A proposed neotype for Hydrobia acuta (Draparnaud, 1805)

A lectotype for Hydrobia acuta (Draparnaud, 1805) was selected by Boeters (1984) from two syntypes found at the Museum National d’Histoire Naturelle in Paris. Although they are here demonstrated to belong to two different species, the type designation is valid and, if accepted, H. acuta becomes a junior synonym of H. ventrosa (Montagu, 1803). In order to conserve the current understanding of H. acuta, an application has been submitted to the ICZN to set aside the type designation of Boeters (1984) and to designate a neotype in line with the earlier and more widely accepted usage of the name.