Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         Order Scorpiones Koch, 1837 - scorpions
           Suborder †Branchioscorpionina Kjellesvig-Waering, 1986
             Infraorder †Lobosternina Pocock, 1911 see Suborder Lobosternina Pocock, 1911
               Superfamily †Isobuthoidea Petrunkevitch, 1913
                 1 Family †Eobuthidae Kjellesvig-Waering, 1986
                 2 Family †Eoscorpiidae Scudder, 1884
                 3 Family †Isobuthidae Petrunkevitch, 1913
                 4 Family †Kronoscorpionidae Kjellesvig-Waering, 1986
                 5 Family †Pareobuthidae Kjellesvig-Waering, 1986