Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Cheliceriformes
       Class Chelicerata Heymons, 1901
         Subclass Arachnida Lamarck see Class Arachnida Lamarck, 1801
           Order Araneae Clerck, 1757 - spiders see Suborder Araneae Clerck, 1757
             1 Suborder Mesothelae Pocock, 1892 - segmented spiders see Infraorder Mesothelae Pocock, 1892
             2 Suborder Opisthothelae Pocock, 1892 - modern spiders see Infraorder Opisthothelae Pocock, 1892