Withius pigerWithius piger is a species of pseudoscorpion in the Withiidae family. It was described in 1878 by French arachnologist Eugène Simon.Distribution and habitatThe species has a cosmopolitan distribution, often in human-dominated environments, and has been widely introduced. The type locality is Bou Saâda, Algeria.BehaviourThe pseudoscorpions are synanthropic, terrestrial predators.