Genus Laevicardium W. Swainson, 1840

(3-5-4-0-4-2-4-16-0-0-0-0-0)
Ref. Abbott, 1974 p 485
Abbott & Dance, 1982 p 331
Amer. Fish. Soc., 1988 p 39
Bernard, 1983 p 38
Keen, 1971 p 158
Lindner, 1977 p 110
Syn. Exocardium A. A. Olsson, 1964;
Liocardium J. L. R. Agassiz, 1846
Ref. Vaught, 1989 p 129
Syn. Laevitcartium Lange, 1953;
Levicardium P. P. Carpenter, 1861;
Liocardium J. L. R. Agassiz, 1846;
Loevicardium T. A. Monterosato, 1884
Ref. Vokes, 1980 p 129