Pseudoscorpiones: Systematics & Taxonomy

There are nearly 3,600 named species in 460 genera divided among 26 families. Pseudoscorpions are divided into two suborders: Epiocheirata and Iocheirata. The Epiocheirata comprises the rare Feaelloidea (two families) and the widespread Chthonioidea (four families). Recent molecular work suggests that Epiocheirata may not be monophyletic. Iocheirata, which is defined by the presence of venom glands in one or both chelal fingers, comprises five superfamilies, Neobisiidae (seven families), Garypoidea (six families), Cheiridioidea (two families), Sternophoroidea (one family) and Cheliferoidea (four families).