Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Superphylum Articulata Cuvier see Supraphylum Articulata Cuvier
           Phylum Arthropoda Siebold, 1848 - arthropods
             Subphylum Chelicerata Heymons, 1901
               Class Arachnida Lamarck, 1801
                 1 Order Scorpiones Koch, 1837 - scorpions
                 2 Order Pedipalpi Borner, 1904 see Order Uropygi Thorell, 1882
                 3 Order Palpigradi Thorell, 1888 - palpigrades
                 4 Order Araneae Clerck, 1757 - spiders
                 5 Order Ricinulei Thorell, 1876 - ricinuleids
                 6 Order Pseudoscorpiones De Geer, 1778
                 7 Order Solifuga
                 8 Order Phalangida Bristowe, 1949
                 9 Order Acari Leach, 1817 - mites, ticks and chiggers see Subclass Acari Leach, 1817