Lymnaea clavata (C.A. Westerlund, 1885)
Pseudosuccinea columella (T. Say, 1817)
Stagnicola contracta A. Currier, 1881
Galba cornea (FOSSIL) (A. Brongniart, 1810 †)
Corymbina coronatus (FOSSIL) (Marinescu, 1992 †)
Stagnicola corvus (J.F. Gmelin, 1791)
Lymnaea cosensis (FOSSIL) J.R. Tournouër, 1875 †
Zagrabica costulata (FOSSIL) Taner, 1974 †
Galba cousini (F.P. Jousseaume, 1887)
Radix croatica (FOSSIL) (Gorjanovic-Kramberger,1890 †)
Galba cubensis (L. Pfeiffer, 1839)
Lymnaea cucunorica O.F. von Möllendorff,1902
Radix cucuronensis (FOSSIL) (C.F. Fontannes, 1878 †)
Bullastra cumingiana (L. Pfeiffer, 1855)
Lymnaea curtacorvus N.D. Kruglov& Y.I. Starobogatov, 1984
Galba cyclostoma B. Walker, 1908
Zagrabica cyclostomopsis (FOSSIL) Š. Brusina, 1884 †
Valenciennius dacicus (FOSSIL) Pavnotescu, 1990 †
Galba dalli F.C. Baker, 1907
Lymnaea danubialis (F. von Schrank, 1803)
Valenciennius davitaschvilii (FOSSIL) Taktakishvili, 1967 †
Galba decampi L.H. Streng, 1896
Lymnaea decollata H.A. Pilsbry
Valenciennius densiplicatus (FOSSIL) (V.V. Bogachev, 1931 †)
Pectinidens diaphanus (P.P. King in P.P. King& W.J. Broderip, 1832)
Radix dilatata (FOSSIL) (Noulet, 1854 †)
Radix dilleri (FOSSIL) (M. von Neumayr, 1883 †)
Lymnaea dipkunensis Gundrizer& Y.I. Starobogatov, 1979
Lymnaea dolgini Gundrizer& Y.I. Starobogatov, 1979
Lymnaea doriana (J.R. Bourguignat, 1862)
Stagnicola draverti (A. Mozley, 1934)
Lymnaea dubrueili (FOSSIL) C.F. Fontannes, 1879 †
Lymnaea dupuyi (É.A.A. Locard, 1893)
Galba dupuyiana (FOSSIL) (Noulet, 1854 †)
Lymnaea dvoriadkini N.D. Kruglov& Y.I. Starobogatov, 1984