Class Scorpionida Latreille, 1810 - scorpions
   Order †Palaeoscorpiones (Stockwell, 1989)
     Superfamily †Archaeoctonoidea Petrunkevitch, 1949
       1 Genus †Archaeoctonus Pocock, 1911
       2 Genus †Pseudoarchaeoctonus Kjellesvig-Waering, 1986
       3 Genus †Loboarchaeoctonus Kjellesvig-Waering, 1986