Anadara secernenda (É. Lamy, 1907)
Anadara sechurana (FOSSIL) A.A. Olsson, 1932 †
Asperarca secreta R. La Perna, 1998
Arca securiculata (FOSSIL) B. Wade, 1926 †
Scapharca sedanensis (FOSSIL) K. Martin, 1910 †
Anadara sellardsi (FOSSIL) W.C. Mansfield, 1932 †
Barbatia semirita (FOSSIL) Berezovsky, 2010 †
Trisidos semitorta (J.B.P.A. Lamarck, 1819)
Anadara senegalensis (J.F. Gmelin, 1791)
Senilia senilis (C. Linnaeus, 1758)
Barbatia seraperta (FOSSIL) G.F. Harris, 1946 †
Barbatia setigera (L.A. Reeve, 1844)
Anadara setigericosta (P. Nyst, 1848)
Anadara setoensis (FOSSIL) (M. Yokoyama, 1938 †)
Bathyarca sibogai (B. Prashad, 1932)
Mesocibota signata (R.W. Dunker, 1868)
Cunearca silverdalensis (FOSSIL) Kellum, 1926 †
Anadara similis (C.B. Adams, 1852)
Barbatia simulans (FOSSIL) R. Tate, 1886 †
Bathyarca sinuata J.P.L. Pelseneer, 1903
Arca sinuata (FOSSIL) K. Martin, 1885 †
Arca sisquocensis (FOSSIL) N.W. Reinhart, 1937 †
Acar sociella (J. Brookes, 1926)
Lunarca solida (W.J. Broderip& G.B. I Sowerby, 1829)
Barbatia solidula R.W. Dunker, 1868
Barbatia soluta (FOSSIL) Berezovsky, 2015 †
Calloarca soyoae (T. Habe, 1958)
Barbatia spathulata (FOSSIL) G.P. Deshayes, 1858 †
Arca spatulata (FOSSIL) G.P. Deshayes, 1881 †
Anadara speciosa (R.A. Philippi, 1849)
Barbatia speyeri (FOSSIL) (C.G. Semper, 1861 †)
Scapharca spiekeri (FOSSIL) A.A. Olsson, 1932 †
Anadara springvalensis (FOSSIL) E.H. Vokes, 1938 †
Acar squamosa (J.B.P.A. Lamarck, 1819)
Anadara staminata (FOSSIL) (W.H. Dall, 1898 †)