Leptopoma tagolandense H.A. Pilsbry, 1908
Cyclotus taivanus A. Adams, 1870
Cyclotus taivanus dilatus Y.C. Lee & W.L. Wu, 2001
Cyclotus taivanus diminutus J.T. Kuroda & T. Kano,1941
Cyclotus taivanus peraffinis H.A. Pilsbry & Y. Hirase,1905
Cyathopoma taiwanicum H.A. Pilsbry & Y. Hirase,1905
Chamalycaeus takahashii T. Habe, 1976
Cyclophorus talboti H.H. Godwin-Austen, 1889
Boucardicus tantelyae K.C. Emberton, 2010
Pearsonia tembatensis Marzuki & R. Clements,2013
Japonia tenebricosa (A. Adams & L.A. Reeve,1848)
Rhiostoma tenerum (K.T. Menke, 1856)
Pterocyclus tenuilabiatus (W. Metcalfe, 1851)
Spiraculum thachi (F. Huber, 2017)
Alycaeus theobaldi W.T. Blanford, 1862
Cyclophorus theobaldianus W.H. Benson, 1857
Cyclophorus theodori C.M.F. Ancey, 1887
Cyclophorus tigrinus (G.B. Sowerby, 1843)
Leptopoma tigris J.T. Kuroda & T. Kano,1941
Chamalycaeus tokunoshimanus H.A. Pilsbry & Y. Hirase,1904
Rhiostoma tomlini A.E. Salisbury, 1949
Japonia toshimana H.A. Pilsbry & Y. Hirase
Ditropopsis trachychilus J.J. Vermeulen, T.S. Liew& M. Schilthuizen, 2015
Pearsonia travancorica (W.T. Blanford, 1869)
Cyathopoma travancoricum R.H. Beddome, 1875
Ditropopsis tricarinatum (E.A. Smith, 1894)
Boucardicus tridentatus K.C. Emberton & T.A. Pearce,1999
Japonia trilirata (L. Pfeiffer, 1852)
Theobaldius tristis (W.T. Blanford, 1869)
Cyclophorus trochiformis W. Kobelt, 1886
Cyathopoma trochlea (W.H. Benson, 1851)
Japonia trochoides (F. Stoliczka, 1872)
Japonia trochulus (E.C. Von Martens, 1867)
Leptopoma trochus W.L.H. Dohrn, 1862
Boucardicus trompettus K.C. Emberton, 2002