Class Scorpionida Latreille, 1810 - scorpions
Count: [g†g] 1o;13f;126g; †2o;65g
   Order Scorpiones Koch, 1837 - scorpions
  Count: [g†g] 13f;126g; †43g
     Suborder Neoscorpionina Thorell & Lindström, 1885
    Count: [g†g] 13f;126g; †10g
       Infraorder Orthosterni Pocock, 1911
      Count: [g†g] 13f;126g; †2g
         ?Genus †Palaeopisthacanthus Petrunkevitch, 1913
        Count: -