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 Crassatelloidea Férussac, 1822 [monotypic] Family Crassatellidae Férussac, 1822 1 Subfamily Crassatellinae Férussac, 1822 2 Subfamily Scambulinae Chavan, 1952 [monotypic]