Isotriphora tigrina M.R. Fernandes, A. Pimenta& J.H. Leal, 2013
Coriophora tigris (C.F. Laseron, 1958)
Coriophora torpedo (C.F. Laseron, 1958)
Nanaphora torquesa C.F. Laseron, 1958
Inella torticula (W.H. Dall, 1881)
Obesula tribulationis (C. Hedley, 1909)
Metaxia tricarinata (W.H. Pease, 1861)
Opimaphora trichroma C.F. Laseron, 1958
Viriola tricincta (R.W. Dunker, 1882)
Isotriphora tricingulata E. Rolán& R. Fernández-Garcés, 2015
Similiphora triclotae P. Bouchet, 1997
Mastonia tricolor F.P. Jousseaume, 1884
Nanaphora tricolor C.F. Laseron, 1958
Triphora triforis (FOSSIL) Orbigny, 1850 †
Inella triserialis (W.H. Dall, 1881)
Triphora tristis R.B. Hinds, 1843
Nanaphora triticea (W.H. Pease, 1861)
Mastonia troglodytes (R.P.J. Hervier, 1898)
Aclophora tropica C.F. Laseron, 1958
Viriola truncata B.A. Marshall, 1983
Monophorus truncatula (O.F. Müller, 1774)
Nanaphora truncis C.F. Laseron, 1958
Coriophora tryoni (C.K. Chang & W.L. Wu,2005)
Triphora tuberculata W.H. Pease, 1871
Iniforis tuberia C.F. Laseron, 1958
Triphora tubifera K.H.J. Thiele, 1925
Monophorus tubularis (C.F. Laseron, 1958)
Mastonia tulipa F.P. Jousseaume, 1898
Obesula turricula (R.P.J. Hervier, 1898)
Iniforis turristhomae (H.S. Holten, 1802)
Seilarex turritelliformis (G.F. Angas, 1877)
Triphora turtlebayensis E. Rolán & Y.C. Lee, 2008
Mastonia undata (S. Kosuge, 1962)
Inella undebermuda E. Rolán & H.G. Lee, 2008
Nototriphora unicarinata B.A. Marshall, 1983