Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Pteriomorphia Beurlen, 1944 Order Ostreida Férussac, 1822 [monotypic] Superfamily Ostreoidea Rafinesque, 1815 Family †Arctostreidae Vialov, 1983 Subfamily †Arctostreinae Vialov, 1983