Shells of species of the genera Ampullaceana and Peregriana. A. Ampullaceana ampla (Austria, Wallersee Lake; NHMW). B. A. ampla (Germany, Neckarsteinach; NHMUK). C. A. balthica (14.12.1946, Denmark, Furesø Lake; ZMUC). D. A. balthica (Sweden, Stockholm; NMG). E. A. dipkunensis (Russia, Arkhangelsk Region, Nyandomka River; LMBI). F. A. dipkunensis, the holotype (07.07.1977, Russia, Krasnoyarsk Territory, Gornoye Lake; ZISP). G. Limneus fontinalis, the lectotype (after Forcart 1957). H. A. fontinalis (18.08.2017, Russia, Rostov Region, Veselovskoye Reservoir; LMBI). I. Limneus intermedius (France, Lyon; NHMW). J. A. lagotis (Russia, Leningrad Region, Lava River near Troitskoye; ZISP). K. A. lagotis (Austria, Bürgenland, Bodersdorf; NHMW). L. Peregriana dolgini (Russia, Republic of Buryatia, Kironskiy Spring; RMBH). M. P. peregra (France, from Draparnaud’s collection; NHMW). Scale bars: 2 mm (D–F, J, L, M), 5 mm (A–C, H, I, K). G – scale bar absent from the original publication.