Nipponaphera quasilla (R.E. Petit, 1987)
Massyla rapella (FOSSIL) (A.A. Olsson, 1916 †)
Paladmete rasoarinoroae (FOSSIL) S. Kiel, 2006 †
Merica raulini (FOSSIL) (C. Mayer, 1848 †)
Microsveltia recessa T. Iredale, 1925
Admete reedii (FOSSIL) Bell, 1870 †
Admete regina W.H. Dall, 1911
Admetula regularia (FOSSIL) D.T. Dockery, 1984 †
Tritonoharpa renardi (FOSSIL) Lesport, Cluzaud& A. Verhecken, 2015 †
Cancellaria reticulata (C. Linnaeus, 1767)
Cancellaria reticulata (FOSSIL) Emmon, 1858 †
Marianarona reticulatoides (FOSSIL) (Martin, 1904 †)
Tatara revoluta (FOSSIL) (Finlay, 1924 †)
Cancellaria reyesi (FOSSIL) Covacevich& D. Frassinetti, 1986 †
Unitas rhabdota (FOSSIL) (J.F. Bayan, 1873 †)
Scalptia richardi A. Verhecken & Van Laethem,2015
Cancellaria richardpetiti E.J. Petuch, 1987
Trigonostoma ripleyana (FOSSIL) N.F. Sohl, 1964 †
Sveltia rocroii P. Bouchet & R.E. Petit,2002
Loxotaphrus rosadoi A.G. Beu & A. Verhecken,2000
Cancellaria rosea G.B. II Sowerby, 1849
Cancellaria rosewateri R.E. Petit, 1983
Narona rothi (C.G. Semper, 1861 )
Cancellaria rotunda (FOSSIL) W.H. Dall, 1892 †
Cancellaria rowelli (FOSSIL) W.H. Dall, 1896 †
Ventrilia rucksorum (FOSSIL) E.J. Petuch, 1994 †
Cancellaria rudolphi (FOSSIL) Covacevich& D. Frassinetti, 1986 †
Cancellaria rugosa (A. von Koenen, 1889)
Bivetopsia rugosa (J.B.P.A. Lamarck, 1822)
Massyla runchaena (FOSSIL) J. Gardner, 1937 †
Ventrilia sacellum (FOSSIL) R.E. Petit, 1976 †
Admete sadko G.P. Gorbunov, 1946
Plesiocerithium salax (FOSSIL) P.A. Maxwell, 1992 †
Gerdiella santa A.A. Olsson & F.M. Bayer,1973
Cancellaria sathra (FOSSIL) W.P. Woodring, 1973 †