Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Superclass Chelicerata Heymons, 1901 see Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         01 Order Scorpionida Latreille, 1817 see Class Scorpionida Latreille, 1810
         02 Order Pseudoscorpionida Latreille, 1817 - false scorpions see Order Pseudoscorpiones De Geer, 1778
         03 Order Phalangiida see Order Opiliones Sundevall, 1833
         04 Order †Architarbida Petrunkevitch, 1945 see Order Phalangiotarbida Haase, 1890
         05 Order Acarida see Order Acari Leach, 1817
         06 Order †Haptopodida see Order Haptopoda Pocock, 1911
         07 Order †Anthracomartida Karsch, 1882 see Order Trigonotarbida Petrunkevitch, 1949
         08 Order †Trigonotarbida Petrunkevitch, 1949
         09 Order Palpigradida see Order Palpigradi Thorell, 1888
         10 Order Thelyphonida Latreille, 1804
         11 Order Schizomida Petrunkevitch, 1945 - schizomids
         12 Order †Kustarachnida Petrunkevitch, 1913 see Order Opiliones Sundevall, 1833
         13 Order Phrynichida see Order Amblypygi Thorell, 1883
         14 Order Araneida Clerck, 1757 see Order Araneae Clerck, 1757
         15 Order Solpugida - solpugids see Order Solifugae Sundevall, 1833
         16 Order Ricinuleida see Order Ricinulei Thorell, 1876