Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Pteriomorphia Beurlen, 1944 Order Mytilida Férussac, 1822 Superfamily Mytiloidea Rafinesque, 1815 1 Family Mytilidae Rafinesque, 1815 - marine mussels 2 Family †Mysidiellidae Cox, 1964