Exogyra reedi (FOSSIL) Imlay, 1937 †
Palaeogyra reniformis (FOSSIL) (G.A. Goldfuss, 1833 †)
Texigryphaea roemeri (FOSSIL) Marcou †
Argutostrea roemeri (FOSSIL) (F.A. von Quenstedt,1843 †)
Gryphaeostrea sanjuanicus (FOSSIL) Morales-Ortega & al.,2016 †
Exogyra scheibei (FOSSIL) Bohm, 1926 †
Crenostrea segurai (FOSSIL) W.P. Woodring, 1976 †
Hyotissa semiplana (FOSSIL) (J. de C. Sowerby) †
Exogyra sergipensis (FOSSIL) C.J. Maury, 1936 †
Exogyra sigmoidea (FOSSIL) A.E. Reuss, 1844 †
Hyotissa sinensis (J.F. Gmelin, 1791)
Circogryphaea sinzovi (FOSSIL) Netschajew †
Exogyra solea (FOSSIL) Müller, 1900 †
Hyotissa solida (G.B. Sowerby, 1871)
Exogyra spinifera (FOSSIL) L.W. Stephenson, 1914 †
Ceratostreon spinosum (FOSSIL) (Matheron, 1842 †)
Pycnodonte squarrosa (FOSSIL) M. de Serres, 1843 †
Crenostrea stewarti (FOSSIL) (G.D. Hanna, 1927 †)
Gryphaea stomatoidea (FOSSIL) E. Forbes, 1846 †
Pycnodonte subdentata (FOSSIL) (F.W. Hutton, 1873 †)
Bilobissa sublobata (FOSSIL) (G.P. Deshayes, 1830 †)
Rhynchostreon suborbiculatum (FOSSIL) (J.B.P.A. Lamarck,1801 †)
Exogyra tamaulipana (FOSSIL) Imlay, 1937 †
Pycnodonte taniguchii I. Hayami & T. Kase, 1992
Pycnodonte tarda (FOSSIL) (F.W. Hutton, 1873 †)
Ceratostreon texanum (FOSSIL) (F.A. Roemer, 1849 †)
Ceratostreon texanum weatherfordensis (FOSSIL) (Cragin, 1893 †)
Gryphaeostrea trachyoptera (FOSSIL) White, 1887 †
Pycnodonte trigonalis (FOSSIL) †
Hyotissa tryoni (FOSSIL) (W.M. Gabb, 1881 †)
Labrostrea umsineniensis (FOSSIL) Cooper 1992 †
Exogyra upatoiensis (FOSSIL) L.W. Stephenson, 1914 †
Crenostrea verracruzana (FOSSIL) Perrilliat, 1994 †
Phygraea vesiculare (FOSSIL) (J.B.P.A. Lamarck,1806 †)
Phygraea vesiculare vesiculosa (FOSSIL) (J. de C. Sowerby,1822 †)