Naesiotus rugatinus W.H. Dall, 1917
Naesiotus rugiferus (G.B. I Sowerby, 1833)
Drymaeus rugistriatus F. Haas, 1952
Drymaeus rugosa (A. Valenciennes, 1827)
Naesiotus rugulosus (G.B. I Sowerby, 1838)
Naesiotus rugulosus planospira C.M.F. Ancey, 1887
Kora rupestris R.B. Salvador& L.R.L. Simone, 2016
Bulimulus rushii H.A. Pilsbry
Bostryx rusticellus (P.M.A. Morelet, 1860)
Drymaeus sachsei J.A. Albers, 1854
Naesiotus saeronius W.H. Dall, 1917
Bostryx sagasteguii F. Haas, 1966
Drymaeus sallei H.A. Pilsbry, 1899
Drymaeus sallei haitensis H.A. Pilsbry, 1899
Vermiculatus sanborni (F. Haas, 1947)
Drymaeus sanctaemarthae H.A. Pilsbry, 1901
Bostryx sandwicensis (L. Pfeiffer, 1846)
Rabdotus sanmarcoensis H.A. Pilsbry & H.N. Lowe,1932
Bulimulus sarcodes L. Pfeiffer, 1846
Mesembrinus sargi J.C.H. Crosse& P.H. Fischer, 1875
Peronaeus scabiosus (G.B. I Sowerby, 1833)
Bostryx scalaricosta P.M.A. Morelet, 1860
Bostryx scalariformis (W.J. Broderip, 1832)
Naesiotus scalesiana A.G. Smith, 1972
Rabdotus schiedeanus (L. Pfeiffer, 1841)
Rabdotus schiedeanus pecosensis H.A. Pilsbry & J.H. Ferriss,1897
Drymaeus schmidti (L. Pfeiffer, 1854)
Drymaeus schunkei F. Haas, 1949
Drymaeus scitulus (L.A. Reeve, 1849)
Drymaeus scitulus cochambalensis W.K. Weyrauch, 1916
Drymaeus scolioides P. Dautzenberg, 1901
Bostryx scotophilus W.K. Weyrauch, 1967
Naesiotus sculpturatus (L. Pfeiffer, 1846)
Bostryx scutulatus (W.J. Broderip, 1832)
Drymaeus selli (H.B. Preston, 1909)