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
             Subfamily Iurinae Thorell, 1876 see Family Iuridae Thorell, 1876
               Genus Paraiurus Francke, 1985, nom. illeg. see Genus Calchas Birula, 1899