Phylum Mollusca Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884 Order Venerida Gray, 1854 Superfamily Galeommatoidea Gray, 1840 Family Leptonidae Gray, 1847 see Family Lasaeidae Gray, 1842 Genus Properycina Cerulli-Irelli, 1908