Synsphyronus dewae 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 in South Australia in woodland habitats. The type locality is Truro, 80 km north-east of Adelaide.[1]
The pseudoscorpions are terrestrial predators.[1]