Synsphyronus nullarborensis is a species of pseudoscorpion in the Garypidae family. It is endemic to Australia. It was described in 1969 by Austrian arachnologist Max Beier.[1]
The species occurs on the Nullarbor Plain of South Australia and Western Australia. The type locality is Toolinna Rockhole.[1]
The pseudoscorpions are terrestrial predators.[1]