The Palaearctic species of Emplenota Casey, Polystomota Casey, Triochara Bernhauer and Skenochara Bernhauer & Scheerpeltz, with descriptions of three new species (Coleoptera, Staphylinidae, Aleocharinae).

Abstract

The Palaearctic members of the seashore-dwelling taxa Emplenota Casey, Polystomota Casey, Triochara Bernhauer and Skenochara Bernhauer & Scheerpeltz of the Aleochara-complex are treated. Special emphasis is placed on the lesser known Eastern Palaearctic species, whose types were revised, and on the Western Palaearctic E. albopila (Muls. & Rey). Lectotypes are designated for Aleochara squalithorax Sharp, A. fucicola Sharp, A. trisulcata Weise and Homalota variolosa Weise. H. variolosa Weise is regarded as a junior synonym of Aleochara fucicola Sharp. Three new species are described: Emplenota puetzi n. sp. (Russian Far East), Triochara zerchei n. sp. (Sakhalin, Primorskiy Kray) and T. nubis n. sp. (Kamchatka, Sakhalin). - Diagnostic keys allowing identification and pointing out systematically relevant characters are supplemented by illustrations of the genitalia and the sclerites of urite VIII and by notes on taxonomy, distribution, ecology and phylogenetic relationships.

Nomenclatural Acts

albopila (Mulsant & Rey, 1852) (Emplenota), comb. n. hitherto Homalota albopila
fucicola (Sharp, 1874) (Emplenota), Lectotype described as Aleochara fucicola
puetzi Assing, 1995 (Emplenota), spec. n.
variolosa Weise, 1877 (Homalota), Lectotype; syn. n. of Emplenota fucicola (Sharp, 1874)
squalithorax (Sharp, 1888) (Skenochara), Lectotype described as Aleochara squalithorax
nubis Assing, 1995 (Triochara), spec. n.
trisulcata (Weise, 1877) (Triochara), Lectotype described as Aleochara trisulcata
zerchei Assing, 1995 (Triochara), spec. n.