Caenagnathus

† Caenagnathus was a large oviraptorosaurian theropod from the Late Cretaceous of Canada, among the largest caenagnathids known. Known primarily from lower jaw material found in the Horseshoe Canyon Formation of Alberta, it possessed a toothless beak suited to an omnivorous diet. Historical confusion surrounded its classification — it was initially thought to be a bird — before being recognized as a theropod dinosaur closely related to North American giant oviraptorosaurs.