Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Pteriomorphia Beurlen, 1944 Order Pectinida Gray, 1854 Superfamily †Pterinopectinoidea Newell, 1938 1 Family †Pterinopectinidae Newell, 1938 2 Family †Natalissimidae Waterhouse, 2008