Detracia strigosa (E.C. Von Martens, 1900)
Carychium stygium R.E. Call, 1897
Zospeum suarezi E. Gittenberger, 1980
Pedipes subglobosus A. Garrett, 1857
Ellobium subjudae (FOSSIL) A.V.M.D. D'Orbigny,1852 †
Ellobium subnodosum (W. Metcalfe, 1851)
Zospeum subobesum J. Bole, 1974
Cassidula subrepta J.B. Hombron& C.H. Jacquinot, 1848
Auriculastra subula (J.R.C. Quoy& J.P. Gaimard, 1832)
Allochroa succinea I. Perugia, 2010
Creedonia succinea (L. Pfeiffer, 1854)
Carychium suevicum (FOSSIL) O. Boettger, 1877 †
Ophicardelus sulcatus H. Adams & A. Adams, 1854
Cassidula sulculosa E.C. Von Martens, 1865
Carychium surai (FOSSIL) Stworzewicz, 1999 †
Melampus tabogensis (C.B. Adams, 1852)
Melampus taeniolatus J.B. Hombron& C.H. Jacquinot, 1854
Melampus taeniolus J.B. Hombron& C.H. Jacquinot, 1854
Carychium tetrodon (FOSSIL) Paladilhe, 1873 †
Carychium thailandicum S. Panha & Burch, 2002
Zospeum tholussum A. Weigand, 2013
Auriculastra tornatelliformis (S.A.A. Petit De La Saussaye, 1842)
Zospeum trebicianum A. Stossich, 1899
Saraphia tridentatum (A. Risso, 1826)
Melampus tridentatus (FOSSIL) Edwards, 1852 †
Pythia trigona (F.H. Troschel, 1840)
Melampus trilineatus C.B. Adams, 1852
Cassidula triparietalis E.C. Von Martens, 1897
Marinula tristanensis M. Connolly, 1915
Melampus triticeus (H.C. Küster, 1844)
Carychium trldentatum (Risso, 1826)
Laemodonta typica (C.B. Adams, 1854)
Melampus typicus H. Adams & A. Adams, 1854
Pythia undatus R.P. Lesson, 1831
Pedipes unisulcatus J.G. Cooper, 1866