Leiodidae
Guides
Agathidium dubitans
Agathidium dubitans is a species of round fungus beetle in the family Leiodidae, described by Henry Clinton Fall in 1934. The specific epithet "dubitans" is Latin for "doubting," reflecting taxonomic uncertainty at the time of description. Records indicate occurrence in the United States across Arizona, New Mexico, Ohio, Pennsylvania, and Tennessee. The species belongs to the subgenus Revolvens within the genus Agathidium.
Agathidium hamulum
Agathidium hamulum is a species of round fungus beetle in the family Leiodidae, described by Miller and Wheeler in 2005. The specific epithet "hamulum" refers to a small hook, likely describing a morphological feature of this species. Like other members of the genus Agathidium, it is presumed to be associated with fungi and decaying organic matter. The species has been documented in both Canada and the northeastern United States.
Agathidium maculosum
Agathidium maculosum is a species of slime mold beetle in the family Leiodidae, first described by Brown in 1928. The species epithet 'maculosum' refers to spotted or mottled coloration. It belongs to a genus known for feeding on slime molds (Myxomycetes). The species has been recorded in western North America.
Agathidium mollinum
Agathidium mollinum is a species of round fungus beetle in the family Leiodidae, first described by Fall in 1934. It belongs to the subgenus Concinnum within the genus Agathidium. The species occurs in northeastern North America, with records from both Canada and the United States.
Agathidium oniscoides
round fungus beetle
Agathidium oniscoides is a species of round fungus beetle in the family Leiodidae, described by Palisot de Beauvois in 1817. The species is found across eastern and central North America, from Canada through the United States. The specific epithet "oniscoides" derives from the Greek "oniskos" (woodlouse) and "-oides" (resembling), indicating a resemblance to woodlice. Like other members of the genus Agathidium, this species is associated with fungal habitats.
Agathidium repentinum
Agathidium repentinum is a species of round fungus beetle in the family Leiodidae, described by Horn in 1880. It is distributed across northern North America, with records from Canada (Alberta, Manitoba, Newfoundland and Labrador, Yukon) and the United States (Alaska, New Hampshire). The specific epithet "repentinum" derives from Latin, possibly referring to sudden or unexpected characteristics. Like other members of the genus, it is presumed to be associated with fungal habitats, though detailed ecological studies are limited.
Agathidium rusticum
Agathidium rusticum is a species of round fungus beetle in the family Leiodidae, described by Fall in 1934. It belongs to the genus Agathidium, a group of small beetles commonly associated with fungal habitats. The species is known from North America, with records from both Canada and the United States.
Aglyptinus
round fungus beetles
Aglyptinus is a genus of small, rounded beetles in the family Leiodidae, commonly known as round fungus beetles. The genus was established by Cockerell in 1906 and contains over forty described species. Members are classified within the tribe Scotocryptini and are associated with fungal habitats. The genus is distributed across North America, with Aglyptinus laevis being the most well-documented species in the United States and Canada.
Aglyptinus laevis
Aglyptinus laevis is a species of round fungus beetle in the family Leiodidae, first described by John Lawrence LeConte in 1853. It is a small, inconspicuous beetle with a broad North American distribution spanning eastern and central United States and southern Canada. As a member of the tribe Scotocryptini, it belongs to a group of beetles associated with fungal habitats. The species has been documented in 23 U.S. states and two Canadian provinces, with records concentrated in the Midwest, Southeast, and Mid-Atlantic regions.
Anemadini
Anemadini is a tribe of small carrion beetles within the subfamily Cholevinae (family Leiodidae). The tribe comprises at least 30 genera and more than 70 described species. Members exhibit diverse ecological adaptations, including forest-dwelling carrion feeders, cave inhabitants, and myrmecophiles living in ant nests. Some lineages show morphological modifications associated with subterranean life, such as reduced or absent eyes.
Anisotoma
slime mold beetles, round fungus beetles
Anisotoma is a genus of small beetles in the family Leiodidae, commonly known as slime mold beetles or round fungus beetles. The genus contains at least 20 described species, with six monophyletic species groups comprising 35 known species including 13 described in a 1979 revision. These beetles are specialized associates of slime molds (Myxomycetes). The genus originated in North America from a Holarctic common ancestor shared with the related genus Agathidium, subsequently dispersing to Palearctic and Central American regions.
