Order Pseudoscorpiones De Geer, 1778
Count: [f†f] 25f; †1f [8 Jan 2021]
   1 Suborder †Palaeosphyronida Harvey, 2019 [monotypic]
  Count: [†f] †1f [8 Jan 2021]
   2.1 Suborder Heterosphyronida Chamberlin, 1929 [monotypic]
  Count: [f] 2f [8 Jan 2021]
   2.2 Homosphyronida Chamberlin, 1929
  Count: [f] 23f [8 Jan 2021]