Modiolus stultorum (F.P. Jousseaume, 1893)
Lithophaga subalveata (FOSSIL) T.A. Conrad, 1866 †
Modiolula subangulata (FOSSIL) (G.P. Deshayes, 1858 †)
Modiolus subangustissimus (FOSSIL) Dacque, 1905 †
Lithophaga subattenuata (K.H. Kleemann& P. Maestrati, 2012)
Modiolus subcarinatus (FOSSIL) J.B.P.A. Lamarck, 1805 †
Lithophaga subcordata (FOSSIL) (Orbigny, 1850 †)
Modiolus subdirectus (FOSSIL) L. Krishtofovich †
Stavelia subdistorta (C.A. Récluz, 1852)
Lithophaga subelliptica (FOSSIL) Sayre, 1931 †
Volsellina subelliptica (FOSSIL) (F.B. Meek, 1867 †)
Solamen subfornicatum (FOSSIL) (Nagao) †
Aulacomya subfragilis (FOSSIL) (A.V.M.D. D'Orbigny,1847 †)
Lithophaga sublithophagus (FOSSIL) d'Orbigny, 1850 †
Mytilus submenkeanus (FOSSIL) R. Tate, 1886 †
Lecompteus subornatus (FOSSIL) (Etallon 1859) †
Modiolus subparallela (FOSSIL) (Portlock) †
Mytilus subpectinatus (FOSSIL) D'Orbigny, 1850 †
Musculus subpictus (F.J. Cantraine, 1835)
Mytilus subpygmaeus (FOSSIL) d'Orbigny, 1849 †
Brachidontes subramosus (S.C.T. Hanley, 1843)
Musculus subrostratus (FOSSIL) G.P. Deshayes, 1858 †
Modiolus subsimplex (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Brachidontes subsulcatus (R.W. Dunker, 1857)
Modiolus sulcatus (FOSSIL) J.B.P.A. Lamarck 1805 †
Musculus svecicus (O. Fabricius, 1788)
Promytilus swallovi (FOSSIL) (McChesney, 1860 †)
Sinomytilus swinhoei (H. Adams, 1870)
Bathymodiolus taiwanensis R. von Cosel, 2008
Bathymodiolus tangaroa R. von Cosel& B.A. Marshall, 2003
Botula tatei M. Huber, 2010
Gibbomodiola taurarcuata (FOSSIL) F. Sacco, 1898 †
Musculus taylori (W.H. Dall, 1897)
Mytilus tener (FOSSIL) Devjatilova, 1981 †
Modiolus tenuiradiatus (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1914 †