Pierosoma wyldi (H.B. Tristram, 1861) Guatemala
Ferrissia zambesiensis B. Walker, 1912 Zimbabwe
Ferrissia zambiensis G. Mandahl-Barth, 1968 Zambia
Anisus zelenensis L.A. Prozorova& Y.I. Starobogatov, 1997
Gyraulus zemendorfensis (Sauerzopf, 1953 )
Anisus zhirmunskii L.A. Prozorova, 2003
Gyraulus zilchianus T.C. Yen, 1939 China, Jiangsu
Planorbis zivkovici (FOSSIL) P.S. Pavlovic, 1931 †
Gyraulus zoebeleini W.R. Schlickum& F. Strauch, 1974