Reptilia - Pseudosuchia - Ornithosuchidae

Alternative combinations: Palaeosaurus platyodon, Rileya platyodon, Thecodontosaurus platyodon

Full reference: H. Riley and S. Stutchbury. 1836. A description of various fossil remains of three distinct saurian animals discovered in the autumn of 1834, in the Magnesian Conglomerate on Durdham Down, near Bristol. Proceedings of the Geological Society of London 2:397-399

Belongs to Palaeosauriscus according to R. Steel 1970

Sister taxa: Palaeosauriscus stricklandi, Palaeosauriscus subcylindrodon, Palaeosaurus priscus

Type specimen: BRSMG *Ca7448/3, a tooth. Its type locality is Durdham Down, Quarry Steps, which is in a Triassic fissure fill limestone/breccia in the Magnesian Conglomerate Formation of the United Kingdom.