Order Scorpiones Koch, 1837 - scorpions
   Suborder Neoscorpiones Thorell & Lindström, 1885 see Suborder Neoscorpionina Thorell & Lindström, 1885
     Infraorder Orthosterni Pocock, 1911
       Parvorder Iurida Soleglad & Fet, 2003
         Superfamily Chactoidea Pocock, 1893
           Family Euscorpiidae Laurie, 1896
             1 Subfamily Euscorpiinae Laurie, 1896 see Family Euscorpiidae Laurie, 1896
             2 Subfamily Megacorminae Kraepelin, 1905 see Family Euscorpiidae Laurie, 1896
             3 Subfamily Scorpiopinae Kraepelin, 1905 see Family Scorpiopidae Kraepelin, 1905