Chelicerata Heymons, 1901
Count: 2c;12o; †6o;2f;23g
   †Trigonotarbida Petrunkevitch, 1949
  Count: [†g] †9f;37g [24 Dec 2020]
     Family †Palaeocharinidae Hirst, 1923
    Count: [†g] †6g [23 Dec 2020]
       Genus †Gelasinotarbus Shear, Selden & Rolfe, 1987
      Count: -