Pseudotyrannochthonius solitarius is a species of pseudoscorpion in the Pseudotyrannochthoniidae family.

It was described in 1951 by American arachnologist Clarence Clayton Hoff.

[1][2] The species occurs in the Australian Capital Territory, New South Wales, Tasmania, Victoria and Western Australia.

The type locality is Mount Slide in Kinglake National Park north of Melbourne.

[1][2] The pseudoscorpions are terrestrial predators.