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 Kinorhyncha Reinhard, 1887 - kinorhynchs
           Order Homalorhagida Zelinka, 1896
             Suborder Homalorhagae Zelinka, 1896
               Family Pycnophyidae Zelinka, 1896
                 Genus Pycnophyes Zelinka, 1907