[Panarthropoda] Nielsen, 1995 - panarthropods
   Arthropoda Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848
     Chelicerata Heymons, 1901 see Superclass Chelicerata Heymons, 1901
       Euchelicerata Weygoldt & Paulus, 1979
         Arachnida Cuvier, 1812 see Class Arachnida Lamarck, 1801
           Pseudoscorpiones De Geer, 1778 see Order Pseudoscorpiones De Geer, 1778