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 Glossoidea Gray, 1847 (1840)
           Family Trapeziidae Lamy, 1920, nom. illeg. see Family Trapezidae Lamy, 1920 (1895), orth. cons.
             1 Genus Trapezium Megerle von Mühlfeld, 1811
             2 Genus Coralliophaga Blainville, 1824
             3 Genus Fluviolanatus Iredale, 1924
             4 Genus Straelenotrapezium Glibert & van de Poel, 1970