Article: The postcranial skeleton of the Upper Triassic sphenodontid Planocephalosaurus robinsonae

The postcranial skeleton of the Triassic sphenodontid, Planocephalosaurus robinsonae, is described from dissociated remains recovered from the type locality at Cromhall Quarry, South Gloucestershire. A full reconstruction is outlined and its relationships within the Sphenodontidae are briefly discussed. A lower Jurassic eosuchian, Gephyrosaurus bridensis, is shown to share a number of characteristics with P. robinsonae, and Gephyrosaurus is consequently considered to be either a member of the Sphenodontidae or an offshoot from the stem Sphenodontidae.