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 Arthropoda Siebold, 1848 - arthropods
           Subphylum Chelicerata Heymons, 1901
             Class Arachnida Lamarck, 1801
               01 Order Scorpiones Koch, 1837 - scorpions
               02 Order Uropygi Thorell, 1882 - whip scorpions see [unranked] Uropygi Thorell, 1882
               03 Order Schizomida Petrunkevitch, 1945 - schizomids
               04 Order Amblypygi Thorell, 1883 - whip spiders
               05 Order Palpigradi Thorell, 1888 - palpigrades
               06 Order Araneae Clerck, 1757 - spiders
               07 Order Ricinulei Thorell, 1876 - ricinuleids
               08 Order Pseudoscorpionida Latreille, 1817 - false scorpions see Order Pseudoscorpiones De Geer, 1778
               09 Order Solpugida - solpugids see Order Solifugae Sundevall, 1833
               10 Order Opiliones Sundevall, 1833 - harvestmen
               11 Subclass Acari Leach, 1817 - mites and ticks