Labyrinthus tamsiana (R.W. Dunker, 1847)
Ganesella tanegashimae H.A. Pilsbry, 1901
Turgenitubulus tanmurrana G.A. Solem, 1985
Chloritis tanquereyi (J.C.H. Crosse& P.H. Fischer, 1893)
Labyrinthus tarapotensis (S. Moricand, 1858)
Labyrinthus tarapotensis baeri (P. Dautzenberg, 1902)
Sinumelon tarcoolanum G.A. Solem, 1992
Torresitrachia tasmani F. Köhler, 2011
Glyptorhagada tattawuppana G.A. Solem, 1992
Papuina taumantias C.M. Tapparone-Canefri,1883
Rhynchotrochus taylorianus (A. Adams & L.A. Reeve,1848)
Rhynchotrochus taylorianus yulensis (J.W. Brazier, 1876)
Kimberleymelon tealei F. Köhler, 2010
Labyrinthus tenaculum W.H. Dall, 1909
Chloritis tenebrica H.C. Fulton, 1902
Chloritis tenella (L. Pfeiffer, 1862)
Albersia tenuis L. Pfeiffer
Rhagada tescorum (W.H. Benson, 1853)
Satsuma textilis H.A. Pilsbry & Y. Hirase,1904
Amphidromus thachi M. Huber, 2015
Amphidromus thakhekensis Thach & F. Huber, 2017
Amphidromus thalassochromus J.J. Vermeulen & D.J. Junau,2007
Amphidromus thanhhoaensis Thach & Huber, 2016
Camaena thanhhoaensis Thach, 2016
Torresitrachia thedana G.A. Solem, 1985
Baudinella thielei F. Köhler, 2011
Thersites thorogoodi T. Iredale, 1937
Ganesella thrix J.H. Ponsonby, 1906
Ganesella tigaensis (H.H. Godwin-Austen,1891)
Megalacron tizianoi A. Delsaerdt, 2016
Satsuma tokunoshimana H.A. Pilsbry & Y. Hirase,1904
Papuina tomasinella C.M. Tapparone-Canefri,1883
Chloritis tomentosa (L. Pfeiffer, 1854)
Nipponochloritis tomiyamai H. Minato, 1982
Cupedora tomsetti (R. Tate, 1887)