Parvicardium trapezium A. Cecalupo & P. Quadri,1996
Microcardium trapezoidale J. Poutiers, 2006
Acrosterigma triangulare B.K. Raines & M. Huber,2012
Orthocardium trifidum (FOSSIL) (G.P. Deshayes, 1858 †)
Discors triforme (FOSSIL) (Sowerby, 1840 †)
Didacna trigonoides (P.S. Pallas, 1771)
Laevicardium tristiculum (FOSSIL) M. Yokoyama, 1924 †
Protocardia truncata (FOSSIL) (Sowerby, 1827 †)
Acanthocardia tuberculata (C. Linnaeus, 1758)
Schedocardia tuomeyi (FOSSIL) (T.H. Aldrich, 1886 †)
Cardium turonense (FOSSIL) C. Mayer in R. Hoernes,1870 †
Cardium turonicum (FOSSIL) C. Mayer in R. Hoernes,1861 †
Cardium turoniense (FOSSIL) H. Woods, 1897 †
Papillicardium turtoni (G.B. III Sowerby, 1894)
Septocardia typica (FOSSIL) J.W. Hall& R.P. Whitfield, 1877 †
Fulvia undatopicta (H.A. Pilsbry, 1904)
Fragum unedo (C. Linnaeus, 1758)
Acrosterigma uniornatum E. Vidal, 1999
Ethmocardium ursaniense (FOSSIL) H.D. Russell & Landes,1937 †
Ciliatocardium uyemurai (FOSSIL) (K. Kanehara, 1937 †)
Frigidocardium valdentatum J. Poutiers, 2006
Fragum vanuatuense J.J. Ter Poorten, 2015
Trachycardium vaquerosensis (FOSSIL) R. Arnold, 1908 †
Acrosterigma variegatum (G.B. II Sowerby, 1840)
Microcardium velatum J.J. Ter Poorten& J. Poutiers, 2009
Laevicardium venustulum (FOSSIL) E.H. Vokes, 1989 †
Cardium venustum (FOSSIL) Wood, 1840 †
Laevicardium venustum (FOSSIL) W.M. Gabb, 1873 †
Fulvia vepris E. Vidal & L. Kirkendale,2007
Cardium verbeeki (FOSSIL) Martin, 1879 †
Vepricardium verrucosum (FOSSIL) (G.P. Deshayes, 1829 †)
Vasticardium vertebratum (I.H. Jonas, 1844)
Dinocardium vicksburgense (FOSSIL) (T.A. Conrad, 1848 †)
Freneixicardia victor (G.F. Angas, 1872)
Pratulum victoriae (FOSSIL) (R. Tate, 1887 †)