Hemichenopus thomsoni (FOSSIL) (J.K. Allan, 1926 †)
Pterocerella tippana (FOSSIL) (T.A. Conrad, 1858 †)
Dimorphosoma toxochila (FOSSIL) Gardner, 1875 †
Drepanocheilus transversus (FOSSIL) (W.M. Gabb, 1869 †)
Cuphosolenus travisensis (FOSSIL) (Stanton, 1947 †)
Aporrhais triangulata (FOSSIL) Gardner, 1884 †
Helicaulax tricosa (FOSSIL) (Saul & W.P. Popenoe,1993 †)
Dimorphosoma tricostata (FOSSIL) (A.V.M.D. D'Orbigny,1843 †)
Aporrhais tridactyla (FOSSIL) (A. Braun, 1850 †)
Trietteia tridactyla (FOSSIL) (Buvignier, 1843 †)
Undoriptera tridactylus (FOSSIL) A.V. Guzhov, 2014 †
Dicroloma tridigitatum (FOSSIL) (L.É.S. Piette, 1905 †)
Dicroloma trifida (FOSSIL) (B. Phillips, 1829 †)
Drepanocheilus triliratus (FOSSIL) L.W. Stephenson, 1941 †
Drepanocheilus triliratus (FOSSIL) S. Kiel & K. Bandel,2002 †
Tessarolax trinalis (FOSSIL) A. Murphy & P.U. Rodda,1960 †
Dicroloma triseriatum (FOSSIL) Parnes, 1981 †
Pietteia trispinigera (FOSSIL) J. Szabo, 1983 †
Tundora tuberculata (FOSSIL) L.W. Stephenson, 1941 †
Kaunhowenia tuberosa (FOSSIL) (Briart & Cornet, 1868 †)
Monocuphus tumidus (FOSSIL) (Laube, 1868 †)
Anchura turricula (FOSSIL) L.W. Stephenson, 1952 †
Cultrigera turriformis (FOSSIL) Abdel-Gawad, 1986 †
Anchura umbrana (FOSSIL) L.W. Stephenson, 1953 †
Alaria unicarinata (FOSSIL) Hudleston, 1884 †
Aporrhais unisinuata (FOSSIL) (C.L.F. von Sandberger,1861 †)
Cuphotifer unispinosa (FOSSIL) (Moore, 1867 †)
Aporrhais uttingerianus (FOSSIL) (A. Risso, 1826 †)
Aporrhais uttingerianus elegantissimus (FOSSIL) P. Parenzan, 1970 †
Drepanocheilus vagans (FOSSIL) Böhm & Heim, 1909 †
Dimorphosoma vectiana (FOSSIL) J. Gardner, 1875 †
Monocuphus vespa (FOSSIL) (Eudes-Deslongchamps,1843 †)
Alarimella veta (FOSSIL) (A. Packard, 1922 † †)
Aporrhais volkovi (FOSSIL) Zhizchenko, 1959 †
Arrhoges wagihi (FOSSIL) Abbass, 1967 †