[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Order] Scorpiones Koch, 1837 - scorpions
         [Suborder] †Meristosternina Kjellesvig-Waering, 1986
           1 Superfamily †Cyclophthalmoidea Thorell & Lindström, 1885
           2 Superfamily †Palaeobuthoidea Kjellesvig-Waering, 1986 [monotypic]