Sassia semitorta J.T. Kuroda & T. Habe,1961
Cymatiella sexcostata (R. Tate, 1888)
Ranularia sinensis (L.A. Reeve, 1844)
Cabestana spengleri (G. Perry, 1811)
Charonia spinosum (FOSSIL) (M. Rouault, 1849 †)
Ranularia springsteeni (A.G. Beu, 1987)
Charonia subcorrugatum (FOSSIL) (A.V.M.D. D'Orbigny,1852 †)
Charonia subcorrugatum? (Orbigny, 1852)
Sassia subdistorta (J.B.P.A. Lamarck, 1822)
Gyrineum subgranulatus (FOSSIL) (Orbigny, 1852 †)
Charonia subspinosum (FOSSIL) (J.P.S. Grateloup,1833 †)
Gelagna succincta (C. Linnaeus, 1771)
Cabestana tabulata (K.T. Menke, 1843)
Fusitriton takedai T. Habe, 1979
Charonia tarbelliana (FOSSIL) (J.P.S. Grateloup,1848 †)
Charonia tarbelliana transiens (FOSSIL) Baldi, 1973 †
Sassia tatei (FOSSIL) A.G. Beu, 2010 †
Turritriton tenuiliratus (C.E. Lischke, 1873)
Turritriton tenuiliratus fittkaui M. Parth, 1991
Ameranella terrysmithae (FOSSIL) (C.J.S. Hickman, 1980 †)
Antarctiranella tessela (FOSSIL) J.D. Stilwell & al.,2004 †
Ranularia testudinaria (A. Adams & L.A. Reeve,1850)
Cabestana tetleyi (FOSSIL) (Powell & J.A. Bartrum,1929 †)
Sassia textilis (FOSSIL) R. Tate, 1888 †
Monoplex thersites (L.A. Reeve, 1844)
Cymatium tigrinum (W.J. Broderip, 1833)
Sassia tortirostris (FOSSIL) R. Tate, 1888 †
Monoplex tranquebaricus J.B.P.A. Lamarck, 1816
Charonia triangula (FOSSIL) Vasseur, 1881 †
Monoplex trigonus (J.F. Gmelin, 1791)
Ranularia trilineata (L.A. Reeve, 1844)
Ranularia tripa (J.B.P.A. Lamarck, 1822)
Cymatiella tritonea (FOSSIL) (J.P.S. Grateloup,1840 †)
Charonia tritonis (C. Linnaeus, 1758)
Ranella tubercularis (FOSSIL) A. Risso, 1826 †