Infraordre
Valide Éteint

Neoceratopsia

Sereno 1986

Les Neoceratopsia sont un clade regroupant les cératopsiens les plus avancés.

Plage temporelle
Trias
Jurassique
Crétacé
Paléogène
Néogène
252 201 145 66 0 Ma
Occurrences PBDB
150
Groupe
Dinosaures
Herbivore Vivant au sol Terrestre
Neoceratopsia
cliquer pour agrandir
A Prenoceratops from Pondera Co., Montana now in the permanent collection of The Children’s Museum of Indianapolis. CC BY-SA 3.0 · Wikimedia

Légende en anglais — traduction française non disponible.

PBDB Wikipedia
Classification
Dinosauria Clade non classé
Ornithischia Clade non classé
Neornithischia Clade non classé
Pyrodontia Clade non classé
Cerapoda Clade non classé
Marginocephalia Clade non classé
Ceratopsia Sous-ordre
Neoceratopsia Infraordre
Sites de découverte 150 sites géolocalisés
Répartition
Principaux pays
🇲🇳 Mongolie
71
🇨🇳 Chine
24
🇺🇸 États-Unis
23
🇺🇿 Ouzbékistan
15
🇨🇦 Canada
10
🇯🇵 Japon
2
🇸🇪 Suède
2
🇰🇷 Corée du Sud
1
🇹🇯 Tadjikistan
1
🇷🇺 Russie
1
Formations géologiques
Bayan Mandahu
8
Nemegt
5
Zhonggou
4
Moreno Hill
3
Scollard
3
Distribution temporelle
Maastrichtien (72.2–66 Ma)
18
Campanien (83.6–72.2 Ma)
89
Santonien (85.7–83.6 Ma)
2
Turonien (93.9–89.8 Ma)
11
Cénomanien (100.5–93.9 Ma)
13
Albien (113.2–100.5 Ma)
11
Aptien (121.4–113.2 Ma)
2
Barrémien (125.77–121.4 Ma)
3
Hauterivien (132.6–125.77 Ma)
1
Bibliographie
Description originale
P. C. Sereno. 1986. Phylogeny of the bird-hipped dinosaurs (order Ornithischia). National Geographic Research 2(2):234-256
Bibliographie (93)
M. T. Carrano. 2025. First report of ceratopsians and tyrannosauroids (Dinosauria) in the Newark Canyon Formation (Lower Cretaceous) of Nevada. Journal of Paleontology DOI ↗
T. Tanaka, K. Chiba, and T. Ikeda, M. J. Ryan. 2024. A new neoceratopsian (Ornithischia, Ceratopsia) from the Lower Cretaceous Ohyamashimo Formation (Albian), southwestern Japan. Papers in Palaeontology (e1587):1-30 DOI ↗
K. Chiba, M. J. Ryan, and M. Saneyoshi, S. Konishi, Y. Yamamoto, D. C. Evans, T. Chinzorig, P. Khatanbaatar, Z. Badamkhatan, B. Mainbayar, K. Tsogtbaatar. 2023. New insights on the frill ornamentations of protoceratopsids. Windows into Sauropsid and Synapsid Evolution: Essays in Honor of Louis L. Jacobs
Y. Lee, L. L. Jacobs, and P. J. Currie, R. Barsbold. 2023. Narrative of the Korea-Mongolian International Dinosaur expeditions (KID) 2006–2010 with scientific results. Windows into Sauropsid and Synapsid Evolution: Essays in Honor of Louis L. Jacobs
M. J. Ryan, L. Micucci, and H. Rizo, C. Sullivan, Y.-N. Lee, D. C. Evans. 2023. A new Late Cretaceous leptoceratopsid (Dinosauria: Ceratopsia) from the Oldman Formation (Campanian) of Alberta, Canada. Windows into Sauropsid and Synapsid Evolution: Essays in Honor of Prof. Louis L. Jacobs
X. Chen, K. Tan, and L. Lu, S. Ji. 2022. Occurrence of Protoceratops hellenikorhinus (Ceratopsia: Protoceratopsidae) in Alxa region, western Inner Mongolia, China. Acta Geologica Sinica 96(11):3722-3732 DOI ↗
M. Son, Y.-N. Lee, and B. Zorigt, Y. Kbayashi, J.-Y. Park, S. Lee, S.-H. Kim, K. Y. Lee. 2022. A new juvenile Yamaceratops (Dinosauria, Ceratopsia) from the Javkhlant Formation (Upper Cretaceous) of Mongolia . PeerJ 10:e13176:1-44 DOI ↗
W. W. Stein. 2021. The paleontology, geology and taphonomy of the Tooth Draw Deposit; Hell Creek Formation (Maastrictian), Butte County, South Dakota. The Journal of Paleontological Sciences JPS.C.21:0001:1-108
Ł. Czepiński. 2020. New protoceratopsid specimens improve the age correlation of the Upper Cretaceous Gobi Desert strata. Acta Palaeontologica Polonica 65(3):481-497 DOI ↗
C. Yu, A. Prieto-Marquez, and T. Chinzorig, Z. Badamkhatan, M. Norell. 2020. A neoceratopsian dinosaur from the Early Cretaceous of Mongolia and the early evolution of Ceratopsia. Communications Biology 3:499:1-8 DOI ↗
