Tyrannochthonius souchomalusTyrannochthonius souchomalus is a species of pseudoscorpion in the Chthoniidae family. It is endemic to Australia. It was described in 2008 by Australian arachnologists Karen Edward and Mark Harvey.Distribution and habitatThe species occurs in the Murchison bioregion of Mid West Western Australia. The type locality is a borehole on Austin Downs Station.BehaviourThe arachnids are cave-dwelling, terrestrial predators.