Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Pteriomorphia Beurlen, 1944 Order Pteriida Newell, 1965 Superfamily †Ambonychioidea Miller, 1877 Family †Alatoconchidae Termier, Termier & de Lapparent, 1974