living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Mollusca Linnaeus, 1758 - molluscs
           1 Class Caudofoveata Boettger, 1956 - caudofoveatans
           2 Class Solenogastres Gegenbaur, 1878
           3 Class Polyplacophora Blainville, 1816 - chitons
           4 Class Monoplacophora Odhner, 1940 - monoplacophorans
           5 Class Gastropoda Cuvier, 1795 - snails and slugs
           6 Class Cephalopoda Cuvier, 1795 - cephalopods
           7 Class Bivalvia Linnaeus, 1758 - bivalves
           8 Class Scaphopoda Bronn, 1862 - tusk shells