Bela taprurensis (P.M. Pallary, 1904)
Bela taprurensis albina (P.M. Pallary, 1904)
Antiguraleus taranakiensis (FOSSIL) (J. Marwick, 1926 †)
Ithycythara tarri (FOSSIL) (C.J. Maury, 1910 †)
Guraleus tasmanicus (J.E. Tenison-Woods,1876)
Guraleus tasmantis C.F. Laseron, 1954
Oenopota tayensis (S. Nomura & K.M. Hatai,1938)
Mangelia teirata (FOSSIL) J. Gardner, 1937 †
Agathotoma temporaria E. Rolán & J. Otero-Schmidt,1999
Eucithara tenebrosa (L.A. Reeve, 1846)
Sorgenfreispira tenella (FOSSIL) (C. Mayer, 1858 †)
Mangelia tenuicosta (G.A. Brugnone, 1862)
Obesotoma tenuilirata (W.H. Dall, 1871)
Oenopota tenuissima W.H. Dall, 1919
Bela tenuistriata (FOSSIL) (A. Bell, 1871 †)
Oenopota tenuistriata A.N. Golikov& O.A. Scarlato, 1985
Antiguraleus tepidus (C.F. Laseron, 1954)
Propebela terpeniensis I.P. Bogdanov, 1989
Tenaturris terpna (FOSSIL) W.P. Woodring, 1928 †
Mangelia terpnisma J.C. Melvill & R. Standen,1901
Propebela tersa (P. Bartsch, 1941)
Pseudorhaphitoma tetragona (A.A. Gould, 1861)
Curtitoma tevelliana (Turton, 1834)
Cythara thapsiae J.J. Oberling, 1970
Kurtziella thektapleura (FOSSIL) J. Gardner, 1937 †
Mangelia thepalea J.C. Melvill & R. Standen,1896
Macteola theskela (J.C. Melvill & R. Standen,1895)
Mangelia theskeloides J.C. Melvill & R. Standen,1895
Pseudorhaphitoma thielei R.N. Kilburn, 1993
Guraleus thornleyanus (C.F. Laseron, 1954)
Liracraea titirangiensis (FOSSIL) J. Marwick, 1928 †
Guraleus tokunagae (FOSSIL) (H.J. Finlay, 1973 †)
Obesotoma tomiyaensis (FOSSIL) (Y. Otuka, 1949 †)
Mangelia toreumata (W.H. Dall, 1889)
Citharomangelia townsendi (G.B. III Sowerby, 1895)