V. M. Arbour and D. C. Evans. 2019. A new leptoceratopsid dinosaur from Maastrichtian-aged deposits of the Sustut Basin, northern British Columbia, Canada. PeerJ 7:e7926 DOI ↗
Ł. Czepiński. 2019. Ontogeny and variation of a protoceratopsid dinosaur Bagaceratops rozhdestvenskyi from the Late Cretaceous of the Gobi Desert. Historical Biology 32(10):1394-1421 DOI ↗
B. Kim, H. Yun, and Y.-N. Lee. 2019. [The postcranial skeleton of Bagaceratops (Ornithischia: Neoceratopsia) from the Baruungoyot Formation (Upper Cretaceous) in Hermiin Tsav of southwestern Gobi, Mongolia]. Journal of the Geological Society of Korea 55(2):179-190 DOI ↗
H. You, E. M. Morschhauser, and D. Li, P. Dodson. 2019. Introducing the Mazongshan Dinosaur Fauna. Auroraceratops rugosus (Ornithischia, Ceratopsia) from the Early Cretaceous of northwestern Gansu Province, China. Society of Vertebrate Paleontology Memoir 18. Journal of Vertebrate Paleontology 38(supplement):1-11 DOI ↗
N. R. Longrich. 2016. A ceratopsian dinosaur from the Late Cretaceous of eastern North America, and implications for dinosaur biogeography. Cretaceous Research 57:199-207 DOI ↗
Y. He, P. J. Makovicky, and K. Wang, S. Chen, C. Sullivan, F. Han, X. Xu. 2015. A new leptoceratopsid (Ornithischia, Ceratopsia) with a unique ischium from the Upper Cretaceous of Shandong Province, China. PLoS ONE 10(12): e0144148 DOI ↗
W. Zheng, X. Jin, and X. Xu. 2015. A psittacosaurid-like basal neoceratopsian from the Upper Cretaceous of central China and its implications for basal ceratopsian evolution. Scientific Reports 5:14190:1-9 DOI ↗
A. A. Farke, W. D. Maxwell, and R. L. Cifelli, M. J. Wedel. 2014. A ceratopsian dinosaur from the Lower Cretaceous of western North America, and the biogeography of Neoceratopsia. PLoS ONE 9(12):e11205:1-18 DOI ↗
K. Tanoue and Y. Okazaki. 2014. The first basal neoceratopsian dinosaur from the Lower Cretaceous Kanmon Group in Kyushu, southwestern Japan. Paleontological Research 18(2):77-81 DOI ↗
V. S. Tereshchenko and T. Singer. 2013. Structural features of neural spines of the caudal vertebrae of protoceratopoids (Ornithischia: Neoceratopsia). Paleontological Journal 47(6):618-630 DOI ↗
N. Handa, M. Watabe, and K. Tsogtbaatar. 2012. New specimens of Protoceratops (Dinosauria: Neoceratopsia) from the Upper Cretaceous in Udyn Sayr, southern Gobi area, Mongolia. Paleontological Research 16(3):179-198 DOI ↗
M. J. Ryan, D. C. Evans, and P. J. Currie, C. M. Brown, D. Brinkman. 2012. New leptoceratopsids from the Upper Cretaceous of Alberta, Canada. Cretaceous Research 35(1):69-80 DOI ↗
D. E. Fastovsky, D. B. Weishampel, and M. Watabe, R. Barsbold, K. Tsogtbaatar, P. Narmandakh. 2011. A nest of Protoceratops andrewsi (Dinosauria, Ornithischia). Journal of Paleontology 85(6):1035-1041 DOI ↗
R. Amiot, N. Kusuhashi, and X. Xu, Y. Wang. 2010. Isolated dinosaur teeth from the Lower Cretaceous Shahai and Fuxin formations of northeastern China. Journal of Asian Earth Sciences 39:347-358 DOI ↗
Y.-N. Lee, M. J. Ryan, and Y. Kobayashi. 2010. The first ceratopsian dinosaur from South Korea. Naturwissenschaften DOI ↗
P. J. Makovicky. 2010. A redescription of the Montanoceratops cerorhynchus holotype with a review of referred material. New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Indiana University Press, Bloomington
T. Miyashita, P. J. Currie, and B. J. Chinnery-Allgeier. 2010. First basal neoceratopsian from the Oldman Formation (Belly River Group), southern Alberta. New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Indiana University Press, Bloomington
M. Saneyoshi, M. Watabe, and T. Tsubamoto, K. Tsogtbaatar, T. Chinzorig, S. Suzuki. 2010. Report of the HMNS-MPC Joint Paleontological Expedition in 2007. Hayashibara Museum of Natural Sciences Research Bulletin 3:19-28
M. Watabe, K. Tsogtbaatar, and S. Suzuki, M. Saneyoshi. 2010. Geology of dinosaur-fossil-bearing localities (Jurassic and Cretaceous: Mesozoic) in the Gobi Desert: Results of the HMNS-MPC Joint Paleontological Expedition. Hayashibara Museum of Natural Sciences Research Bulletin 3:41-118
