[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Order] Scorpiones Koch, 1837 - scorpions
         Suborder Neoscorpionina Thorell & Lindström, 1885
           Infraorder Orthosterni Pocock, 1911
             Parvorder Iurida Soleglad & Fet, 2003
               1 Superfamily Iuroidea Thorell, 1876 [monotypic]
               2 Superfamily Bothriuroidea Simon, 1880 [monotypic]
               3 Superfamily Caraboctonoidea Kraepelin, 1905 [monotypic]
               4 Superfamily Chactoidea Pocock, 1893
               5 Superfamily Hadruroidea Stahnke, 1974 [monotypic]
               6 Superfamily Vaejovoidea Thorell, 1876 [monotypic]
               7 Superfamily Scorpionioidea Dunlop, Penney & Jekel, 2010, orth. inval. see Superfamily Scorpionoidea Latreille, 1802