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
           Class Caudofoveata Boettger, 1956 - caudofoveatans
             1 Family Limifossoridae Salvini-Plawen, 1968
             2 Family Prochaetodermatidae Salvini-Plawen, 1968
             3 Family Chaetodermatidae von Ihering, 1786