Tyrannochthonius cavicola is a species of pseudoscorpion in the Chthoniidae family.

It was described in 1967 by Austrian arachnologist Max Beier.

[1][2] The species occurs in eastern New South Wales.

The type locality is The Grill Cave, Bungonia, some 125 km south-west of Sydney.

[1][2] The arachnids are cave-dwelling, terrestrial predators.