Abstract

A faunistic review on three widespread species of the genus Acidota Stephens, 1829 of Russia is presented: A. crenata (Fabricius, 1792), A. cruentata Mannerheim, 1830, and A. quadrata (Zetterstedt, 1839). A new synonymy is proposed: A. crenata = A. crenata japonica Watanabe, 1990 syn. nov. Faunistic and bionomical data for these species are summarized, and distributional maps for the Palaearctic Region are provided. The eastern borders of the distribution range of A. cruentata are clarified and previous records east of West Siberia are not confirmed. Images of habitus and aedeagi, and a key to the Acidota species of Russia are provided. All these species of Acidota are recorded for the first time from certain area:  A. crenata from Khabarovsk Territory, Armenia and Uzbekistan, A. cruentata from Novosibirsk Area, and A. quadrata from Sverdlovsk Area, Tuva, Chita Area and Khabarovsk Territory. Key words: Coleoptera, Staphylinidae, Omaliinae, Acidota, fauna, distribution, taxonomy, synonymy, Palaearctic Region, Russia