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 Trigoniocardia Dall, 1900
Subgenus Americardia Stewart, 1930