Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Heteroconchia Gray, 1854 Clade Heterodonta Neumayr, 1884 Order Venerida Gray, 1854 Superfamily Cyrenoidea Gray, 1840 1 Family Cyrenidae Gray, 1840 2 ?Family Glauconomidae Gray, 1853