Chelicerata Heymons, 1901
   Scorpiones Koch, 1837 - scorpions
     †Lobosternina Pocock, 1911
       Superfamily †Isobuthoidea Petrunkevitch, 1913
         Family †Eoscorpiidae Scudder, 1884
           1 Genus †Eoscorpius Meek & Worthen, 1868
           2 Genus †Eskiscorpio Kjellesvig-Waering, 1986
           2.0 [Genus Eskioscorpio Dunlop, Brauckmann & Steur, 2008, orth. inval.] see Genus Eskiscorpio Kjellesvig-Waering, 1986
           3 Genus †Trachyscorpio Kjellesvig-Waering, 1986