Gymnusa

Phylum:Arthropoda

Class:Insecta

Order:Coleoptera

Suborder:Polyphaga

Gymnusa
Gymnusa grandiceps
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Staphyliniformia
Family:	Staphylinidae
Subfamily:	Aleocharinae
Genus:	Gymnusa Gravenhorst, 1806[1]
Species[1]
†Gymnusa absens (Scudder, 1900) Gymnusa anatolica Korge, 1971 †Gymnusa antiqua A.M. Łomnicki, 1894 Gymnusa atra Casey, 1911 Gymnusa brevicollis (Paykull, 1800) Gymnusa campbelli Klimaszewski, 1979 Gymnusa grandiceps Casey, 1915 Gymnusa inexspectata Klimaszewski, 1979 Gymnusa konopackii Klimaszewski, 1979 Gymnusa lindrothi Klimaszewski & Langor, 2011 Gymnusa miyashitai Naomi, 1994 Gymnusa pseudovariegata Klimaszewski, 1979 Gymnusa smetanai Klimaszewski, 1979 Gymnusa variegata Kiesenwetter, 1845

Gymnusa is a genus of rove beetles in the subfamily Aleocharinae and tribe Gymnusini. The coloration of this genus is highly coherent, with most species black and a few dark, dark brown. They range in length from 4.2 millimeters to 6.5 millimeters.^[2]

Gymnusa live in semi-aquatic and aquatic environments, but never marine: they live in detritus in swamps, in bogs, streams, and slow-moving rivers. They live in the Nearctic and Palearctic in Europe and North America.^[2]