Ledina smirna (FOSSIL) W.H. Dall, 1898 †
Nuculana smithvillensis (FOSSIL) †
Saccella snatolensis (FOSSIL) Slodkewitsch, 1938 †
Pseudoportlandia solenelloides (FOSSIL) (P. Marshall, 1919 †)
Nuculana solida (W.H. Dall, 1881)
Ledella solidula (E.A. Smith, 1885)
Saccella soriensis (FOSSIL) F.E. Eames, 1951 †
Adrana sowerbyana (A.V.M.D. D'Orbigny,1833)
Nuculana soyoae T. Habe, 1958
Lamellileda soyomaruae (T.A. Okutani, 1962)
Poroleda spathula C. Hedley, 1915
Nuculana spathulata (FOSSIL) (Forbes) †
Nuculana speetonensis (FOSSIL) Woods †
Phestia speluncaria (FOSSIL) (H.B. Geinitz, 1848 †)
Nuculana spheniopsis (FOSSIL) †
Ledella spocki Viegas, N.P. Benaim& R.S. Absalão, 2014
Ledella spreta (K.H.J. Thiele& S.G.A. Jaeckel, 1931)
Girtyana stellara (FOSSIL) Yancey, 1978 †
Adrana stena (FOSSIL) W.P. Woodring, 1973 †
Polidevcia stevensiana (FOSSIL) (Girty, 1910 †)
Nuculana stewardi (FOSSIL) A.A. Olsson, 1931 †
Saccella striata (FOSSIL) (J.B.P.A. Lamarck,1805 †)
Nuculana striatula E. Forbes, 1846
Phestia subacuta (FOSSIL) (L. Waagen, 1881 †)
Saccella subcerata (FOSSIL) W.P. Woodring, 1925 †
Ledina sublaevis (FOSSIL) (L.M.D. Bellardi, 1839 †)
Ledella sublevis Verrill & K.J. Bush, 1898
Portlandella sublischkei (FOSSIL) Y.B. Gladenkov, 1984 †
Nuculana subnapanica (FOSSIL) L. Krishtofovich, 1984 †
Nuculana subquadrata (FOSSIL) Martin, 1883 †
Nuculana subtrigonalis (FOSSIL) Martin, 1883 †
Jupiteria subtumida (FOSSIL) W.P. Woodring, 1925 †
Nuculana sufficientia G.T. Poppe & S.P. Tagaro,2016
Nuculana sulcellata (FOSSIL) (Wissmann, 1841 †)
Pseudoportlandia tahuia (FOSSIL) J. Marwick, 1942 †