Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Heteroconchia Gray, 1854 Clade Heterodonta Neumayr, 1884 Order Carditida Dall, 1889 Superfamily Crassatelloidea Férussac, 1822 Family Crassatellidae Férussac, 1822 Subfamily Scambulinae Chavan, 1952