living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryotae see Domain Eukaryota Chatton, 1925
     Animalia Linnaeus, 1758 - animals
       Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Arthropoda Siebold, 1848 - arthropods
           Chelicerata Heymons, 1901
             Arachnida Lamarck, 1801
               Palpigradi Thorell, 1888 - palpigrades
                 Eukoeneniidae Petrunkevitch, 1955
                   Leptokoenenia Condé, 1965