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 Mactroidea Lamarck, 1809
           Family Mesodesmatidae Gray, 1840
             Subfamily Mesodesmatinae Gray, 1840
               1 Genus Paphies Lesson, 1831
               2 Genus Atactodea Dall, 1895