Iglica relicta (L. Kušcer, 1937)
Pyrgula reljkovici (FOSSIL) Š. Brusina, 1902 †
Prososthenia reticulata (FOSSIL) Burgerstein, 1877 †
Bythiospeum rhenanum (R. Lais, 1935)
Hydrobia rheophila J.C. Bequaert & W.J. Clench,1936
Hydrobia rhodiensis (FOSSIL) J.R. Tournouër in Fischer,1877 †
Rhodopyrgula rhodiensis (FOSSIL) (Bukowski, 1896 †)
Radomaniola rhodopensis P. Glöer & D.G. Georgiev,2009
Phrantela richardsoni W.F. Ponder & K.B. Clark,1993
Goniochilus rissoina (FOSSIL) (Š. Brusina, 1878 †)
Prososthenia ristici (FOSSIL) P.S. Pavlovic, 1927 †
Fluviopupa riva S. Zielske & M. Haase,2014
Avenionia roberti H.D. Boeters, 1967
Sadleriana robici (S. Clessin, 1890)
Belgrandiella robusta P. Radoman, 1975
Plagigeyeria robusta H. Schütt, 1959
Pyrgulopsis robusta B. Walker, 1908
Socenia robusta (FOSSIL) (Roshka, 1973 †)
Bythiospeum roesleri (D. Geyer, 1904)
Belgrandiella rolani (H.D. Boeters, 1986)
Tarraconia rolani M.A. Ramos, B. Arconada& D. Moreno, 2000
Mercuria rolani P. Glöer, H.D. Boeters& Walther, 2015
Hydrobia romani (FOSSIL) Royo Gómez, 1922 †
Beddomeia ronaldi W.F. Ponder & K.B. Clark,1993
Tournouerina ronaldi (FOSSIL) D. Esu & O. Girotti,2015 †
Austropyrgus ronkershawi A. Clark, W.B. Miller& W.F. Ponder, 2003
Hydrobia rossii (FOSSIL) Š. Brusina, 1878 †
Pyrgulopsis roswellensis D.W. Taylor, 1987
Ohridohauffenia rotonda (P. Radoman, 1964)
Phreatodrobia rotunda R. Hershler & A.J. Longley,1986
Pseudamnicola rotundata (FOSSIL) (Du Bois de Montpéreux,1831 †)
Pseudamnicola rouagi P. Glöer, S. Bouzid& H.D. Boeters, 2010
Bythiospeum rougemonti (S. Clessin, 1882)
Hydrobia royoi (FOSSIL) Robles & Goy, 1972 †
Leiorhagium ruali M. Haase & P. Bouchet,1998