Subgenus (Cyclocardia) T. A. Conrad, 1867

(3-4-4-0-5-1-3-4-6-0-0-0-0)
Ref. Keen, 1971 p 109
[see under Subfamily: CARDITAMERINAE]

bailyi J. Q. Burch, 1944
(3-4-4-0-5-1-3-4-6-1-0-0-0)
[=Cyclocardia (Cyclocardia) bailyi (J. Q. Burch, 1944)]
Ref. Bernard, 1983 p 34
[see under Subfamily: CARDITAMERINAE]

crebricostata A. Krause, 1885
(3-4-4-0-5-1-3-4-6-2-0-0-0)

nomensis F. S. MacNeil in F. S. MacNeil, J. B. Mertie & H. A. Pilsbry, 1943
(3-4-4-0-5-1-3-4-6-2-1-0-0)
[=Cyclocardia (Cyclocardia) crebricostata (A. Krause, 1885)]
Ref. Bernard, 1983 p 34
[see under Subfamily: CARDITAMERINAE]

spurca G. B. Sowerby, 1833
(3-4-4-0-5-1-3-4-6-3-0-0-0)
Ref. Keen, 1971 p 109

beebei L. G. Hertlein, 1958
(3-4-4-0-5-1-3-4-6-3-1-0-0)
Ref. Keen, 1971 p 109 bw

spurca G. B. Sowerby, 1833
(3-4-4-0-5-1-3-4-6-3-2-0-0)

ventricosa A. A. Gould, 1850
(3-4-4-0-5-1-3-4-6-4-0-0-0)

montereyensis A. G. Smith & M. Gordon, 1948
(3-4-4-0-5-1-3-4-6-4-1-0-0)
[=Cyclocardia (Cyclocardia) ventricosa (A. A. Gould, 1850)]
Ref. Bernard, 1983 p 34
[see under Subfamily: CARDITAMERINAE]