Rhynchosauria

Rhynchosaurs Temporal range: Early-Late Triassic, Induan-early Norian I O An. La. Carn. Norian Rh.
Mounted skeleton model of Hyperodapedon sanjuanensis, from Late Triassic (Carnian) South America
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauromorpha
Clade:	Crocopoda
Order:	†Rhynchosauria Osborn 1903
Subgroups
†Colobops? †Eohyosaurus †Howesia †Mesosuchus †Noteosuchus †Rhynchosauridae †Eifelosaurus †Rhynchosaurus †Stenaulorhynchinae †Ammorhynchus †Brasinorhynchus †Elorhynchus †Mesodapedon †Stenaulorhynchus †Hyperodapedontidae †Bentonyx †Fodonyx †Langeronyx †Hyperodapedontinae
Synonyms
Gnathodontia Owen, 1859

Rhynchosaurs are a group of extinct herbivorous Triassic archosauromorph reptiles, belonging to the order Rhynchosauria. Rhynchosaurs are distinguished by their triangular skulls and elongated, beak like premaxillary bones. Rhynchosaurs first appeared in the Early Triassic, reaching their broadest abundance and a global distribution during the Carnian stage of the Late Triassic, before dying out early in the succeeding Norian stage.