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
             Subfamily Megacorminae Kraepelin, 1905 see Family Euscorpiidae Laurie, 1896
               Tribe Megacormini Kraepelin, 1905 see Family Euscorpiidae Laurie, 1896
                 1 Genus Megacormus Karsch, 1881
                 2 Genus Plesiochactas Pocock, 1900