Genus Microcardium J. Thiele, 1934

(3-5-4-0-4-2-5-17-0-0-0-0-0)
Ref. Bernard, 1983 p 38
Lindner, 1977 p 110
Vokes, 1980 p 129
[see also as Subgenus under Genus Nemocardium]
Ref. Abbott, 1974 p 485
Keen, 1971 p 158

delicatulum (E. A. Smith, 1915)
(3-5-4-0-4-2-5-17-0-1-0-0-0)
Syn. Cardium (Cardium) delicatulum E. A. Smith, 1915
Ref. Bernard, 1983 p 38

panamensis (W. H. Dall, 1908)
(3-5-4-0-4-2-5-17-0-2-0-0-0)
Syn. Microcardium williami E. Fischer-Piette, 1977;
Protocardium panamensis W. H. Dall, 1908 [not Cardium panamense G. B. Sowerby, 1833]
Ref. Bernard, 1983 p 38

pazianum (W. H. Dall, 1916)
(3-5-4-0-4-2-5-17-0-3-0-0-0)
Syn. Protocardia paziana W. H. Dall, 1916
Ref. Bernard, 1983 p 38

williami E. Fischer-Piette, 1977
(3-5-4-0-4-2-5-17-0-4-0-0-0)
[=Microcardium panamensis (W. H. Dall, 1908)]
Ref. Bernard, 1983 p 38