Subgenus (Trachycardium) O. A. L. Morch, 1853

(3-5-4-0-4-2-6-14-5-0-0-0-0)
Ref. Bernard, 1983 p 38
Keen, 1971 p 153

? angulatum (J. B. P. A. de Lamarck, 1822)
(3-5-4-0-4-2-6-14-5-1-0-0-0)
Angulate Cockle
Ref. Abbott & Dance, 1982 p 328 c

? asiaticum (J. G. Bruguiere, 1792)
(3-5-4-0-4-2-6-14-5-2-0-0-0)
Asiatic Cockle
Ref. Abbott & Dance, 1982 p 330 c

? burchardi (W. Dunker, 1877)
(3-5-4-0-4-2-6-14-5-3-0-0-0)
Burchard's Cockle
Ref. Abbott & Dance, 1982 p 329 c

consors (G. B. Sowerby, 1833)
(3-5-4-0-4-2-6-14-5-4-0-0-0)
Partner Cockle
Ref. Abbott, 1974 p 483
Syn. Trachycardium (Trachycardium) hornelli J. R. Tomlin
Ref. Abbott & Dance, 1982 p 327 c
Syn. Cardium (Cardium) consors G. B. Sowerby, 1833;
Cardium (Trachycardium) consors laxum W. H. Dall, 1901
Ref. Bernard, 1983 p 38 Syn. Cardium (Cardium) laxum W. H. Dall, 1901 Ref. Keen, 1971 p 153 bw c

dulcinea W. H. Dall, 1916
(3-5-4-0-4-2-6-14-5-5-0-0-0)
[=Trachycardium (Mexicardia) procerum (G. B. Sowerby, 1833)]
Ref. Abbott, 1974 p 484

egmontianum (R. J. Shuttleworth, 1856)
(3-5-4-0-4-2-6-14-5-6-0-0-0)
American Prickly Cockle, Florida Pricklycockle, Prickly Cockle
Ref. Abbott, 1974 p 483 c
Abbott & Dance, 1982 p 327 c
Amer. Fish. Soc., 1988 p 39

? elongatum (J. G. Bruguiere, 1789)
(3-5-4-0-4-2-6-14-5-7-0-0-0)
Elongate Cockle
Ref. Abbott & Dance, 1982 p 328 c

? enode (G. B. Sowerby, 1841)
(3-5-4-0-4-2-6-14-5-8-0-0-0)
Enode Cockle
Ref. Abbott & Dance, 1982 p 328 c

flavum (C. v Linne, 1758)
(3-5-4-0-4-2-6-14-5-9-0-0-0)
Pacific Yellow Cockle
Ref. Abbott & Dance, 1982 p 328 c

hawaiiensis G.F. Dolfuss, P. Dautzenberg & H. A. Rehder
(3-5-4-0-4-2-6-14-5-10-0-0-0)
[=Trachycardium (Trachycardium) orbita (G. B. Sowerby, 1833)]
Ref. Abbott & Dance, 1982 p 328

hornelli J. R. Tomlin
(3-5-4-0-4-2-6-14-5-11-0-0-0)
[=Trachycardium (Trachycardium) consors (G. B. Sowerby, 1833)]
Ref. Abbott & Dance, 1982 p 327

isocardia (C. v Linne, 1758) [T]
(3-5-4-0-4-2-6-14-5-12-0-0-0)
Even Cockle, Even Pricklycockle
Ref. Abbott & Dance, 1982 p 327 c
Amer. Fish. Soc., 1988 p 39
Keen, 1971 p 153
Syn. Cardium (Cardium) isocardia C. v Linne, 1758
Ref. Abbott, 1974 p 483 bw

laticostatum G. B. Sowerby, 1833
(3-5-4-0-4-2-6-14-5-13-0-0-0)
[=Trachycardium (Mexicardia) procerum (G. B. Sowerby, 1833)]
Ref. Abbott, 1974 p 484
Abbott & Dance, 1982 p 327

marmoreum J. B. P. A. de Lamarck, 1819
(3-5-4-0-4-2-6-14-5-14-0-0-0)
[=Trachycardium (Acrosterigma) magnum (C. v Linne, 1758)]
Ref. Abbott & Dance, 1982 p 327

? multispinosum (G. B. Sowerby, 1841)
(3-5-4-0-4-2-6-14-5-15-0-0-0)
Many-spined Cockle
Syn. Trachycardium (Trachycardium) pulchricostatum T. Iredale
Ref. Abbott & Dance, 1982 p 328 c
? orbita (G. B. Sowerby, 1833)
(3-5-4-0-4-2-6-14-5-16-0-0-0)
Orbit Cockle
Syn. Trachycardium (Trachycardium) hawaiiensis G. F. Dolfuss, P. Dauztenberg & H. A. Rehder
Ref. Abbott & Dance, 1982 p 328 c

parvulum C. C. Li, 1930
(3-5-4-0-4-2-6-14-5-17-0-0-0)
[=Trachycardium (Mexicardia) procerum (G. B. Sowerby, 1833)]
Ref. Abbott, 1974 p 484

? pectiniforme (I. Born, 1778)
(3-5-4-0-4-2-6-14-5-18-0-0-0)
Fan-shaped Cockle
Ref. Abbott & Dance, 1982 p 328 c

pulchricostatum T. Iredale
(3-5-4-0-4-2-6-14-5-19-0-0-0)
[=Trachycardium (Trachycardium) multispinosum (G. B. Sowerby, 1841)]
Ref. Abbott & Dance, 1982 p 328

? reeveanum (W. Dunker, 1852)
(3-5-4-0-4-2-6-14-5-20-0-0-0)
Reeve's Cockle
Ref. Abbott & Dance, 1982 p 328 c

? rubicundum (L. A. Reeve, 1844)
(3-5-4-0-4-2-6-14-5-21-0-0-0)
Reddish Cockle
Ref. Abbott & Dance, 1982 p 328 c

? serricostatum (J. C. Melvill & R. Standen, 1899)
(3-5-4-0-4-2-6-14-5-22-0-0-0)
Saw-ribbed Cockle
Ref. Abbott & Dance, 1982 p 328 c

? subrugosum (G. B. Sowerby, 1840)
(3-5-4-0-4-2-6-14-5-23-0-0-0)
Subrugose Cockle
Ref. Abbott & Dance, 1982 p 328 c

? unicolor (G. B. Sowerby, 1840)
(3-5-4-0-4-2-6-14-5-24-0-0-0)
Unicolor Cockle
Ref. Abbott & Dance, 1982 p 328 c