Anculosa fusca Haldeman, 1841

This species was described from “ Oregon ” in the genus Anculosa Say, 1821, a junior synonym of Leptoxis Rafinesque, 1819 (Pleuroceridae), where it was retained by Brot (1862, 1868). It was included by Graf (2001) but from early on (e.g., Cooper 1867) was recognized to belong to the genus Fluminicola, where it remains today (Hershler & Frest 1996). It was omitted by Frest & Johannes (2010).