Crassatella subplana (FOSSIL) J.P.J. Ravn †
Crassatella subquadrata G.B. II Sowerby, 1870
Crassatella subregularis (FOSSIL) J.H.F. Douvillé, 1916 †
Chattina suduirauti (K.L. Lamprell, 2003)
Crassatella sulcata (FOSSIL) D.C. Solander, 1866 †
Marvacrassatella surryensis (FOSSIL) (W.C. Mansfield, 1929 †)
Crassatella symmetrica Weijden, 1943
Crassinella tanicus (FOSSIL) (W.H. Dall, 1900 †)
Pachythaerus tealli (FOSSIL) Casey †
Bathytormus tenuistria (FOSSIL) (G.P. Deshayes, 1824 †)
Bathytormus tenuistria grignonensis (FOSSIL) (G.P. Deshayes, 1857 †)
Cypricardella tenuistriata (FOSSIL) J.W. Hall& R.P. Whitfield, 1869 †
Hybolophus terrestris (FOSSIL) DeVries, 2016 †
Crassatella texalta (FOSSIL) G.F. Harris, 1895 †
Crassatella thallavignesi (FOSSIL) G.P. Deshayes, 1857 †
Salaputium tinopaica (FOSSIL) C.R. Laws, 1939 †
Tilicrassatella torrens (FOSSIL) DeVries, 2016 †
Spissatella trailli (FOSSIL) (F.W. Hutton, 1873 †)
Cypricardella trapezoidalis (FOSSIL) Reed, 1944 †
Crassatina triangularis (FOSSIL) (J.B.P.A. Lamarck,1805 †)
Crassatella trigonata (FOSSIL) J.B.P.A. Lamarck †
Hybolophus trinitaria (FOSSIL) (C.J. Maury, 1925 †)
Crassatina triquetra (L.A. Reeve, 1842)
Chattina truncata (C.B. Adams, 1854)
Hybolophus tuberus (FOSSIL) (A.A. Olsson, 1964 †)
Crassatella tumidula (FOSSIL) R.P. Whitfield, 1865 †
Marvacrassatella turgidula (FOSSIL) (T.A. Conrad, 1843 †)
Crassatella undulata (FOSSIL) T. Say, 1824 †
Crassatella unioides (FOSSIL) (Stanton †)
Marvacrassatella urbannensis (FOSSIL) (W.C. Mansfield, 1929 †)
Crassatella uruguayensis E.A. Smith, 1880
Eucrassatella utcholokensis (FOSSIL) Krishtofovich, 1947 †
Crassatella uvasana (FOSSIL) T.A. Conrad, 1855 †
Crassatella vadosa (FOSSIL) Morton, 1834 †
Crassinella variabilis (FOSSIL) D.T. Dockery, 1982 †