Cominella regalis R.C. Willan, 1978
Volutopsius regularis W.H. Dall, 1873
Pareuthria regulus (R.B. Watson, 1882)
Engina resta (T. Iredale, 1940)
Metula reticularis F. Traub, 1938
Metula reticulata (FOSSIL) (L.M.D. Bellardi& O.G. Michelotti, 1840 †)
Metula reticulata (FOSSIL) Garvie, 2013 †
Chauvetia retifera (G.A. Brugnone, 1880)
Antistreptus reversus (A.W.B. Powell, 1958)
Tyrannoberingius rex (FOSSIL) Marincovich, 1981 †
Plicifusus rhyssoides W.H. Dall, 1918
Plicifusus rhyssus (W.H. Dall, 1907)
Cominella ridicula (FOSSIL) Finlay, 1926 †
Buccinulum rigidum (FOSSIL) Powell, 1929 †
Pareuthria ringei (H. Strebel, 1905)
Gemophos ringens (L.A. Reeve, 1846)
Metula roberti (FOSSIL) A.A. Olsson, 1967 †
Zelandiella robinsoni (FOSSIL) (C.A. von Zittel, 1865 †)
Siphonalia roblini (FOSSIL) J.E. Tenison-Woods,1876 †
Mohnia robusta W.H. Dall, 1913
Neptunea robusta T.A. Okutani, 1964
Chauvetia robustalba P.G. Oliver & E. Rolán,2008
Buccinulum robustum A.W.B. Powell, 1929
Burnupena rogersi (FOSSIL) B.F. Kensley & Pether,1986 †
Antistreptus rolani Z.J.A. De Castellanos,1986
Euthria rolani R. von Cosel, 1982
Editharus roncanus (FOSSIL) (A. Brongniart, 1823 †)
Buccinum rondinum W.H. Dall, 1919
Pisania rosadoi L. Bozzetti & M. Ferrario,2005
Retifusus roseus (W.H. Dall, 1877)
Monostiolum rosewateri G.T. Watters & C.J. Finlay,1989
Buccinum rossellinum W.H. Dall, 1919
Proneptunea rossiana (R.K. Dell, 1990)
Buccinum rossicum W.H. Dall, 1907
Pisania rostrata (FOSSIL) R. Tate, 1888 †