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

It was described in 1976 by Austrian arachnologist Max Beier.

[1] The species occurs in New Zealand as well as on Norfolk Island, an Australian territory in the south-west Pacific Ocean, where it inhabits plant litter.

The type locality is Mount Pitt on Norfolk Island.

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