Synsphyronus viridis is a species of pseudoscorpion in the Garypidae family. It is endemic to Australia. It was described in 1937 by Australian zoologist Alan Tubb.
The species occurs in Victoria. The type (and only known) locality is Lady Julia Percy Island in Bass Strait, where it was found beneath stones near Seal Bay.
The pseudoscorpions are terrestrial predators.