Phylum Mollusca Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884 Order Venerida Gray, 1854 Order Chamida see Order Venerida Gray, 1854 Order Myida Stoliczka, 1870 ?[Order Hippuritoida]