living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Status: extant
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
  Status: extant
     Kingdom Animalia Linnaeus, 1758 - animals
    Status: extant
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
      Status: extant
         Phylum Arthropoda Siebold, 1848 - arthropods
        Status: extant
           Subphylum Chelicerata Heymons, 1901
          Status: extant
             Class Pycnogonida Latreille, 1810 - pycnogonids
            Status: extant
               Family Nymphonidae Wilson, 1878
              Status: extant
                 1 Genus Nymphon Fabricius, 1794
                Status: extant
                 2 Genus Pentanymphon Hodgson, 1904
                Status: extant
                 3 Genus Sexanymphon Hedgpeth & Fry, 1964
                Status: extant