Phylum Mollusca Linnaeus, 1758 - molluscs
Class Bivalvia Linnaeus, 1758 - bivalves
Subclass Heterodonta Neumayr, 1884
see Clade Heterodonta Neumayr, 1884
Order Chamida
see Order Venerida Gray, 1854
Superfamily Cardioidea Lamarck, 1809
Family Cardiidae Lamarck, 1809 - cockles
Subfamily Cardiinae Lamarck, 1809
Genus Cardium Linnaeus, 1758
1 Subgenus Cardium Linnaeus, 1758
2 Subgenus Bucardium Gray, 1853
3 Subgenus Orthocardium Tremlett, 1950