Chelicerata Heymons, 1901
Count: 2c;12o; †6o;2f;23g
   Scorpiones Koch, 1837 - scorpions
  Count: [g†g] 15f;5g; †43f;92g [27 Dec 2020]
     †Holosternina Kjellesvig-Waering, 1986
    Count: [†g] †18f;24g [27 Dec 2020]
       Superfamily †Gigantoscorpionoidea Kjellesvig-Waering, 1986 [monotypic]
      Count: [†g] †1f;2g [26 Dec 2020]
         Family †Gigantoscorpionidae Kjellesvig-Waering, 1986
        Count: [†g] †2g [26 Dec 2020]
           Genus †Gigantoscorpio Størmer, 1963
          Count: -