Anisotoma amica
round fungus beetle
Anisotoma amica is a species of round fungus beetle in the family Leiodidae, first described by W. J. Brown in 1937. It is found across northern and western North America, from Alaska and Canada through the western United States. As a member of the Anisotoma genus, it is associated with fungal habitats, though specific ecological details remain poorly documented.
Anisotoma basalis
Anisotoma basalis is a species of small carrion beetle in the family Leiodidae. It is native to eastern North America, with records spanning from Canada to the southern United States. The species was first described by J.L. LeConte in 1853 under the basionym Leiodes basalis. Like other members of the genus Anisotoma, it is associated with decomposing organic matter.
Anisotoma confusa
Anisotoma confusa is a species of round fungus beetle in the family Leiodidae, first described by George Henry Horn in 1880. The species occurs in western North America from Alaska to California. As a member of the tribe Anisotomini, it belongs to a group of small beetles primarily associated with fungal habitats. The specific epithet "confusa" suggests historical taxonomic confusion with related species.
Anisotoma discolor
round fungus beetle
Anisotoma discolor is a species of round fungus beetle in the family Leiodidae. It is found across eastern and central North America, from Canada through the United States. The species was first described by F. E. Melsheimer in 1844. As a member of the round fungus beetle group, it is associated with fungal habitats.
Anisotoma errans
Anisotoma errans is a species of round fungus beetle in the family Leiodidae, described by W. J. Brown in 1937. It is distributed across northern North America, with records from Canada and the northern United States. Like other members of its genus, it is likely associated with fungal habitats.
Anisotoma expolita
Anisotoma expolita is a species of small carrion beetle in the family Leiodidae, described by W. J. Brown in 1937. It belongs to the tribe Anisotomini, a group commonly associated with decaying organic matter and fungal habitats. The species is recorded from several states in the eastern and central United States.
Anisotoma geminata
Anisotoma geminata is a small round fungus beetle in the family Leiodidae, a group specialized for feeding on fungal fruiting bodies. The species was described by Horn in 1880 and occurs across eastern North America, with records spanning from Canada to the southern United States. Like other members of its genus, it is likely associated with decaying fungi in forest habitats.
Anisotoma humeralis
round fungus beetle
Anisotoma humeralis is a species of round fungus beetle in the family Leiodidae. It is distributed across Europe, Northern Asia (excluding China), and North America. The species was first described by A.G. Olivier in 1790. It belongs to a genus of small beetles commonly associated with fungal habitats.
Anogdus dissimilis
Anogdus dissimilis is a species of round fungus beetle in the family Leiodidae. It was described by Blatchley in 1916. The species is known from scattered records across eastern North America, from Canada to the southern United States.
Cainosternum imbricatum
Cainosternum imbricatum is a small beetle species in the family Leiodidae, first described by Notman in 1921. It belongs to a genus of beetles associated with decaying organic matter and fungal habitats. The species is known from limited collection records in the eastern United States. As with many Leiodidae, it likely inhabits moist, decomposing substrates, though specific ecological details remain poorly documented.
Catopocerus
Catopocerus is a genus of small beetles in the family Leiodidae, subfamily Catopocerinae. These beetles are primarily subterranean or cave-dwelling, with reduced eyes and elongated appendages adapted to dark environments. The genus was established by Motschulsky in 1870 and contains species distributed across parts of North America and Eurasia. Members of this genus are among the most troglomorphic beetles in their family.
Catopocerus politus
Catopocerus politus is a species of small carrion beetle in the family Leiodidae, first described by Motschulsky in 1870. It belongs to the subfamily Catopocerinae, a group of beetles primarily associated with decomposing organic matter. The species has been recorded from several eastern U.S. states including Maryland, Virginia, Pennsylvania, North Carolina, West Virginia, and Washington D.C.
Catops
Catops is a genus of small carrion beetles in the family Leiodidae, subfamily Cholevinae, established by Paykull in 1798. The genus comprises approximately 16 described species distributed across the Holarctic region. Several species are associated with cave habitats, including the Iranian endemic Catops farsicus.
Catops alsiosus
Catops alsiosus is a small carrion beetle in the family Leiodidae. It has a Holarctic distribution spanning Europe, northern Asia, and North America. The species is one of approximately 60 described species in the genus Catops, which are generally associated with decomposing organic matter.
Catops americanus
Catops americanus is a species of small carrion beetle in the family Leiodidae. It is native to North America with records across the eastern and central United States and southeastern Canada. The species was described by Hatch in 1928. Like other members of the genus Catops, it is associated with carrion and decaying organic matter.
