Sathrochthonius maoricus is a species of pseudoscorpion in the Chthoniidae family. It is endemic to New Zealand. It was described in 1976 by Austrian arachnologist Max Beier.
The body length of males is 1.7-1.8 mm; that of females is 1.8-2.2 mm. The colour is dark brown.
The species occurs in New Zealand. The type locality is Pelorus Bridge in Marlborough, where the habitat is dense mixed forest.
The arachnids are terrestrial predators.