[Subphylum] [Chelicerata] Heymons, 1901
   1 [Order] Xiphosura Latreille, 1802 see Class Xiphosura Latreille, 1802
   2.1 [Order] Scorpiones Koch, 1837 - scorpions
   2.2.1 [Order] Pedipalpi Borner, 1904 see Order Uropygi Thorell, 1882
   2.2.2.1 Order †Uraraneida Selden & Shear, 2008
   2.2.2.2.1 Genus †Chimerarachne Wang, Dunlop, Selden, Garwood, Shear, Müller & Lei, 2018
   2.2.2.2.2 [Order] Araneae Clerck, 1757 - spiders see Suborder Araneae Clerck, 1757