[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Order] Scorpiones Koch, 1837 - scorpions
         [Suborder] †Holosternina Kjellesvig-Waering, 1986
           Superfamily †Palaeoscorpoidea Dunlop, Penney & Jekel, 2010, orth. inval. [monotypic] see Superfamily Palaeoscorpioidea Lehmann, 1944
             Family †Palaeoscorpionidae Lehmann, 1944, orth. inval. [monotypic] see Family Palaeoscorpiidae Lehmann, 1944
               1 Genus †Palaeoscorpius Lehmann, 1944