Family: CRASSATELLIDAE Ferussac, 1822

(3-4-4-0-10-3-0-0-0-0-0-0-0)
Ref. Abbott, 1974 p 481
Abbott & Dance, 1982 p 325
Bernard, 1983 p 36
Keen, 1971 p 103
Lindner, 1977 p 109
Vaught, 1989 p xi,128
Vokes, 1980 p 123,243