Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         Order Scorpiones Koch, 1837 - scorpions
           Suborder †Branchioscorpionina Kjellesvig-Waering, 1986
             Infraorder †Lobosternina Pocock, 1911 see Suborder Lobosternina Pocock, 1911
               1 Superfamily †Isobuthoidea Petrunkevitch, 1913
               2 Superfamily †Loboarchaeoctonoidea Kjellesvig-Waering, 1986 [monotypic]
               3 Superfamily †Palaeophonoidea Thorell & Lindström, 1885 [monotypic]
               4 Superfamily †Paraisobuthoidea Kjellesvig-Waering, 1986
               5 Superfamily †Pseudobuthiscorpioidea Kjellesvig-Waering, 1986