life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Arthropoda Siebold, 1848 - arthropods
     Class Arachnida Lamarck, 1801
       Micrura Hansen & Sørensen, 1904
         Megoperculata Börner, 1902
           Tetrapulmonata Shultz, 1990
             Pedipalpi Latreille, 1810
               Camarostomata Petrunkevitch, 1949 see [unranked] Uropygi Thorell, 1882
                 1 Order Uropygi Thorell, 1882 - whip scorpions see [unranked] Uropygi Thorell, 1882
                 2 Order Schizomida Petrunkevitch, 1945 - schizomids