Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
       Order Myida Stoliczka, 1870
         Suborder Pholadina Newell, 1965 see Superfamily Pholadoidea Lamarck, 1809
           Superfamily Pholadoidea Lamarck, 1809
             1 Family Pholadidae Lamarck, 1809 - piddocks
             2 Family Xylophagaidae Turner, 1969, nom. illeg. see Family Xylophagaidae Purchon, 1941
             3 Family Teredinidae Rafinesque, 1815 - shipworms