Crassatella subplana (FOSSIL) J.P.J. Ravn † Ukraine
Crassatella subquadrata G.B. II Sowerby, 1870 South Africa, Hout Bay34,4 mm
Crassatella subregularis (FOSSIL) J.H.F. Douvillé, 1916 † Egypt, Hasna
Chattina suduirauti (K.L. Lamprell, 2003) Philippines, Aliguay Island18 mm
Crassatella sulcata (FOSSIL) D.C. Solander, 1866 † Somalia, Baghenda
Marvacrassatella surryensis (FOSSIL) (W.C. Mansfield, 1929 †) USA, Virginia, Surry
Crassatella symmetrica Weijden, 1943
Crassinella tanicus (FOSSIL) (W.H. Dall, 1900 †) Florida3 mm
Pachythaerus tealli (FOSSIL) Casey † UK, England, Bedfordshire
Bathytormus tenuistria (FOSSIL) (G.P. Deshayes, 1824 †) France, Paris Basin
Bathytormus tenuistria grignonensis (FOSSIL) (G.P. Deshayes, 1857 †) France, Paris Basin
Cypricardella tenuistriata (FOSSIL) J.W. Hall& R.P. Whitfield, 1869 † France, Paris Basin26 mm
Hybolophus terrestris (FOSSIL) DeVries, 2016 † Peru, Ica, Pisco80 mm
Crassatella texalta (FOSSIL) G.F. Harris, 1895 † United States, Alabama, Choctaw
Crassatella thallavignesi (FOSSIL) G.P. Deshayes, 1857 † France, Paris Basin52 mm
Salaputium tinopaica (FOSSIL) C.R. Laws, 1939 †
Tilicrassatella torrens (FOSSIL) DeVries, 2016 † Peru, Ica, Pisco
Spissatella trailli (FOSSIL) (F.W. Hutton, 1873 †) New Zealand, South Island42 mm
Cypricardella trapezoidalis (FOSSIL) Reed, 1944 † Pakistan, Punjab, Sargodha
Crassatina triangularis (FOSSIL) (J.B.P.A. Lamarck,1805 †) France, Paris Basin15 mm
Crassatella trigonata (FOSSIL) J.B.P.A. Lamarck † France, Brittany13 mm
Hybolophus trinitaria (FOSSIL) (C.J. Maury, 1925 †) Colombia, La Chorrera
Crassatina triquetra (L.A. Reeve, 1842) Guinea Bissau28 mm
Chattina truncata (C.B. Adams, 1854) Philippines, Mactan Island4,4 mm
Hybolophus tuberus (FOSSIL) (A.A. Olsson, 1964 †) Colombia
Crassatella tumidula (FOSSIL) R.P. Whitfield, 1865 † USA, Alabama, Butler
Marvacrassatella turgidula (FOSSIL) (T.A. Conrad, 1843 †) Maryland, Calvert County
Crassatella undulata (FOSSIL) T. Say, 1824 † USA, North Carolina
Crassatella unioides (FOSSIL) (Stanton †) Eastern Kamchatka
Marvacrassatella urbannensis (FOSSIL) (W.C. Mansfield, 1929 †) USA, Virginia, Surry
Crassatella uruguayensis E.A. Smith, 1880 Brazil
Eucrassatella utcholokensis (FOSSIL) Krishtofovich, 1947 † Western Kamchatka
Crassatella uvasana (FOSSIL) T.A. Conrad, 1855 † USA, California, Orange
Crassatella vadosa (FOSSIL) Morton, 1834 † Tennessee53 mm
Crassinella variabilis (FOSSIL) D.T. Dockery, 1982 † USA, Mississippi3 mm