Phylum Mollusca Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884 Order Venerida Gray, 1854 Superfamily Lucinoidea Fleming, 1828 Family Cyrenoididae Adams & Adams, 1857 (1853) [monotypic] Genus Cyrenoida Joannis, 1835