. The species is named in honor of an individual associated with its discovery or study.
Serranillus
Serranillus is a genus of small ground beetles in the family Carabidae. The genus was established by Barr in 1995 and contains three described species, all endemic to the United States. These beetles belong to the subtribe Anillina, a group characterized by reduced eyes and elongate bodies adapted to subterranean or soil-dwelling habits. The genus is relatively poorly known, with limited ecological and biological data published.
Serranillus dunavani
Serranillus dunavani is a species of ground beetle in the family Carabidae, described by Jeannel in 1963. It belongs to the subtribe Anillina, a group of minute carabid beetles characterized by reduced eyes and subterranean habits. The species is known from the United States.
Tachyina
Tachyina is a subtribe of small ground beetles (Carabidae: Trechinae: Bembidiini) established by Motschulsky in 1862. Members include diminutive species typically measuring 2–3 mm in body length. The subtribe contains genera such as Tachyura, characterized by distinctive male genitalic morphology and specific puncture patterns on the elytra. Taxonomic revisions continue to clarify species boundaries and the availability of historical infrasubspecific names.
Tachys
Tachys is a genus of ground beetles in the family Carabidae, subfamily Trechinae, tribe Bembidiini. The genus contains at least 270 described species, making it one of the larger genera within the ground beetles. Species have been documented across multiple continents including North America, Europe, Asia, and India. Members are small, fast-running beetles typically associated with moist microhabitats.
Tachys columbiensis
Tachys columbiensis is a species of ground beetle in the family Carabidae, described by Hayward in 1900. It belongs to the genus Tachys, a diverse group of small, fast-running beetles commonly known as 'tachys' or 'minute ground beetles.' The genus is characterized by tiny body size and rapid movement. Records indicate presence in the United States and North America.
Tachys pallidus
Tachys pallidus is a small ground beetle in the family Carabidae, subfamily Trechinae. The species is documented from North America, with observation records from the United States. Like other members of the genus Tachys, it likely inhabits moist ground-level microhabitats. Taxonomic authority has been attributed to both Chaudoir (1868) and Reitter (1884), with the former currently accepted.
Tachys potomaca
Tachys potomaca is a species of ground beetle in the family Carabidae, described by Erwin in 1981. It belongs to the tribe Bembidiini within the subfamily Trechinae. The species has been recorded in the United States, with distribution data indicating presence in North America. It was originally described under the genus Paratachys, which is now treated as a synonym or subgenus of Tachys. Like other members of the genus, it is likely a small, fast-running beetle associated with ground habitats.
Tachys rhodeanus
Tachys rhodeanus is a species of ground beetle in the family Carabidae. It is found in North America. The species was described by Casey in 1918.
Tachyta
Tachyta is a genus of ground beetles in the family Carabidae, first described by Kirby in 1837. The genus contains more than 30 described species. These beetles are members of the tribe Bembidiini within the subfamily Trechinae.
Trechus apicalis
Trechus apicalis is a species of ground beetle in the subfamily Trechinae, first described by Motschulsky in 1845. It belongs to the large genus Trechus, which comprises numerous small carabid beetles often associated with cool, moist habitats. The species has a Holarctic distribution, occurring across northern regions of North America and Eurasia.
Trechus satanicus
Trechus satanicus is a species of ground beetle in the subfamily Trechinae, described by Barr in 1962. It belongs to the genus Trechus, a large and diverse group of small carabid beetles distributed across the Northern Hemisphere. The species epithet "satanicus" refers to its association with subterranean or cave-like habitats, from which the name derives. Like other members of Trechus, it is likely adapted to moist, dark microhabitats.
Trechus tuckaleechee
Trechus tuckaleechee is a species of ground beetle in the subfamily Trechinae, described by Barr in 1962. It belongs to the genus Trechus, a large and widespread group of small carabid beetles commonly known as blind beetles or trechine ground beetles. The species epithet 'tuckaleechee' likely references Tuckaleechee, a location in Tennessee, USA, suggesting a restricted geographic distribution. Like other Trechus species, it is presumably adapted to subterranean or cryptic habitats.
Trechus vandykei
Trechus vandykei is a species of ground beetle in the family Carabidae, subfamily Trechinae. It was described by Jeannel in 1927. The species is currently accepted as valid, though some sources list it as a synonym of Trechus striatulus. It belongs to the large genus Trechus, which contains numerous ground beetle species distributed across North America and other regions.
Xenotrechus
Xenotrechus is a genus of ground beetles (Carabidae) described by Barr & Krekeler in 1967. It contains two described species: X. condei and X. denticollis. The genus belongs to the tribe Trechini within the subfamily Trechinae, placing it among the small, often eyeless or reduced-eyed beetles adapted to subterranean or specialized habitats.
Xenotrechus condei
Northern Xenotrechus Cave Beetle
Xenotrechus condei is a cave-dwelling ground beetle in the family Carabidae, subfamily Trechinae. It is one of several species in the genus Xenotrechus, a group specialized for subterranean habitats. The species was described in 1967 from specimens collected in the United States. It represents a lineage of beetles that have adapted to permanent darkness and associated cave conditions.