Genus Fragum P. F. Roding, 1798

(3-5-4-0-4-2-3-13-0-0-0-0-0)
Ref. Lindner, 1977 p 110
Syn. Hemicardia L. Spengler, 1799;
Isocardia L. Oken, 1815 [not J. B. P. A. de Lamarck, 1799]
Ref. Vaught, 1989 p 129
Syn. Fragrum J. E. Gray, 1847
Ref. Vokes, 1980 p 128