Synsphyronus hanseniiSynsphyronus hansenii is a species of pseudoscorpion in the Garypidae family. It was described in 1908 by Danish arachnologist Carl Johannes With. The specific epithet references Danish zoologist Hans Jacob Hansen.Distribution and habitatThe species occurs in south-western and south-eastern Australia in woodland habitats, often under bark. The type locality is Tasmania.BehaviourThe pseudoscorpions are terrestrial predators.