Phylum Mollusca Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884 Order Venerida Gray, 1854 Superfamily Chlamydoconchoidea Dall, 1884 [monotypic] see Superfamily Galeommatoidea Gray, 1840 1 Family Chlamydoconchidae Dall, 1884 [monotypic] see Family Galeommatidae Gray, 1840