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 Scaphopoda Bronn, 1862 - tusk shells
                                 Order Gadilida Starobogatov, 1974
                                   1 Genus Cadulus Philippi, 1844
                                   2 Genus Costentalina Chistikov, 1982
                                   3 Genus Entalina Monterosato, 1872
                                   4 Genus Gadila Gray, 1847
                                   5 Genus Polyschides Pilsbry & Sharp, 1898
                                   6 Genus Pulsellum Stoliczka, 1868
                                   7 Genus Solenoxiphus Chistikov, 1983