Helminthochiton riddlei (FOSSIL) Frederickson, 1962 † USA, Oklahoma, Pontotoc
Leptochiton rissoi (H.F. Nierstrasz, 1905)
Leptochiton rogeri J.D. Sigwart& B.I. Sirenko, 2015
Parachiton ronaldi (P. Kaas& R.A. Van Belle, 1985) Réunion10 mm
Leptochiton rugatus (P.P. Carpenter in H.A. Pilsbry, 1892) Alaska, Wrangell Island6,6 mm
Leptochiton saitoi B.I. Sirenko, 2001 Vanuatu Island, New Hebrides
Leptochiton samadiae J.D. Sigwart& B.I. Sirenko, 2012 Solomon Islands
Leptochiton sanmatiensis Güller, Liuzzi& D.G. Zelaya, 2015
Leptochiton sarsi P. Kaas, 1981 Mediterranean Sea
Leptochiton scabridus (J.G. Jeffreys, 1880) France, Brittany7,1 mm
Leptochiton schwabei J.D. Sigwart& B.I. Sirenko, 2012 Solomon Islands
Leptochiton seishinmaruae H. Saito, 1997
Pilsbryella setigera (H.F. Nierstrasz, 1905) Indonesia, Makassar Strait
Leptochiton shapovalovi (FOSSIL) B.I. Sirenko, 2013 † Russia, Kostroma Region
Parachiton shinyomaruae H. Saito, 1996
Leptochiton sibiricus (FOSSIL) (Shurygin, 2001 †) Siberia
Leptochiton sigwartae B.I. Sirenko, 2015
Helminthochiton simplex (FOSSIL) W.J. Raymond, 1910 † USA, Ohio, Jackson
Deshayesiella sinica (F.S. Xu, 1990) China, Zhejiang
Deshayesiella sirenkoi H. Saito, K. Fujikura& E. Tsuchida, 2008
Leptochiton smirnovi Sirenko, 2016
Pterochiton spatulatus (FOSSIL) Hoare & al., 1972 † USA, Ohio, Jackson
Leptochiton sperandus (T. Iredale& A.F.B. Hull, 1925)
Deshayesiella spicata (S.S. Berry, 1919)
Parachiton statianus (FOSSIL) Dell'Angelo & al., 2015 † Italy
Leptochiton subantarcticus (T. Iredale& A.F.B. Hull, 1930) New Zealand
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 Bay of Biscay
Pterochiton texanus (FOSSIL) (Girty, 1909 †) USA, Texas, Culberson
Parachiton textilis A.W.B. Powell, 1937 New Zealand
Leptochiton thalattius P. Kaas & R.A. Van Belle,1985
Leptochiton thandari B.I. Sirenko, 2001 Vanuatu Island, New Hebrides
Leptochiton torishimensis (W.L. Wu & T.A. Okutani,1984)