Chelicerata Heymons, 1901
Count: 2c;12o; †6o;2f;23g
   Uropygi Thorell, 1882 [monotypic] - whip scorpions
  Count: [g†g] 1f; †7g [23 Dec 2020]
     Family Thelyphonidae Lucas, 1835
    Count: [†g] †3g [23 Dec 2020]
       Genus †Mesoproctus Dunlop, 1998
      Count: -