Helminthochiton riddlei (FOSSIL) Frederickson, 1962 †
Leptochiton rissoi (H.F. Nierstrasz, 1905)
Leptochiton rogeri J.D. Sigwart & B.I. Sirenko,2015
Parachiton ronaldi (P. Kaas & R.A. Van Belle,1985)
Leptochiton rugatus (P.P. Carpenterin H.A. Pilsbry, 1892)
Leptochiton saitoi B.I. Sirenko, 2001
Leptochiton samadiae J.D. Sigwart & B.I. Sirenko,2012
Leptochiton sanmatiensis Güller, Liuzzi& D.G. Zelaya, 2015
Leptochiton sarsi P. Kaas, 1981
Leptochiton scabridus (J.G. Jeffreys, 1880)
Leptochiton schwabei J.D. Sigwart & B.I. Sirenko,2012
Leptochiton seishinmaruae H. Saito, 1997
Pilsbryella setigera (H.F. Nierstrasz, 1905)
Leptochiton shapovalovi (FOSSIL) B.I. Sirenko, 2013 †
Parachiton shinyomaruae H. Saito, 1996
Leptochiton sibiricus (FOSSIL) (Shurygin, 2001 †)
Leptochiton sigwartae B.I. Sirenko, 2015
Helminthochiton simplex (FOSSIL) W.J. Raymond, 1910 †
Deshayesiella sinica (F.S. Xu, 1990)
Deshayesiella sirenkoi H. Saito, K. Fujikura& E. Tsuchida, 2008
Leptochiton smirnovi Sirenko, 2016
Pterochiton spatulatus (FOSSIL) Hoare & al., 1972 †
Leptochiton sperandus (T. Iredale & A.F.B. Hull,1925)
Deshayesiella spicata (S.S. Berry, 1919)
Parachiton statianus (FOSSIL) Dell'Angelo & al., 2015 †
Leptochiton subantarcticus (T. Iredale & A.F.B. Hull,1930)
Leptochiton surugensis H. Saito, 1997
Leptochiton sykesi (G.B. III Sowerby, 1903)
Leptochiton tenuidontus H. Saito & T.A. Okutani,1990
Leptochiton tenuis P. Kaas, 1979
Pterochiton texanus (FOSSIL) (Girty, 1909 †)
Parachiton textilis A.W.B. Powell, 1937
Leptochiton thalattius P. Kaas & R.A. Van Belle,1985
Leptochiton thandari B.I. Sirenko, 2001
Leptochiton torishimensis (W.L. Wu & T.A. Okutani,1984)