Class Scorpionida Latreille, 1810 - scorpions
   Order Scorpiones Koch, 1837 - scorpions
     Suborder Neoscorpionina Thorell & Lindström, 1885
       Infraorder Orthosterni Pocock, 1911
         Superfamily Vaejovoidea Thorell, 1876
           Family Iuridae Thorell, 1876
             1 Subfamily Iurinae Thorell, 1876 see Family Iuridae Thorell, 1876
             2 Subfamily Caraboctoninae Kraepelin, 1905 see Family Caraboctonidae Kraepelin, 1905
             3 Subfamily Hadrurinae Stahnke, 1974 see Family Hadruridae Stahnke, 1974