Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Pteriomorphia Beurlen, 1944 Order Pectinida Gray, 1854 Superfamily †Heteropectinoidea Beurlen, 1954 1 Family †Heteropectinidae Beurlen, 1954 2 Family †Acanthopectinidae Newell & Boyd, 1995 3 Family †Annuliconchidae Astafieva, 1995 4 Family †Limipectinidae Newell & Boyd, 1990