Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Pteriomorphia Beurlen, 1944 Order Pectinida Gray, 1854 Superfamily †Pseudomonotoidea Newell, 1938 Family †Hunanopectinidae Yin, 1985 Subfamily †Leptochondriinae Newell & Boyd, 1995