Kingdom Animalia Linnaeus, 1758 - animals
Status: extant
   Phylum Arthropoda Siebold, 1848 - arthropods
  Status: extant
     Subphylum Chelicerata Heymons, 1901
    Status: extant
       Class Arachnida Lamarck, 1801
      Status: extant
         Order Scorpiones Koch, 1837 - scorpions
        Status: extant
           Suborder Neoscorpionina Thorell & Lindström, 1885
          Status: extant
             Infraorder Orthosternina Pocock, 1911 see Infraorder Orthosterni Pocock, 1911
            Status: extant
               Family Hormuridae Laurie, 1896
              Status: extant
                 1 Genus †Protoischnurus Carvalho & Lourenço, 2001
                Status: fossil
                 2 Genus Tibetiomachus Lourenço & Qi, 2006
                Status: extant