Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Cheliceriformes
       Class Chelicerata Heymons, 1901
         Subclass Arachnida Lamarck see 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 Order Acari Leach, 1817 - mites, ticks and chiggers see Subclass Acari Leach, 1817