Sphaerospira tomsoni (J.W. Brazier, 1876)
Polydontes torrei H.A. Pilsbry, 1938
Zachrysia torrei (J. Henderson, 1916)
Torresitrachia torresiana (J.B. Hombron& C.H. Jacquinot, 1841)
Planispira torticollis (E.J. Le Guillou, 1842)
Rhagada torulus (A.E.J. Férussac, 1819)
Nipponochloritis tosanus (H.A. Pilsbry & Y. Hirase,1903)
Camaena trailli L. Pfeiffer, 1855
Papuina translucida (J.R.C. Quoy& J.P. Gaimard, 1832)
Chloritis transversalis (A. Mousson, 1857)
Camaena trezonana (G.A. Solem, 1992)
Amplirhagada tricenaria F. Köhler, 2010
Crystallopsis tricolor (L. Pfeiffer, 1849)
Beddomea trifasciata (J.F. Gmelin, 1786)
Zachrysia trinitaria (J. Gundlachin L. Pfeiffer, 1858)
Isomeria triodonta (A.V.M.D. D'Orbigny,1835)
Traumatophora triscalpta (E.C. Von Martens, 1875)
Moellendorffia trisinuata (E.C. Von Martens, 1867)
Moellendorffia trisinuata sculptilis (O.F. von Möllendorff,1884)
Ganesella trochacea T.C. Yen, 1939
Ganesella trochacea pallens T.C. Yen, 1939
Papuina trochiformis H.B. Preston, 1902
Westraltrachia tropida G.A. Solem, 1984
Baudinella tuberculata F. Köhler, 2011
Trachiopsis tuckeri (L. Pfeiffer, 1846)
Westraltrachia turbinata G.A. Solem, 1984
Quistrachia turneri G.A. Solem, 1997
Posorites turneri (F. Shirley, 1921)
Ganesella ulingensis A. Zilch, 1966
Setobaudinia umbadayi F. Köhler, 2011
Glyptorhagada umberatana B.C. Cotton, 1953
Kimberleytrachia umbonis (G.A. Solem, 1979)
Labyrinthus uncigera (S.A.A. Petit De La Saussaye, 1838)
Satsuma uncopila (P.M. Heude, 1882)
Polydontes undulata A.E.J. Férussac, 1821