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
               1 Genus Iurus Thorell, 1876
               2 Genus Paraiurus Francke, 1985, nom. illeg. see Genus Calchas Birula, 1899