Saurischia Theropoda Tetanurae Coelurosauria Oviraptorosauria [Carnivore]

Barsbold, 1975a, Diagnosis: Small and moderately large theropods with toothless jaws which formed a massive beak. Dental bone has two processes, separated by large lateral openings. The articular joint of the lower jaw has a massive longitudinal projection. Composition: Family Oviraptoridae Barsbold, 1976; and Caenagnathidae Sternberg, 1940. Comparison: Oviraptorosaurs are the second group of toothless theropods, basically differentiated from ornithomimosaurs by the development of a massive beak and the highly specific in configuration and structure of the lower jaw with the characteristic articular joint. Distribution: Late Cretaceous, Central Asia.

A group of toothless carnivorous dinosaurs from the Late Cretaceous period, mostly small sized with lightly built skeletons that display most common theropod characters.

Cretaceous Early

China

Incisivosaurus gautheri - Yixian Formation, Liaoning

Cretaceous Late

Canada

Caenagnathus

Caenagnathus collinsi - Judith River Group (Wedge), Alberta

Caenagnathus sternbergi - Judith River Group (Wedge), Alberta

Chirostenotes

Chirostenotes elegans - Oldman Formation, Judith River Group (Wedge), Alberta

Elmisaurus elegans - Judith River Group (Wedge), Alberta

Ornithomimus elegans - Oldman Formation, Judith River Group (Wedge), Alberta

Chirostenotes pergracilis - Judith River Group (Wedge), Horseshoe Canyon Formation, Alberta

Macrophalangia canadensis - Judith River Group (Wedge), Alberta

Epichirostenotes curriei - Horseshoe Canyon Formation, Alberta

US

Caenagnathus

Caenagnathus sternbergi - Two Medicine Formation, Montana

Hagryphus giganteus - Kaiparowits Formation, Utah

Ojoraptorsaurus boerei - Ojo Alamo Sandstone, New Mexico

China

Avimimus portentosus - Iren Dabasu Formation

Banji long - Nanxiong Formation

Gigantoraptor erlianensis - Iren Dabasu Formation

Luoyanggia liudianensis - Mangchuan Formation

Machairasaurus leptonychus - Wulansuhai Formation

Shixinggia oblita - Pingling Formation

Kazakhstan

Caenagnathasia martinsoni - Bostobinskaya Svita

Mongolia

Avimimus portentosus - Barun Goyot Formation

Citipati

Citipati osmolskae - Djadochta Formation, Ukhaa Tolgod

Citipati sp. - Djadochta Formation, Ukhaa Tolgod

Conchoraptor gracilis - Barun Goyot Formation, Red Beds of Khermeen Tsav

Elmisaurus rarus - Nemegt Formation

Heyuannia huangi - Dalangshan Formation

Ingenia yanshini (1) - Barun Goyot Formation, Red Beds of Khermeen Tsav, [Hermiin Tsav], Nemegt Formation

Ingenia yanshini (2) - Red Beds of Khermeen Tsav

Khaan mckennai - Djadochta Formation

Nemegtomaia barsboldi - Nemegt Formation

Nemegtia barsboldi

Nomingia gobiensis - Bugin Tsav
Oviraptor philoceratops - Djadochta Formation

Rinchenia mongoliensis - Nemegt Formation

Oviraptor mongoliensis - Nemegt Formation

Uzbekistan

Caenagnathasia martinsoni - Bissekt Formation