Belgrandiella bumasta H. Schütt, 1960
Islamia bunarbasa (H. Schütt, 1964)
Falsibelgrandiella bunarica P. Radoman, 1973
Austropyrgus bungoniensis A. Clark, W.B. Miller& W.F. Ponder, 2003
Austropyrgus bunyaensis W.B. Miller, W.F. Ponder& K.B. Clark, 1999
Islamia burdurica Yildirim, Çaglan Kaya, Gürlek& Bahadir Koca, 2017
Islamia burduricus Yildirim, Çaglan Kaya, Gürlek& Bahadir Koca, 2017
Belgrandiella bureschi A.M. Angelov, 1976
Bythiospeum bureschi (A.J. Wagner, 1928)
Prososthenia burgersteini (FOSSIL) P.S. Pavlovic, 1931 †
Victodrobia burni W.F. Ponder & K.B. Clark,1993
Pseudamnicola buzoiensis (FOSSIL) Pana, 2003 †
Strandzhia bythinellopenia D.G. Georgiev & P. Glöer,2013
Sadleriana byzanthina (H.C. Küster, 1852)
Hydrobia caerulescens (FOSSIL) (J.F. Gmelin, 1791 †)
Pseudamnicola calamensis P. Glöer, S. Bouzid& H.D. Boeters, 2010
Hydrobia calderoni (FOSSIL) Royo Gómez, 1922 †
Bythiospeum calepii E. Pezzoli
Iglica calepii Niero & Pezzoli, 2016
Hydrobia californica G.W. Tryon, 1865
Pyrgulopsis californiensis W.O. Gregg & D.W. Taylor,1965
Radomaniola callosa (M. Paulucci, 1881)
Beddomeia camensis W.F. Ponder & K.B. Clark,1993
Alzoniella camocaensis Rolán & Boeters, 2015
Cyclothyrella candidula (FOSSIL) (M. von Neumayr, 1869 †)
Alzoniella cantabrica (H.D. Boeters, 1983)
Pseudamnicola capellinii (FOSSIL) (W.A. Wenz, 1919 †)
Micromelania capellinii (FOSSIL) W.A. Wenz, 1925 †
Pyrgula capellinii (FOSSIL) W.A. Wenz, 1919 †
Beddomeia capensis W.F. Ponder & K.B. Clark,1993
Radomaniola caputlacus (H. Schütt & R. Sesen,1993)
Socenia carasiensis (FOSSIL) E. Jekelius, 1944 †
Tanousia carasiensis (FOSSIL) (E. Jekelius, 1944 †)
Pseudamnicola carenosuturata (FOSSIL) Pana, 2005 †
Kirelia carinata P. Radoman, 1973