Gonidomus sulcatus (O.F. Müller, 1774) Mauritius
Elma swinhoei (H.A. Pilsbry& Y. Hirase, 1905) Taiwan
Discartemon sykesi (W.E. Collinge, 1902) Vietnam, Da Nang
Gulella sylvia (J.C. Melvill& J.H. Ponsonby, 1903) South Africa7 mm
Gulella systemanaturae A.C. van Bruggen, 2008
Gulella taitensis B. Verdcourt, 1963 Kenya
Gulella taolantehezana K.C. Emberton, 2002 Madagascar
Parvedentulina tendrombohitra K.C. Emberton, 2002 Madagascar
Gulella tendronia K.C. Emberton, 2001
Parvedentulina terakabe K.C. Emberton, 2002 Madagascar
Gonospira teres L. Pfeiffer, 1856 Mauritius
Parvedentulina texieri K.C. Emberton, 2002 Madagascar
Gulella tharfieldensis (J.C. Melvill& J.H. Ponsonby, 1893) South Africa
Glabrennea thomasseti (E.R. Sykes, 1909) Seychelles
Gulella thompsoni K.C. Emberton, 2010 Madagascar
Parvedentulina thompsoni K.C. Emberton, 2010
Oophana thuthaoae Thach, 2017
Oophana tiomanensis R. Clements, 2006 Malaysia, Tioman Island17,3 mm
Elma tonkiniana (A.R.J.B. Bavay& P. Dautzenberg, 1903) Vietnam, Tonkin
Gulella tracheia B. Rowson, 2007 Zanzibar Island
Gulella translucida (L. Pfeiffer, 1852) Tanzania
Discartemon triancus T. Siriboon & S. Panha,2014 Perlis, Malaysia
Gulella triglochis (J.C. Melvill& J.H. Ponsonby, 1903) South Africa
Ennea trigonostoma (E.C. Von Martens, 1876)
Parvedentulina tsara K.C. Emberton, 2002 Madagascar
Gulella tsaratananae K.C. Emberton, 2001 Madagascar
Parvedentulina tsaravintana K.C. Emberton, 2002 Madagascar
Parvedentulina tsingia K.C. Emberton, 2002 Madagascar
Parvedentulina tsipika K.C. Emberton, 2002 Madagascar
Parvedentulina tsisubulina K.C. Emberton, 2002 Madagascar
Parvedentulina tsotra K.C. Emberton, 2002 Madagascar
Streptaxis tumescens H.H. Suter, 1900 New Zealand
Streptaxis tumulus H.A. Pilsbry, 1930 Brazil18 mm
Gonospira turgidula (G.P. Deshayes, 1863) La Reunion Island9 mm
Huttonella turricula (W.T. Blanford, 1880) India, Cuddalore