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 Arthropoda Siebold, 1848 - arthropods
           Subphylum Chelicerata Heymons, 1901
             Class Pycnogonida Latreille, 1810 - pycnogonids
               Family Nymphonidae Wilson, 1878
                 1 Genus Nymphon Fabricius, 1794
                 2 Genus Pentanymphon Hodgson, 1904
                 3 Genus Sexanymphon Hedgpeth & Fry, 1964