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 Filibranchia see Subclass Autobranchia Grobben, 1894
                                     Order Pteriomorpha Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944
                                       1 Family Mytilidae Rafinesque, 1815 - marine mussels
                                       2 Family Arcidae Lamarck, 1809 - arks
                                       3 Family Pectinidae Rafinesque, 1815 - scallops
                                       4 Family Ostreidae Rafinesque, 1815 - true oysters
                                       5 Family Anomiidae Rafinesque, 1815 - jingles
                                       6 Family Pinnidae Leach, 1819 - pen clams
                                       7 Family Pteriidae Gray, 1847 (1820) - winged oysters
                                       8 Family Limidae Rafinesque, 1815 - file clams