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
                             Rhacopoda see [unranked] Conchifera Gegenbaur, 1878
                               Class Gastropoda Cuvier, 1795 - snails and slugs
                                 opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
                                   1 Suborder Cephalaspidea Fischer, 1883 - bubble snails see Order Cephalaspidea Fischer, 1883
                                   1.0 Suborder Bullomorpha see Suborder Cephalaspidea Fischer, 1883
                                   2 Suborder Anaspidea P. Fischer, 1883 - sea hares see Order Anaspidea Fischer, 1883
                                   3 Suborder Thecosomata Blainville, 1824 - shelled pteropods
                                   4 Suborder Gymnosomata Blainville, 1824 - naked pteropods
                                   5 Suborder Nudibranchia Cuvier, 1814 - sea slugs see Order Nudibranchia Cuvier, 1814
                                   6 Suborder Sacoglossa Ihering, 1876 see Order Sacoglossa Ihering, 1876
                                   6.0 Ascoglossa see Suborder Sacoglossa Ihering, 1876
                                   7 Suborder Acochlidiacea Odhner, 1937 see Order Acochlidia Odhner, 1937
                                   8 Suborder Notaspidea Fischer, 1883
                                   8.0 Suborder Pleurobrancheomorpha see Suborder Notaspidea Fischer, 1883