Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Pteriomorphia Beurlen, 1944 Order Arcida Gray, 1854 Superfamily Limopsoidea Dall, 1895 1 Family Limopsidae Dall, 1895 2 Family Philobryidae Bernard, 1897