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 Fraginae Stewart, 1930
Genus Ctenocardia Adams & Adams, 1857
Subgenus Microfragum Habe, 1951