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 Veneroidea Rafinesque, 1815 Family Cooperellidae Dall, 1900 [monotypic] see Subfamily Petricolinae d'Orbigny, 1840 1 Genus Cooperella Carpenter, 1864