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 Lymnocardiidae Stoliczka, 1870 see Subfamily Lymnocardiinae Stoliczka, 1870 Genus Adacna Eichwald, 1838