Chelicerata Heymons, 1901
Pseudoscorpiones De Geer, 1778
Homosyphronida Dunlop, Penney & Jekel, 2020, orth. inval.
see Group Homosphyronida Chamberlin, 1929
Iochierata Dunlop, Penney & Jekel, 2010, orth. inval.
see Suborder Iocheirata Harvey, 1992
Hemictenata Balzan, 1892
Superfamily Neobisioidea Chamberlin, 1930
Family Syarinidae Chamberlin, 1930