Class Scorpionida Latreille, 1810 - scorpions
   Order Scorpiones Koch, 1837 - scorpions
     Suborder Neoscorpionina Thorell & Lindström, 1885
       Infraorder Orthosterni Pocock, 1911
         Superfamily Chactoidea Pocock, 1893
           1 Family Chactidae Pocock, 1893
           2 Family Euscorpiidae Laurie, 1896
           3 Family Scorpiopsidae Kraepelin, 1905, orth. inval. see Family Scorpiopidae Kraepelin, 1905