Cerion ritchiei (C.J. Maynard, 1894) Bahamas28 mm
Cerion ritchiei gigantea (C.J. Maynard, 1894) Bahamas32 mm
Cerion ritchiei grayi (C.J. Maynard, 1894) Bahamas28 mm
Cerion ritchiei vannostrandi H.A. Pilsbry& E.G. Vanatta, 1896 Bahamas30 mm
Cerion robusta C.J. Maynard, 1894 Bahamas28 mm
Cerion rodrigoi S.J. Gould, 1997 Caribbean
Cerion romanoensis C.G. Aguayo& M.I. Sánchez Roig, 1953 Caribbean
Strophiops rosacea C.J. Maynard& W.F. Clapp, 1921 Bahamas
Cerion royi C.G. Aguayo & M.L. Jaume,1951 Cuba
Cerion rubicundum K.T. Menke, 1829 Bahamas
Strophiops rubiginosa C.J. Maynard& W.F. Clapp, 1921 Bahamas
Cerion rubra (G. Humphrey, 1787) Caribbean
Cerion rude (L. Pfeiffer, 1855)
Strophiops rufimaculata C.J. Maynard, 1913 Bahamas
Cerion rufina (C.J. Maynard, 1913) Bahamas25 mm
Cerion rufolabris H.H. Beck, 1837 Caribbean
Strophiops rufula C.J. Maynard, 1924 Bahamas
Strophiops russelli W.J. Clench, 1938 Bahamas
Cerion saetiae M.I. Sánchez Roig, 1948 Cuba
Cerion sagraianum (L. Pfeiffer, 1847) Cuba38,3 mm
Cerion sainthilarius M.I. Sánchez Roig, 1951 Cuba
Cerion salinaria (C.J. Maynard, 1913) Bahamas30,3 mm
Cerion salvatori C. de la Torre in H.A. Pilsbry, 1927 Cuba29 mm
Cerion sama W.J. Clench & C.G. Aguayo Caribbean
Strophiops sampsoni C.J. Maynard& W.F. Clapp, 1920 Bahamas
Cerion sanchezi W.J. Clench& C.G. Aguayo, 1953 Caribbean
Cerion sanctacruzense C.G. Aguayo & M.L. Jaume,1951 Cuba
Cerion sanctamariae C.G. Aguayo & M.L. Jaume,1951 Cuba
Strophiops santesoni C.J. Maynard, 1920 Bahamas
Cerion sanzi Blanes in H.A. Pilsbry& E.G. Vanatta, 1898 Cuba
Cerion sarcostoma H.A. Pilsbry & Vannata,1896 Bahamas
Cerion saugeti C.G. Aguayo & M.L. Jaume,1951 Caribbean
Strophiops saurodon W.H. Dall, 1905 Caribbean
Strophiops saxitina C.J. Maynard& W.F. Clapp, 1921 Bahamas
Strophiops scalarinoides H.P. Plate, 1907 Caribbean