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 3 Genus †Trachyscorpio Kjellesvig-Waering, 1986