Manaria thurstoni E.A. Smith, 1906
Latisipho timetus (W.H. Dall, 1919)
Gemophos tinctus (T.A. Conrad, 1846)
Siphonalia tjibaliungensis (FOSSIL) (K. Martin, 1895 †)
Clivipollia tokiae M. Chino & K. Fraussen,2015
Cominella tolagaensis (W.F. Ponder, 1968)
Prosipho tomlini A.W.B. Powell, 1957
Manaria tongaensis Fraussen & Stahlschmidt,2016
Plicifusus torquatus (A. Petrov, 1982)
Godfreyena torri (J.C. Verco, 1909)
Hesperisternia tortugera (FOSSIL) (A.A. Olsson, 1922 †)
Colus tortuosus (FOSSIL) Harmer, 1914 †
Gaillea tosaensis (T.A. Okutani & A. Iwahori,1992)
Prodotia townsendi (J.C. Melvill, 1918)
Retimohnia toyamana (R. Tiba, 1981)
Cantharus tranquebaricus (J.F. Gmelin, 1791)
Solenosteira transitoria (FOSSIL) E.J. Petuch, 1994 †
Pisania transsylvanica (FOSSIL) R. Hoernes & M. Auinger,1884 †
Buccinum trescostatum R. Tiba, 1980
Falsitromina tricarinata (A.W.B. Powell, 1951)
Buccinum tricarinatum W.H. Dall, 1877
Pollia tridentata (M. Tuomey & F.S. Holmes,1858 )
Engina trifasciata (L.A. Reeve, 1846)
Siphonalia trilica (FOSSIL) Rivera, 1957 †
Siphonalia triton (R.P. Lesson, 1841)
Pisania tritonoides (L.A. Reeve, 1846)
Bathyancistrolepis trochoideus (W.H. Dall, 1907)
Siphonalia trochulus (L.A. Reeve, 1843)
Siphonalia trochulus tokaiensis T. Kira, 1959
Limatofusus trombinus (W.H. Dall, 1919)
Aulacofusus trophius (W.H. Dall, 1919)
Volutopsius trophonius W.H. Dall, 1902
Truncaria truncata (FOSSIL) (G.P. Deshayes, 1835 †)
Caducifer truncatus (R.B. Hinds, 1844)
Buccinum tsubai J.T. Kuroda & T. Kikuchi,1933