Catops davidsoni
Catops davidsoni is a species of small carrion beetle in the family Leiodidae, described by Salgado in 1999. It belongs to the genus Catops, which comprises beetles commonly associated with decaying organic matter and vertebrate remains. The species is known from scattered localities in eastern North America, with records from Canada (Ontario, Quebec) and the eastern United States.
Catops geomysi
Catops geomysi is a small carrion beetle in the family Leiodidae, described by Peck & Skelley in 2001. It belongs to the genus Catops, a group of beetles associated with decaying organic matter and small mammal burrows. The species is known from scattered records across the south-central and southeastern United States.
Catops simplex
Catops simplex is a species of small carrion beetle in the family Leiodidae, first described by Thomas Say in 1825. It belongs to the subfamily Cholevinae, a group commonly known as small carrion beetles. The species has been recorded across much of North America, with distribution records from Canada and the United States.
Catoptrichus
Catoptrichus is a genus of small carrion beetles in the family Leiodidae, subfamily Cholevinae. Members of this genus are eyeless, subterranean-adapted beetles associated with cave and soil habitats. The genus was established by Andrew Murray in 1856 and is placed in the subtribe Catopina.
Cholevinae
small carrion beetles, round fungus beetles
Cholevinae is a subfamily of small carrion beetles within the family Leiodidae (Coleoptera), containing more than 260 genera and over 1,100 described species. The subfamily includes diverse ecological groups: necrophagous species that feed on carrion and dung, mycophagous species associated with fungi, and numerous troglobitic and troglophilic lineages adapted to subterranean habitats. The tribe Leptodirini within Cholevinae represents one of the most diverse radiations of subterranean animals globally, with approximately 1,340 species and subspecies distributed from the Iberian Peninsula to Iran.
Colenis
round fungus beetles
Colenis is a genus of round fungus beetles in the family Leiodidae, first described by Erichson in 1842. The genus comprises approximately eight described species. These small beetles are classified within the subfamily Leiodinae and tribe Pseudoliodini. Distribution records indicate presence in Denmark, Norway, and Sweden.
Colenis impunctata
Colenis impunctata is a species of round fungus beetle in the family Leiodidae. It was described by John Lawrence LeConte in 1853. The species is found in North America, with documented occurrences across a wide geographic range including much of the United States and Canada. As a member of the round fungus beetles, it likely inhabits environments associated with fungal resources. The species name 'impunctata' refers to the lack of punctures or spots, suggesting a relatively smooth elytral surface compared to some congeners.
Colenis ora
Colenis ora is a species of small carrion beetle in the family Leiodidae, first described by Peck in 1998. It belongs to the subfamily Leiodinae and tribe Pseudoliodini. The species has been recorded from multiple states across the southeastern and eastern United States.
Colon dentatum
round fungus beetle
Colon dentatum is a species of round fungus beetle in the family Leiodidae, described by J.L. LeConte in 1853. The species is native to North America and has been recorded across a broad geographic range spanning eastern Canada and much of the eastern and central United States. As a member of the genus Colon, it is associated with fungal habitats, though specific ecological details remain poorly documented.
Colon hubbardi
Colon hubbardi is a species of round fungus beetle in the family Leiodidae, first described by Horn in 1880. The species occurs across North America with documented records in Canada and the United States. It belongs to the genus Colon, which comprises small beetles associated with fungal habitats. The specific epithet honors an individual named Hubbard, though the namesake is not specified in available sources.
Colon longitorsum
round fungus beetle
Colon longitorsum is a species of round fungus beetle in the family Leiodidae, first described by Peck & Stephan in 1996. It belongs to the genus Colon, a group of small beetles associated with fungal habitats. The species is known from limited records in western North America, specifically California and Oregon. As with other members of Leiodidae, it likely inhabits environments where fungal resources are available.
Colon magnicolle
Colon magnicolle is a species of round fungus beetle in the family Leiodidae, described by Mannerheim in 1853. It is distributed across northern North America, with records from Canada and the northern United States. As a member of the genus Colon, it is associated with fungal habitats, though specific ecological details for this species remain poorly documented.
Colon schwarzi
Colon schwarzi is a species of round fungus beetle in the family Leiodidae. It is known from North America, with records from Canada (Nova Scotia, Ontario, Quebec) and the United States (Arkansas, Indiana, Kansas, Kentucky, Maine, Mississippi, North Carolina, New Hampshire, Oklahoma). As a member of the genus Colon, it is likely associated with fungal habitats, though specific ecological details remain poorly documented.
