[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Appendiculata {Lankester}
         Branch Gnathopoda Straus-Durkheim, 1829
           Grade Condylopoda
             Class Arachnida Lamarck, 1801
               Branch Tracheopulmonata
                 1 Order Scorpionidea
                 2 Order Pedipalpa
                 3 Order Galeodea
                 4 Order Araneida Clerck, 1757 see Order Araneae Clerck, 1757
                 5 Order Phalangida Bristowe, 1949
                 6 Order Acarina Baraud, 1965 see Order Acari Leach, 1817