Omaliinae
Guides
Omalium
Omalium is a genus of ocellate rove beetles (Staphylinidae: Omaliinae) containing at least 70 described species distributed across the Holarctic region. The genus has been subject to extensive taxonomic revision, with species organized into morphologically-based species groups including the Acutangulum, Amplissimum, Caesum, Oxyacanthae, and Rivulare groups. Recent revisions have described numerous new species from the Himalayan region, China, Siberia, and the Far East.
Omalium rivulare
Omalium rivulare is a Holarctic ocellate rove beetle in the family Staphylinidae. Originally described as Staphylinus rivularis by Paykull in 1789, it serves as the type species for the Rivulare species group within the genus Omalium. The species has been recorded across Europe, northern Asia, and has been introduced to North America. Synonymy with O. kabakovi was established in 2025.
Omalonomus relictus
Omalonomus relictus is a rove beetle species in the family Staphylinidae, described by Campbell and Peck in 1990. The species has been recorded from western Canada (Alberta, Saskatchewan) and the northwestern United States (Utah, Washington). As a member of the subfamily Omaliinae, it belongs to a group of rove beetles often associated with forest floor habitats and decaying organic matter.
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.
Orochares
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
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.
Pelecomalium
Pelecomalium is a genus of ocellate rove beetles (family Staphylinidae) established by Casey in 1886. The genus belongs to the subfamily Omaliinae and tribe Anthophagini. At least three species have been described: P. laevicolle, P. puberulum, and P. testaceum. Members of this genus possess ocelli, a characteristic feature distinguishing them within the rove beetles.
Phlaeopterus
Phlaeopterus is a genus of omaliine rove beetles containing 22 species distributed across northwestern North America and eastern Asia. The genus exhibits notable evolutionary transitions in body size, with two independent origins of large-bodied adults (exceeding 5 mm) from a small-bodied common ancestor. Large-bodied species are exclusively associated with alpine snowfield habitats, though statistical support for this correlation remains unconfirmed. The genus is monophyletic based on combined molecular and morphological phylogenetic analyses.
Phlaeopterus cavicollis
Phlaeopterus cavicollis is a rove beetle in the subfamily Omaliinae, first described from the Pacific Northwest region. The species is associated with cool, moist montane and coastal environments across western North America. It belongs to a genus characterized by compact body forms and association with forest floor habitats. Available records suggest it occupies a relatively narrow geographic range compared to some congeners.
Phloeonomus
Protea Rove Beetles
Phloeonomus is a genus of ocellate rove beetles in the family Staphylinidae, subfamily Omaliinae, containing approximately eight described species. Species within this genus are obligate saproxylic beetles associated with decaying wood and polypore fungi. The larval stages have been characterized for at least one species (P. punctipennis), showing three instars with morphological differences in antennal, leg, and urogomphal proportions between early and late instars.
Phloeonomus suffusus
Phloeonomus suffusus is a species of rove beetle in the family Staphylinidae, subfamily Omaliinae. It is documented from coastal regions of western North America, including British Columbia, Alaska, Washington, Oregon, and California. Like other members of its genus, it is likely associated with decaying plant matter and fungal habitats in moist forest environments. The species was described by Casey in 1893.
Phloeostiba
Phloeostiba is a genus of rove beetles in the family Staphylinidae, subfamily Omaliinae. The genus was established by C.G. Thomson in 1858. Species are distributed across Eurasia, Australia, and North America, with confirmed records from Denmark, Norway, and Sweden. The genus includes at least two described species: Phloeostiba azorica and Phloeostiba kamijoi.
Phyllodrepa punctiventris
Phyllodrepa punctiventris is a rove beetle (Staphylinidae) in the subfamily Omaliinae. It is a small beetle with limited published information on its biology. The species has been recorded from eastern North America, with distribution records spanning from Ontario, Canada south to Georgia and west to Oklahoma.
Pycnoglypta campbelli
A small rove beetle in the subfamily Omaliinae, described from North American material in 1995. Known from scattered records across boreal and temperate regions of Canada and the northern United States. The genus Pycnoglypta contains few species and is characterized by compact body form and distinctive mouthpart structures.
Pycnoglypta fracta
Pycnoglypta fracta is a species of rove beetle in the family Staphylinidae, subfamily Omaliinae. It belongs to the tribe Omaliini, a group of small to medium-sized beetles commonly associated with decaying organic matter and forest floor habitats. The genus Pycnoglypta is part of the diverse staphylinid fauna of North America.
Subhaida
Subhaida is a genus of rove beetles (Staphylinidae) in the subfamily Omaliinae. It was described by Hatch in 1957 and is classified within the tribe Coryphiini and subtribe Coryphiina. The genus contains species found in western North America, particularly in the Pacific coastal region. Members of this genus are small to medium-sized beetles associated with forest floor habitats.
Subhaida ingrata
Subhaida ingrata is a species of rove beetle in the family Staphylinidae, originally described as Pseudohaida ingrata by Hatch in 1957. The species belongs to the subfamily Omaliinae and tribe Coryphiini. It has been documented from western North America, including the Pacific coast and adjacent interior regions.
Trigonodemus
Trigonodemus is a genus of rove beetles (Staphylinidae) in the subfamily Omaliinae, tribe Anthophagini. It was established by John Lawrence LeConte in 1863. The genus is rarely encountered, with minimal published documentation and few observational records.
Trigonodemus fasciatus
Trigonodemus fasciatus is a species of rove beetle in the family Staphylinidae, subfamily Omaliinae. It was described by Leech in 1939. The species is known from limited distributional records in western North America, specifically British Columbia, Canada and Oregon, USA. As a member of the Omaliinae, it likely inhabits moist, decaying organic matter environments typical of this subfamily, though specific ecological details remain poorly documented.
Unamis
Unamis is a genus of rove beetles in the family Staphylinidae, subfamily Omaliinae, containing approximately seven described species. The genus is native to western North America, with species distributed across British Columbia, California, Idaho, Oregon, and Washington. It was established by Casey in 1893.
Xenicopoda
Xenicopoda is a genus of rove beetles (family Staphylinidae) in the tribe Anthophagini. It is monotypic, containing only the single species Xenicopoda helenae, which is known from California. The genus was established by Moore and Legner in 1971.
Xenicopoda helenae
Xenicopoda helenae is a species of rove beetle (Staphylinidae) described from California in 1971. It belongs to the subfamily Omaliinae, a group of rove beetles often associated with decaying plant matter and fungal habitats. The species is known from limited collection records in California.