Anadara tosaensis (FOSSIL) H. Noda, 1965 †
Barbatia tramitensis (FOSSIL) Cragin, 1893 †
Acar transmar L.R.L. Simone, 2009
Anadara transversa (T. Say, 1822)
Anadara transversa demiri P. Piani, 1981
Anadara trapezia (G.P. Deshayes, 1839)
Acar trapeziformis (FOSSIL) K. Martin, 1879 †
Barbatia trapezina (J.B.P.A. Lamarck, 1819)
Barbatia trapezina decussata (G.B. I Sowerby, 1833)
Anadara trapezoida (FOSSIL) Tiwari, 2001 †
Anadara tricenicosta (P. Nyst, 1848)
Anadara trilineata (FOSSIL) T.A. Conrad, 1856 †
Barbatia trilineriana H.B. Preston
Arca trinchinopolitensis E. Forbes, 1846
Anadara troscheli (R.W. Dunker, 1882)
Anadara tsudai (FOSSIL) H. Noda, 1966 †
Anadara tuberculosa (G.B. I Sowerby, 1833)
Anadara tuberculosa secticostata (L.A. Reeve, 1844)
Deltaodon tugelae K.H. Barnard, 1962
Arca turbatrix P.G. Oliver & R. von Cosel,1993
Arca turnbulli (FOSSIL) Reed, 1905 †
Arca turoniensis (FOSSIL) F. Dujardin, 1837 †
Arca turoniensis aquitanica (C. Mayer, 1861)
Arca tutamoensis (FOSSIL) J. Marwick, 1931 †
Arca uedai (FOSSIL) T. Matsubara, 2002 †
Barbatia uhligi (FOSSIL) Boehm, 1881 †
Arca umbonaria (FOSSIL) C. Mayer, 1861 †
Anadara uropigimelana (J.B.G.M. Bory De Saint-Vincent, 1827)
Anadara usiacurii (FOSSIL) F.M. Anderson, 1929 †
Hawaiarca uwaensis (M. Yokoyama, 1928)
Barbatia uxorispalmeri (FOSSIL) H.B. Stenzel & E. Krause,1957 †
Arca valdensis (FOSSIL) Boussac, 1911 †
Arca valdiviana (FOSSIL) Grzybowski, 1899 †
Anadara valentichscotti Thach, 2016
Scapharca valentula (FOSSIL) (M. Yokoyama, 1923 †)