Bulimus raymondi J.R. Bourguignat, 1863 Lake Tanganyika87,9 mm
Drymaeus recedens (L. Pfeiffer, 1864) Peru27,3 mm
Mesembrinus recluzianus (L. Pfeiffer, 1847) Chiapas, Mexico22,3 mm
Mesembrinus rectilinearis (L. Pfeiffer, 1855) Peru, Tarapoto23,9 mm
Bostryx reedi J.J. Parodíz, 1947 Argentina
Bostryx reentsi R.A. Philippi, 1851 Peru, Lima22 mm
Bulimulus regina (T.E. Bowdich ex A.E.J. Férussac, 1822) French Guiana78,6 mm
Drymaeus regularis H.C. Fulton, 1905 Peru28,33 mm
Elatibostryx rehderi W.K. Weyrauch, 1960 Peru, Lima10,45 mm
Drymaeus rehderi J.J. Parodíz, 1962 Chile, Valdivia
Naesiotus reibischii W.H. Dall, 1895 Galapagos10 mm
Scutalus revinctus L.H. Hupé, 1857 Chile23 mm
Drymaeus rex A.S.H. Breure, 2009
Naesiotus rhabdotus F. Haas, 1951 Peru
Drymaeus rhoadsi H.A. Pilsbry, 1932 Ecuador
Peronaeus rhodacme (L. Pfeiffer, 1842) Chile, Vallenar13,1 mm
Bostryx rhodolarynx (L.A. Reeve, 1849) Peru, Lambayeque34,5 mm
Bostryx rhodolarynx apurimacensis W.H. Dall, 1917 Peru, Apurimac
Bostryx rhodolarynx papillatus (P.M.A. Morelet, 1860) Peru22,7 mm
Auris rhodospira V.L.V. Potiez& A. Michaud, 1835 Brazil
Bulimulus riisei L. Pfeiffer, 1855 Saint Croix16 mm
Naesiotus rimatus (L. Pfeiffer, 1847) Mexico, Acapulco33,1 mm
Naesiotus rivasii (A.V.M.D. D'Orbigny,1837) Bolivia, Santa Cruz12 mm
Naesiotus rocayanus (A.V.M.D. D'Orbigny,1835) Bolivia, Santa Cruz22,9 mm
Bostryx rodriguezae W.K. Weyrauch, 1967 Peru, Lima23 mm
Drymaeus rosalbus H.A. Pilsbry, 1932 Peru, Chanchamayo
Mesembrinus roseatus (L.A. Reeve, 1848) Venezuela35,6 mm
Drymaeus rosenbergi S.I. Da Costa, 1906 Peru19 mm
Lissoacme rouaulti (L.H. Hupé, 1857) Chile, Coquimbo
Bostryx rubescens L.A. Reeve, 1848 South America
Drymaeus rubrovariegatus H.C. Higgins, 1868 Peru32,8 mm
Mesembrinus rudis (H.E. Anton, 1839) Oaxaca, Mexico
Bostryx rudisculptus J.J. Parodíz, 1956 Argentina
Mesembrinus rufescens (J.E. Gray, 1825) Jamaica24,2 mm
Drymaeus rufolineatus H. Drouët, 1859 French Guyana