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
                 Genus Plesiochactas Pocock, 1900