Synsphyronus paradoxus is a species of pseudoscorpion in the Garypidae family.

It was described in 1930 by American arachnologist Joseph Conrad Chamberlin.

[1][2] The species occurs in central and south-eastern Australia in the Lake Eyre and Murray–Darling basins in woodland habitats, often under bark.

The type locality is Menindee.

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