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 †Mesophonoidea Wills, 1910
      Count: [†g] †6f;10g [27 Dec 2020]
         Family †Centromachidae Petrunkevitch, 1953
        Count: [†g] †5g [27 Dec 2020]
           Genus †Phoxiscorpio Kjellesvig-Waering, 1986
          Count: -