Named By: Susan E. Evans - 1980.
Classification: Chordata, Reptilia, Rhynchocephalia, Gephyrosauridae.
Species: G. bridensis (type).
Size: Roughly up to 20 centimetres long.
Known locations: Wales.
Time period: Hettangian to Pliensbachian of the Jurassic.
Fossil representation: Several individuals.
Gephyrosaurus is a genus of rhynchocephalian reptile, a kind similar to the tuatara from New Zealand. Gephyrosaurus was a small creature with numerous small pointed teeth in the mouth that were quite tightly packed together. These teeth might have been used for seizing small insects which are the main prey for the tuatara that we know today.
- The skull of a new eosuchian reptile from the Lower Jurassic of South Wales - Zoological Journal of the Linnean Society 70:203-264 - Susan E. Evans - 1980.
- The postcranial skeleton of the Lower Jurassic eosuchian Gephyrosaurus bridensis. Zoological Journal of the Linnean Society 73:81–116 - Susan E. Evans - 1981.
- Caudal autonomy in a lower Jurassic Eosuchian. Copeia 1981: 883-884. - Susan E. Evans - 1981.
-Madibular fracture and inferred behaviour of a fossil reptile. Copeia 1983: 845-847. - Susan E. Evans - 1983.
- Tooth replacement in the Lower Jurassic lepidosaur Gephyrosaurus bridensis. Neues Jahrbuch fuir Geologie und Paliontologie, Monatshefte 7:411-420 - Susan E. Evans - 1985.