Leptopoma tagolandense H.A. Pilsbry, 1908
Cyclotus taivanus A. Adams, 1870 China, Guangxi province28 mm
Cyclotus taivanus dilatus Y.C. Lee & W.L. Wu, 2001 Taiwan
Cyclotus taivanus diminutus J.T. Kuroda & T. Kano,1941 China, Guangxi province17 mm
Cyclotus taivanus peraffinis H.A. Pilsbry & Y. Hirase,1905 Japan11 mm
Cyathopoma taiwanicum H.A. Pilsbry & Y. Hirase,1905 Taiwan
Chamalycaeus takahashii T. Habe, 1976 Japan, Amabe
Cyclophorus talboti H.H. Godwin-Austen, 1889 Malaysia, Borneo
Boucardicus tantelyae K.C. Emberton, 2010 Madagascar, Andriantantely
Pearsonia tembatensis Marzuki & R. Clements,2013
Japonia tenebricosa (A. Adams & L.A. Reeve,1848) Malaysia, Borneo
Rhiostoma tenerum (K.T. Menke, 1856) Malaysia
Pterocyclus tenuilabiatus (W. Metcalfe, 1851) Malaysia, Borneo28,1 mm
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 Taiwan
Chamalycaeus tokunoshimanus H.A. Pilsbry & Y. Hirase,1904 Japan, Kagoshima
Rhiostoma tomlini A.E. Salisbury, 1949 Thailand, Bangkok
Japonia toshimana H.A. Pilsbry & Y. Hirase Japan, Kagoshima
Ditropopsis trachychilus J.J. Vermeulen, T.S. Liew& M. Schilthuizen, 2015
Pearsonia travancorica (W.T. Blanford, 1869) India, Travancore
Cyathopoma travancoricum R.H. Beddome, 1875 India, Travancore
Ditropopsis tricarinatum (E.A. Smith, 1894) Malaysia, Borneo
Boucardicus tridentatus K.C. Emberton& T.A. Pearce, 1999 Madagascar, Tulear
Japonia trilirata (L. Pfeiffer, 1852) Malaysia, Borneo
Theobaldius tristis (W.T. Blanford, 1869) India, Cuddalore
Cyclophorus trochiformis W. Kobelt, 1886
Cyathopoma trochlea (W.H. Benson, 1851) India, Western Ghats
Japonia trochoides (F. Stoliczka, 1872) Malaysia7 mm
Japonia trochulus (E.C. Von Martens, 1867)
Leptopoma trochus W.L.H. Dohrn, 1862 Malaysia, Borneo
Boucardicus trompettus K.C. Emberton, 2002 Madagascar, Andriantantely