Phylum Mollusca Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884 Order Chamida see Order Venerida Gray, 1854 Superfamily Donacoidea Fleming, 1828 [monotypic] see Superfamily Tellinoidea Blainville, 1814 Family Donacidae Fleming, 1828 - wedge shells Genus Galatea Bruguière, 1797