Kingdom Animalia Linnaeus, 1758 - animals Phylum Arthropoda Siebold, 1848 - arthropods Subphylum Chelicerata Heymons, 1901 Class Arachnida Lamarck, 1801 Order Pseudoscorpiones De Geer, 1778 Suborder Iocheirata Harvey, 1992 Superfamily Cheliferoidea Risso, 1826 Family Atemnidae Kishida, 1929