Acrotona pilosicollis (Brundin, 1952) (Coleoptera, Staphylinidae) – description of female and notes on biology

Abstract

Acrotona pilosicollis (Brundin, 1952) is a poorly known staphylinid species. Only two records exist from NE Europe after it was described in 1952. Here we report 97 individuals caught in pitfall traps in a dry meadow in eastern Finland in 2017. The species is similar to A. exigua (Erichson, 1837) but may be distinguished both on genital and external characters. The diagnostic spermatheca of the previously unknown female is described. On the basis of the new finds in Finland, A. pilosicollis is considered to be a stenotypic species of dry xerothermic meadows.