Favartia tetragona (W.J. Broderip, 1833)
Spinucella tetragona (FOSSIL) (Sowerby, 1825 †)
Boreotrophon tetricus (FOSSIL) (T.A. Conrad, 1832 †)
Chicoreus teva R. Houart & F.Jr. Lorenz,2016
Hexaplex texanus (FOSSIL) E.H. Vokes, 1968 †
Hadriania textiliosa (FOSSIL) (J.B.P.A. Lamarck,1803 †)
Subpterynotus textilis (FOSSIL) (W.M. Gabb, 1873 †)
Phycothais texturata (E.A. Smith, 1904)
Laevityphis thagus (FOSSIL) A.A. Olsson, 1930 †
Murexsul thalmanni E.H. Vokes, 1968
Ocenebra thilensis (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1923 †
Chicoreus thomasi (J.C.H. Crosse, 1872)
Aspella thomassini R. Houart, 1985
Pradoxa thomensis (F. Fernandes & E. Rolán,1990)
Siratus thompsoni (H.R. Bullis, 1964)
Eupleura thompsoni (FOSSIL) W.P. Woodring, 1959 †
Laevityphis tillierae (R. Houart, 1986)
Nassa tinosa (FOSSIL) H.A. Pilsbry& A.A. Olsson, 1941 †
Conchatalos tirardi (R. Houart, 1991)
Semiricinula tissoti (S.A.A. Petit De La Saussaye, 1852)
Siphonochelus tityrus (F.M. Bayer, 1971)
Murexsul tokubeii K. Nakamigawa & T. Habe,1964
Murexsul tokubeii marianae (R. Houart, 2003)
Ergalatax tokugawai J.T. Kuroda & T. Habe,1971
Boreotrophon tolomius (W.H. Dall, 1919)
Mipus tomlini (C.O. Van Regteren Altena,1950)
Mipus tonganus M. Oliverio, 2008
Murex toreia (FOSSIL) C.J. Maury, 1925 †
Trophon torquatus (FOSSIL) R. Tate, 1888 †
Triplex torrefactus (G.B. II Sowerby, 1841)
Triplex torrefactus benedictinus C.H.W.T. Löbbecke, 1879
Triplex torrefactus kilburni R. Houart & T. Pain, 1982
Triplex torrefactus rubiginosus L.A. Reeve, 1845
Homalocantha tortua (W.J. Broderipin G.B. II Sowerby, 1834)
Mipus tortuosus (M. Azuma, 1961)