Opisthosiphon pupoides velazquezi C. de la Torre& P. Bartsch, 1941 Cuba15,4 mm
Tropidophora pyrostoma (G.B. Sowerby, 1843) Madagascar
Parachondria pyrostoma H.A. Pilsbry, 1930 Colombia, San Andres and Providencia
Hispanipoma quaternatum (J.B.P.A. Lamarck) Haiti
Opisthosiphon quesadai C.G. Aguayo, 1932 Cuba
Opisthosiphon quinti C. de la Torre& P. Bartsch, 1941 Cuba
Chondropoma quisquense P. Bartsch, 1946 Dominican Republic11 mm
Chondropoma quisquense sculptior P. Bartsch, 1946 Dominican Republic11 mm
Dioscopoma radiolatum (E.C. Von Martens, 1881) Yemen, Socotra12 mm
Choanopoma radiosum (P.M.A. Morelet, 1849) Guatemala
Annularisca ramsdeni (H.A. Pilsbry& J. Henderson, 1912) Cuba
Tudorina rangelina (F. Poey, 1851) Cuba
Cyclostoma rangii A.E.J. Férussac, 1827 Réunion
Pomatias raricosta (T.V. Wollaston, 1878) Canary Islands
Cistulops raveni (J.C.H. Crosse, 1872) Curacao
Chondropoma rawsoni L. Pfeiffer, 1867 Bahamas
Opisthosiphon rayi C. de la Torre & P. Bartsch, Cuba
Wrightudora recta (J. Gundlach in L. Pfeiffer, 1863) Cuba
Colobostylus redfieldianus (C.B. Adams) Jamaica
Colobostylus redfieldianus magnitesta (H.B. Baker, 1934) Jamaica15,4 mm
Tropidophora reesi E. Fischer-Piette, 1949 Madagascar
Chondrothyretes reticulata (C. de la Torre& P. Bartsch, 1938) Cuba
Chondrothyretes reticulata costanerensis (C. de la Torre& P. Bartsch, 1938) Cuba24 mm
Chondrothyretes reticulata fratercula (C. de la Torre& P. Bartsch, 1938) Cuba20 mm
Chondrothyretes reticulata saccharinella (C. de la Torre& P. Bartsch, 1938) Cuba17,4 mm
Chondrothyretes reticulata scrobiculata (C. de la Torre& P. Bartsch, 1938) Cuba26 mm
Tropidophora reticulata A. Adams & L.A. Reeve,1850 Madagascar, Diego Suarez23 mm
Chondropoma retreatense H.B. Baker, 1934 Jamaica
Annularia retrorsa C.B. Adams, 1850 Jamaica
Chondropoma revinctum (F. Poey, 1851) Bahamas14,2 mm
Chondropoma revocatum (J. Gundlach in L. Pfeiffer, 1857) Cuba
Georgia revoili J.R. Bourguignat, 1882 Somalia
Meganipha rhecta F.G. Thompson, 1978 Dominican Republic11 mm
Choanopoma rigidulum (P.M.A. Morelet, 1851) Belize
Parachondria riisei (L. Pfeiffer, 1852) Puerto Rico13,8 mm