Discopsis similis E. Rolán & F. Rubio, 2002
Teinostoma simplex (FOSSIL) É.A. Benoist, 1874 †
Anticlimax simplex F. Rubio & E. Rolán, 2014
Anticlimax simplicissima F. Rubio & E. Rolán, 2014
Anticlimax simulans F. Rubio & E. Rolán, 2014
Monodosus simulans F. Rubio & E. Rolán, 2016
Tornus sincera W.H. Dall, 1890
Tornus sinensis A. Adams, 1861
Anticlimax singularis F. Rubio & E. Rolán, 2014
Scrupus sinuatus (FOSSIL) C.R. Laws, 1940 †
Tornus sinuosus (FOSSIL) P. Lozouet, 1998 †
Ponderinella skeneoides E. Rolán & F. Rubio, 2002
Idioraphe smikron (FOSSIL) Gardner, 1948 †
Circulus smithi K.J. Bush, 1897
Vitrinella smithi P. Bartsch, 1927
Vitrinella solaris F. Rubio, R. Fernández-Garcés& E. Rolán, 2011
Woodringilla solida (C.F. Laseron, 1954)
Callodix solida C.F. Laseron, 1954
Teinostoma solidum (W.H. Dall, 1889)
Teinostoma solidum E.A. Smith, 1872
Solariorbis solidus F. Rubio, R. Fernández-Garcés& E. Rolán, 2011
Anticlimax solomonensis F. Rubio & E. Rolán, 2014
Circuitus solomonensis Rubio & Rolán, 2017
Tuberes solomonensis Rubio & Rolán, 2017
Teinostoma soror H.A. Pilsbry & A.A. Olsson,1945
Circulus soyoae (T. Habe, 1961)
Pseudoliotia speciosa (G.F. Angas, 1871)
Teinostoma spermatia (FOSSIL) W.P. Woodring, 1970 †
Cyclostremiscus spiceri (F.C. Baker, G.D. Hanna& A.M. Strong, 1938)
Anticlimax spiralis F. Rubio & E. Rolán, 2014
Cyclostremiscus spiritualis (F.C. Baker, G.D. Hanna& A.M. Strong, 1938)
Circulus spirorbis (FOSSIL) (J.B.P.A. Lamarck,1804 †)
Teinostoma squiresi (FOSSIL) Perrilliat, 2013 †
Vitrinella stearnsi P. Bartsch, 1907
Teinostoma stemonium (FOSSIL) W.P. Woodring, 1957 †