Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
   Opisthokonta Cavalier-Smith, 1987 - opisthokonts see Clade Opisthokonta Cavalier-Smith 1987, nom. cl. inval.
     Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
       Eumetazoa Bütschli, 1910 - eumetazoans
         Triploblastica see [unranked] Bilateria Hatschek, 1888
           Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
             Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
               Lophotrochozoa Halanych, Bacheller, Aguinaldo, Liva, Hillis & Lake 1995 - lophotrochozoans
                 Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
                   Trochozoa Beklemischev, 1944 - trochozoans
                     Phylum Mollusca Linnaeus, 1758 - molluscs
                       Eumollusca
                         Conchifera Gegenbaur, 1878 see Subphylum Conchifera Gegenbauer, 1878
                           Ganglioneura Rudophi, 1812
                             Ancyropoda see [unranked] Conchifera Gegenbaur, 1878
                               Class Bivalvia Linnaeus, 1758 - bivalves
                                 Subclass Metabranchia see Subclass Autobranchia Grobben, 1894
                                   Superorder Eulamellibranchia see Superorder Heteroconchia Gray, 1854
                                     Order Myoida Stoliczka, 1870 see Order Myida Stoliczka, 1870
                                       Family Pholadidae Lamarck, 1809 - piddocks
                                         1 Genus Martesia Sowerby, 1824
                                         2 Genus Barnea Risso, 1826
                                         3 Genus Chaceia Turner, 1955
                                         4 Genus Cyrtopleura Tryon, 1862
                                         5 Genus Penitella Valenciennes, 1846
                                         6 Genus Pholas Linnaeus, 1758
                                         7 Genus Xylophaga Turton, 1822
                                         8 Genus Zirphaea Gray, 1852, orth. inval. see Genus Zirfaea Gray, 1842