Drymaeus spectatus (L.A. Reeve, 1849) Colombia39,2 mm
Bostryx spiculatus P.M.A. Morelet, 1860 Peru, Cuzco19 mm
Bostryx spiculatus paucicostatus A.S.H. Breure, 1978 Peru, Cuzco14 mm
Bostryx spiculatus pectinatus W.H. Dall, 1912 Peru, Ollantaytambo21 mm
Naesiotus spirifer W.M. Gabb, 1868 Mexico, Baja California Sur, La Paz
Bulimulus sporadicus (A.V.M.D. D'Orbigny,1835) Argentina, Cordoba21,7 mm
Naesiotus steadmani L.A. Chambers, 1986
Scutalus steerei H.A. Pilsbry, 1900 Peru, Cajamarca
Bostryx stelzneri A. Doering, 1879 Argentina, San Luis Province23,3 mm
Bostryx stelzneri conispirus (A. Doering, 1879) Argentina
Bostryx stelzneri hector E.L. Holmberg, 1919 Argentina26 mm
Bostryx stelzneri peristomatus A. Doering, 1879 Argentina, San Luis Province24,2 mm
Naesiotus stenogyroides (R.J.L. Guppy, 1868) Dominica
Drymaeus steyermarki (F. Haas, 1955) Venezuela
Drymaeus stigmaticus R.A. Philippi, 1867 Peru
Bulimulus stilbe H.A. Pilsbry, 1901 Brazil, Sao Paulo
Mesembrinus stramineus (L. Guilding, 1828) Ecuador18,6 mm
Bulimus striatulus (FOSSIL) J.B.P.A. Lamarck, 1804 † France, Grignon
Bostryx striatus (P.P. King, 1832) Peru
Drymaeus strigatus (G.B. I Sowerby, 1833) Peru, Huallaga24,6 mm
Drymaeus strigatus saccatus (L. Pfeiffer, 1855) Peru
Bostryx strobeli J.J. Parodíz, 1956 Argentina
Auris struthiolaris K.T. Menke, 1830 South America
Mesembrinus studeri (L. Pfeiffer, 1847) Colombia25 mm
Bostryx styliger (H.H. Beck, 1837) South America
Bostryx subcactorum H.A. Pilsbry, 1896 Chile, Antofagasta
Naesiotus subcostatus (F. Haas, 1948) Cajamarca, Peru
Naesiotus subcostatus chamayensis W.K. Weyrauch, 1967 Cajamarca, Peru11 mm
Drymaeus subeffusus R.A. Philippi, 1869 Peru
Bostryx subelatus F. Haas, 1948 Peru, Huanuco
Drymaeus subhybridus S.I. Da Costa, 1906 Peru49,1 mm
Drymaeus subinterruptus L. Pfeiffer, 1853 Bolivia36,7 mm
Drymaeus subpellucidus (E.A. Smith, 1877) Ecuador20 mm
Drymaeus subsemiclausus (S.A.A. Petit De La Saussaye, 1843) Colombia, Quindin22,5 mm
Drymaeus subsimilaris H.A. Pilsbry, 1898 Colombia, Valdivia