Arganiella wolfi (P. Glöer & H.D. Boeters,2007)
Iglica wolfischeri A. Reischütz& P.L. Reischütz, 2004
Austropyrgus wombeyanensis A. Clark, W.B. Miller& W.F. Ponder, 2003
Pyrgulopsis wongi R. Hershler, 1989
Fluvidona woodsii W.F. Petterd, 1889
Bythiospeum wuestianum (D. Uhl, 1938)
Trochispira wyomingensis (FOSSIL) T.C. Yen, 1954 †
Iglica xhuxhi A. Reischütz, N. Reischütz& P.L. Reischütz, 2014
Balkanica yankovi D.G. Georgiev, 2011
Akiyoshia yunnanensis (Y.Y. Liu, Y.X. Wang& W.Z. Zhang, 1982)
Sulawesidrobia yunusi S. Zielske, M. Glaubrecht& M. Haase, 2011
Kerchia yurkynensis (FOSSIL) K. Bandel, 2010 †
Belgrandiella zagoraensis P. Glöer & D.G. Georgiev,2009
Intermaria zagrosensis (P. Glöer & V.M. Pešic,2009)
Micromelania zalaensis (FOSSIL) Strausz, 1940 †
Cavernisa zaschevi (A.M. Angelov, 1959)
Beddomeia zeehanensis W.F. Ponder & K.B. Clark,1993
Austropyrgus zeidleri A. Clark, W.B. Miller& W.F. Ponder, 2003
Wolfgangia zeidleri W.F. Ponder, R. Hershler& B.W. Jenkins, 1989
Jardinella zeidlerorum W.F. Ponder & K.B. Clark,1990
Belgrandiella zermanica P. Radoman, 1973
Islamia zermanica P. Radoman, 1973
Vinodolia zetaevallis (P. Radoman, 1973)
Plagigeyeria zetaprotogona H. Schütt, 1960
Belgrandia zilchi F. Settepassi, 1965
Pyrgorientalia zilchi (H. Schütt, 1964)
Nematurella zilchi (FOSSIL) W.R. Schlickum, 1960 †
Micromelania zitteli (FOSSIL) (Schwartz von Mohrenstern, 1864 †)
Prososthenia zitteli (FOSSIL) Lörenthey, 1902 †
Belgrandia zlatae (FOSSIL) D. Esu & O. Girotti,2016 †
Nematurella zoebeleini (FOSSIL) W.R. Schlickum, 1960 †
Bythiospeum zollerianum (D. Geyer, 1905)
Pseudamnicola zonata (FOSSIL) (K.E.I. von Eichwald,1853 †)
Mercuria zopissa (M. Paulucci, 1882)
Tanousia zrmanjae (Š. Brusina, 1866)