Gonidomus sulcatus (O.F. Müller, 1774)
Elma swinhoei (H.A. Pilsbry & Y. Hirase,1905)
Discartemon sykesi (W.E. Collinge, 1902)
Gulella sylvia (J.C. Melvill& J.H. Ponsonby, 1903)
Gulella systemanaturae A.C. van Bruggen, 2008
Gulella taitensis B. Verdcourt, 1963
Gulella taolantehezana K.C. Emberton, 2002
Parvedentulina tendrombohitra K.C. Emberton, 2002
Gulella tendronia K.C. Emberton, 2001
Parvedentulina terakabe K.C. Emberton, 2002
Gonospira teres L. Pfeiffer, 1856
Parvedentulina texieri K.C. Emberton, 2002
Gulella tharfieldensis (J.C. Melvill& J.H. Ponsonby, 1893)
Glabrennea thomasseti (E.R. Sykes, 1909)
Gulella thompsoni K.C. Emberton, 2010
Parvedentulina thompsoni K.C. Emberton, 2010
Oophana thuthaoae Thach, 2017
Oophana tiomanensis R. Clements, 2006
Elma tonkiniana (A.R.J.B. Bavay& P. Dautzenberg, 1903)
Gulella tracheia B. Rowson, 2007
Gulella translucida (L. Pfeiffer, 1852)
Discartemon triancus T. Siriboon & S. Panha,2014
Gulella triglochis (J.C. Melvill& J.H. Ponsonby, 1903)
Ennea trigonostoma (E.C. Von Martens, 1876)
Parvedentulina tsara K.C. Emberton, 2002
Gulella tsaratananae K.C. Emberton, 2001
Parvedentulina tsaravintana K.C. Emberton, 2002
Parvedentulina tsingia K.C. Emberton, 2002
Parvedentulina tsipika K.C. Emberton, 2002
Parvedentulina tsisubulina K.C. Emberton, 2002
Parvedentulina tsotra K.C. Emberton, 2002
Streptaxis tumescens H.H. Suter, 1900
Streptaxis tumulus H.A. Pilsbry, 1930
Gonospira turgidula (G.P. Deshayes, 1863)
Huttonella turricula (W.T. Blanford, 1880)