Lioglyphostoma tenuata (FOSSIL) F.S. MacNeil, 1960 †
Crassispira tepocana W.H. Dall, 1919
Comitas terrisae (FOSSIL) P. Vella, 1954 †
Antiplanes thalaea (W.H. Dall, 1902)
Funa theoreta (J.C. Melvill, 1899)
Compsodrillia thestia (W.H. Dall, 1919)
Comitas thisbe (E.A. Smith, 1906)
Comitas thisbe diomedea A.W.B. Powell, 1969
Thelecytharella timorensis (M.M. Schepman, 1913)
Hindsiclava tippetti E.J. Petuch, 1987
Crassispira tittabweensis (FOSSIL) E.W. Vredenburg, 1921 †
Brachytoma tjemoroensis (FOSSIL) Martin, 1903 †
Pseudomelatoma torosa (P.P. Carpenter, 1864)
Epidirona torquata (C. Hedley, 1922)
Comitas torquayensis A.W.B. Powell, 1944
Compsodrillia torvita (FOSSIL) F.S. MacNeil, 1960 †
Comitas trailli (F.W. Hutton, 1873)
Megasurcula tremperiana (W.H. Dall, 1911)
Crassispira trencarti P. Ryall, J. Horro& E. Rolán, 2009
Compsodrillia tricatenaria (FOSSIL) (T.A. Conrad, 1862 †)
Crassispira trimariana H.A. Pilsbry & H.N. Lowe,1932
Compsodrillia tristicha (W.H. Dall, 1889)
Otitoma tropispira Morassi,Nappo & Bonfitto, 2017
Crassispira tryoni W.H. Dall
Epidirona tuberculata C.F. Laseron, 1954
Knefastia tuberculifera (W.J. Broderip& G.B. I Sowerby, 1829)
Brachytoma tuberosa (E.A. Smith, 1875)
Crassispira tuckerana A. Bonfitto & M. Morassi,2011
Crassispira tuckeri (FOSSIL) J. Le Renard, 1994 †
Crassispira turricula (G.B. I Sowerby, 1834)
Leucosyrinx turritus A.V. Sysoev, 1990
Crassispira tyloessa (FOSSIL) W.P. Woodring, 1970 †
Lioglyphostoma tyro (FOSSIL) J. Gardner, 1937 †
Pilsbryspira umbrosa (J.C. Melvill, 1923)
Compsodrillia undatichorda J.H. McLean & L.H. Poorman,1971