Caspia complementia (FOSSIL) V.V. Anistratenko& Gozhik, 1995 †
Reesidella concentrica (FOSSIL) Pan, 1980 †
Iglica concii (Allegretti, 1944)
Pyrgula concinna B.M. Logvinenko& Y.I. Starobogatov, 1968
Pseudamnicola confinis (K. Brancsik, 1897)
Saccoia congermana (FOSSIL) (C.F. Fontannes, 1881 †)
Graecoanatolica conica P. Radoman, 1973
Peringia conica (FOSSIL) (C. Prevost, 1821 †)
Pyrgulopsis conica R. Hershler, 1988
Spilochlamys conica F.G. Thompson, 1968
Pyrgula conica (FOSSIL) Taner, 1974 †
Caspiohydrobia conica (B.M. Logvinenko& Y.I. Starobogatov, 1968)
Lutetiella conica (FOSSIL) (Prévost, 1821 †)
Austropyrgus conicus A. Clark, W.B. Miller& W.F. Ponder, 2003
Caspiohydrobia coniformis Y.I. Starobogatov& Z.I. Izzatullaev, 1974
Belgrandia conoidea (P. de Reyniés, 1844)
Peringia conoidea (FOSSIL) (A. von Koenen, 1883 †)
Pseudamnicola conovula (G.R. von Frauenfeld,1863)
Pseudamnicola constantinae (A. Letourneux, 1870)
Peringia contracta (FOSSIL) A.E.M. Cossmann, 1888 †
Tournoueria conulus (FOSSIL) Š. Brusina 1870 †
Turricaspia conus (K.E.I. von Eichwald,1838)
Pseudamnicola convexa (FOSSIL) (C.L.F. von Sandberger,1875 †)
Pseudamnicola convexa (FOSSIL) (F. Gottschick, 1928 †)
Caspiohydrobia convexa (B.M. Logvinenko& Y.I. Starobogatov, 1966)
Nematurella convexula (FOSSIL) W.R. Schlickum& F. Strauch, 1967 †
Colligyrus convexus R. Hershler, T.J. Frest, H.P. Liu,& E.J. Johannes, 2003
Austropyrgus cooma (T. Iredale, 1943)
Bythiospeum copiosum (A.M. Angelov, 1972)
Clessiniola cordovana (L. Pfeiffer, 1855)
Jardinella coreena W.F. Ponder & K.B. Clark,1990
Islamia corinthica (FOSSIL) D. Esu & O. Girotti,2015 †
Hydrobia cornea (A. Risso, 1826)
Alzoniella cornucopia (C. De Stefani, 1880)
Neohoratia coronadoi (J.R. Bourguignat, 1870)