Subgenus (Megapitaria) U. S. Grant & H. R. Gale, 1931

(3-4-4-0-26-7-11-61-3-0-0-0-0)
Ref. Abbott, 1974 p 532
[see also as Genus]

aurantiaca (G. B. Sowerby, 1831) [T]
(3-4-4-0-26-7-11-61-3-1-0-0-0)
Ref. Abbott, 1974 p 532

maculata (C. v Linne, 1758)
(3-4-4-0-26-7-11-61-3-2-0-0-0)
Calico Clam
Ref. Abbott, 1974 p 532
Abbott & Dance, 1982 p 359 c
Amer. Fish. Soc., 1988 p 44

squalida (G. B. Sowerby, 1835)
(3-4-4-0-26-7-11-61-3-3-0-0-0)
Syn. Macrocallista (Macrocallista) biradiata J. E. Gray, 1838;
Macrocallista (Macrocallista) chionacea K. T. Menke, 1847
Ref. Abbott, 1974 p 532