Tyrannochthonius billhumphreysi

Tyrannochthonius billhumphreysi 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 habitat
The species occurs in the Murchison bioregion of Western Australia. The type locality is a borehole on Sturt Meadows Station, some 40 km north-west of Leonora.

Behaviour
The arachnids are cave-dwelling, terrestrial predators.