Tatara transenna (FOSSIL) (H.H. Suter, 1917 †)
Iphinopsis traverseensis (A.H. Clarke, 1961)
Narona trema (FOSSIL) A.A. Olsson, 1932 †
Cancellaria tritonidea (FOSSIL) W.M. Gabb, 1866 †
Ventrilia triumpha (FOSSIL) A.A. Olsson, 1964 †
Sveltia trochilia (FOSSIL) A.A. Olsson, 1964 †
Trigonostoma trochleare (FOSSIL) (Faujas, 1817 †)
Aphera trophis (FOSSIL) B.M. Landau & al., 2012 †
Trigonostoma tryblium P. Bouchet & R.E. Petit,2008
Nipponaphera tuba P. Bouchet & R.E. Petit,2008
Brocchinia tuberculifera (FOSSIL) (C.R. Laws, 1935 †)
Trigonostoma tuberculosum (G.B. I Sowerby, 1832)
Nothoadmete tumida P.G. Oliver, 1982
Microsveltia tupasi A. Verhecken, 2011
Cancellaria turrita G.B. II Sowerby, 1874
Pyruclia tweedledee (FOSSIL) B.M. Landau & al., 2012 †
Pyruclia tweedledum (FOSSIL) B.M. Landau & al., 2012 †
Cancellaria typica F. Paetel, 1888
Trigonostoma umbilicare (G.B. Brocchi, 1814 )
Cancellaria umbilicata R.P. Lesson, 1842
Neadmete unalashkensis (W.H. Dall, 1873)
Sydaphera undulata (G.B. II Sowerby, 1849)
Cancellaria uniangulata G.P. Deshayes, 1830
Cancellaria unifasciata W.H. Dall, 1909
Cancellaria urceolata R.B. Hinds, 1843
Pyruclia uva (FOSSIL) P.O. Jung & R.E. Petit,1990 †
Admetula valientensis (FOSSIL) B.M. Landau & al., 2012 †
Scalptia vangoethemi A. Verhecken, 1995
Loxotaphrus variciferus (FOSSIL) (R. Tate, 1888 †)
Sveltia varicosa (FOSSIL) (G.B. Brocchi, 1814 †)
Sveltia varicosa paucicostata (FOSSIL) (M.A. Peyrot, 1928 †)
Sveltia varicosa simplicior (FOSSIL) F. Sacco, 1894 †
Merica variculosa (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1921 †
Babylonella veneranda (FOSSIL) (C. Beets, 1946 † †)
Euclia venezuelana (FOSSIL) F. Hodson & al., 1931 †