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 Nemathelminthes Gegenbaur, 1859 [monotypic] see Superphylum Aschelminthes
               Phylum Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859
                 Subphylum Nematoida Rudolphi, 1808
                   1 Infraphylum Nematoda Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859
                   2 Infraphylum Nematomorpha (Vejovsky, 1886) Cavalier-Smith, 1998 see Phylum Nematomorpha Vejdovsky, 1886