Pseudotyrannochthonius gigas is a species of pseudoscorpion in the Pseudotyrannochthoniidae family. It is endemic to Australia. It was described in 1969 by Austrian arachnologist Max Beier.[1]
The species occurs in the Western District of Victoria. The type locality is Harman One Cave, Byaduk.[1]
The pseudoscorpions are cave-dwelling terrestrial predators.[1]