life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Empire Eukaryota (Chatton, 1925) see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Bilateria Hatschek, 1888 [paraphyletic?] - bilaterians
         Branch Protostomia Grobben, 1908 [paraphyletic?] - protostomes see Infrakingdom Protostomia Grobben, 1908
           Infrakingdom Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake, 1997 - ecdysozoans see Superphylum Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake, 1997
             Superphylum Haemopoda T. Cavalier-Smith, 1998 see Superphylum Panarthropoda Nielsen, 1995
               Phylum Arthropoda Siebold, 1848 - arthropods
                 Subphylum Cheliceromorpha Boudraux, 1978 see Subphylum Chelicerata Heymons, 1901
                   Infraphylum Pycnogonida Latreille, 1810 see Class Pycnogonida Latreille, 1810
                     Genus Nymphon Fabricius, 1794