Genus Tropidocardium E. Romer, 1868
(3-4-4-0-4-2-1-60-0-0-0-0-0) [=Cardium C. v Linne, 1758] Ref. Vaught, 1989 p 129 Syn. Tropicardium H. B. Preston, 1916 [=Cardium C. v Linne, 1758] Ref. Vokes, 1980 p 127