Subgenus (Byssomera) A. A. Olsson, 1961

(3-4-4-0-5-1-3-4-2-0-0-0-0)
Ref. Bernard, 1983 p 33
Keen, 1971 p 107
Vaught, 1989 p 128

affinis G. B. Sowerby, 1833
(3-4-4-0-5-1-3-4-2-1-0-0-0)
Syn. Cardita (Cardita) californica G. P. Deshayes, 1854;
Cardita (Cardita) incrassatus P. P. Carpenter, 1857;
Cardita (Cardita) nodulosa authors [not J. B. P. A. de Lamarck, 1819];
Cardita (Cardita) rufescens authors [not J. B. P. A. de Lamarck, 1819];
Cardita (Cardita) volucris L. A. Reeve, 1843
Ref. Bernard, 1983 p 33
Syn. Cardita (Cardita) californica G. P. Deshayes, 1854;
"Cardita modulosa Lamarck" A. Valenciennes, 1846, not Cardita nodulosa J. B. P. A. de Lamarck, 1819
Ref. Keen, 1971 p 107 bw