Colon thoracicum
round fungus beetle
Colon thoracicum is a species of round fungus beetle in the family Leiodidae. It is found in North America, with records from Canada (Ontario, Quebec) and the United States (Alabama, District of Columbia, Illinois, Indiana, Maine, Michigan, Missouri, North Carolina, New Hampshire, Oklahoma, Pennsylvania, Virginia, West Virginia). As a member of the genus Colon, it is associated with fungal habitats.
Cyrtusa
Cyrtusa is a genus of round fungus beetles (family Leiodidae) established by Erichson in 1842. The genus contains at least two described species: Cyrtusa grossepunctata (described 1988) and Cyrtusa subtestacea (described 1813). These beetles belong to the tribe Leiodini within the subfamily Leiodinae.
Glacicavicola
Western Blind Cave Beetle
Glacicavicola is a genus of troglobitic (cave-dwelling) beetles in the family Leiodidae, endemic to caves in the western United States. The genus contains at least one described species, G. bathyscioides, which is completely eyeless and adapted to cold, humid cave environments with ice formations. These beetles exhibit specialized morphological adaptations for subterranean life, including elongated antennae and legs covered in fine setae for navigating difficult terrain.
Glacicavicola bathyscioides
Idaho Ice Cave Beetle, Western Blind Cave Beetle
Glacicavicola bathyscioides is a small, eyeless cave beetle endemic to ice caves in the western United States. It exhibits classic troglobitic adaptations including complete blindness, elongated appendages with sensory setae, and a distinctive false physogastric abdomen. The species has been documented in lava tube ice caves in Idaho and a limestone cave in Wyoming, where it inhabits humid, cold environments with ice formations. Its life cycle is poorly understood, with no larval forms observed and an estimated three-year lifespan.
Hydnobius
round fungus beetles
Hydnobius is a genus of round fungus beetles in the family Leiodidae, comprising approximately seven described species. The genus was established by Schmidt in 1841 and is classified within the tribe Sogdini. Species in this genus are small beetles associated with fungal habitats. The genus has been recorded from northern and central Europe, with distributional data available for specific species such as H. punctulatus reaching its northernmost Central European limits in Slovakia.
Hydnobius substriatus
Hydnobius substriatus is a species of round fungus beetle in the family Leiodidae, described by John Lawrence LeConte in 1863. It is distributed across northern North America, with records from Canada and the northern United States. As a member of the genus Hydnobius, it is likely associated with fungal habitats, though specific ecological details remain poorly documented.
Isoplastus
Isoplastus is a genus of small carrion beetles in the family Leiodidae, first described by Horn in 1880. The genus belongs to the tribe Leiodini within the subfamily Leiodinae. Members of this genus are part of the diverse rove beetle assemblage (Staphyliniformia), though they are not rove beetles proper. Very few species have been described, and the genus remains poorly known biologically.
Isoplastus fossor
Isoplastus fossor is a species of small carrion beetle in the family Leiodidae, first described by George Henry Horn in 1880. The species is known from eastern North America, with records extending from southern Canada through the eastern and central United States. The specific epithet 'fossor' (Latin for 'digger') suggests fossorial habits, though detailed behavioral observations remain limited. Like other members of Leiodidae, this species is likely associated with decomposing organic matter.
Kalohydnobius strigilatus
Kalohydnobius strigilatus is a species of round fungus beetle in the family Leiodidae, first described by Horn in 1880. It belongs to the tribe Sogdini within the subfamily Leiodinae. The species is documented from western North America, with records spanning from southwestern Canada through the western United States.
Leiodes
round fungus beetles
Leiodes is a genus of small, rounded beetles in the family Leiodidae, comprising at least 110 described species with a primarily Holarctic distribution. Most species are subterranean mycophages, with several species acting as economically significant pests of truffle orchards. The genus exhibits specialized morphological and behavioral adaptations for life in ephemeral and solid fungi, including unique larval structures such as pseudomycangia.
Leiodes appalachiana
Leiodes appalachiana is a species of round fungus beetle described by Baranowski in 1993. The species name references the Appalachian region, where it is primarily distributed. Like other members of the genus Leiodes, it belongs to the family Leiodidae, a group of small beetles associated with fungal habitats.