X. Xu, K. Wang, and X. Zhao, C. Sullivan, S. Chen. 2010. A new leptoceratopsid (Ornithischia: Ceratopsia) from the Upper Cretaceous of Shandong, China and its implications for neoceratopsian evolution. PLoS One 5(11/e13835):1-14 DOI ↗
H.-L. You, K. Tanoue, and P. Dodson. 2010. A new species of Archaeoceratops (Dinosauria: Neoceratopsia) from the Early Cretaceous of the Mazongshan area, northwestern China. New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Indiana University Press, Bloomington
P. Godefroit, L. Golovneva, and S. Shchepetov, G. Garcia, P. Alekseev. 2009. The last polar dinosaurs: high diversity of latest Cretaceous arctic dinosaurs in Russia. Naturwissenschaften 96(4):495-501 DOI ↗
L. Jin, J. Chen, and S. Zan, P. Godefroit. 2009. A new basal neoceratopsian dinosaur from the middle Cretaceous of Jilin Province, China. Acta Geologica Sinica 83(2):200-206 DOI ↗
V. R. Alifanov. 2008. The tiny horned dinosaur Gobiceratops minutus gen. et sp. nov. (Bagaceratopidae, Neoceratopsia) from the Upper Cretaceous of Mongolia. Paleontological Journal 42(6):621-633 DOI ↗
B. J. Chinnery and J. R. Horner. 2007. A new neoceratopsian dinosaur linking North American and Asian taxa. Journal of Vertebrate Paleontology 27(3):625-641 DOI ↗
J. Lindgren, P. J. Currie, and M. Siverson, J. Rees, P. Cederström, F. Lindgren. 2007. The first neoceratopsian dinosaur remains from Europe. Palaeontology 50(4):929-937 DOI ↗
M. A. Norell, K.-Q. Gao, and J. Conrad. 2007. A New Platynotan Lizard (Diapsida: Squamata) from the Late Cretaceous Gobi Desert (Ömnögov), Mongolia. American Museum Novitates (3605):1-22 DOI ↗
C. J. Ott. 2007. Cranial anatomy and biogeography of the first Leptoceratops gracilis (Dinosauria: Ornithischia) specimens from the Hell Creek Formation, southeast Montana. Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs
V. A. Tereshchenko. 2007. Key to protoceratopoid vertebrae (Ceratopsia, Dinosauria) from Mongolia. Paleontological Journal 41(2):175-188 DOI ↗
V. R. Alifanov and A. O. Averianov. 2006. On the finding of ornithomimid dinosaurs (Saurischia, Ornithomimosauria) in the Upper Cretaceous beds of Tajikistan. Paleontological Journal 40(1):103-108 DOI ↗
P. J. Makovicky and M. A. Norell. 2006. Yamaceratops dorngobiensis, a new primitive ceratopsian (Dinosauria: Ornithischia) from the Cretaceous of Mongolia. American Museum Novitates 3530:1-42 DOI ↗
H. You, D. Li, and Q. Ji, M. C. Lamanna, P. Dodson. 2005. On a new genus of basal neoceratopsian dinosaur from the Early Cretaceous of Gansu Province, China. Acta Geologica Sinica 79(5):593-597
B. J. Chinnery. 2004. Description of Prenoceratops pieganensis gen. et sp. nov. (Dinosauria: Neoceratopsia) from the Two Medicine Formation of Montana. Journal of Vertebrate Paleontology 24(3):572-590 DOI ↗
M. Watabe and K. Tsogtbaatar. 2004. Report on the Japan–Mongolia Joint Paleontological Expedition to the Gobi desert, 2000. Hayashibara Museum of Natural Sciences Research Bulletin 2:45-67
V. R. Alifanov. 2003. Two new dinosaurs of the infraorder Neoceratopsia (Ornithischia) from the Upper Cretaceous of the Nemegt Depression, Mongolian People's Republic. Paleontological Journal 37(5):524-534
V. S. Tereshchenko and V. R. Alifanov. 2003. Bainoceratops efremovi, a new protoceratopid dinosaur (Protoceratopidae, Neoceratopsia) from the Bain-Dzak locality (south Mongolia). Paleontological Journal 37(3):293-302
H. You and Z. Dong. 2003. A new protoceratopsid (Dinosauria: Neoceratopsia) from the Late Cretaceous of Inner Mongolia, China. Acta Geologica Sinica 77(3):299-303
Z. Li, J. Fang, and X. Li, S. Ma, J. Chen. 2002. Mesozoic strata of Chaoshui Basin, northwest China. Palaeoworld 14:49-75
D. B. Weishampel, M. B. Meers, and W. A. Akersten, A. D. McCrady. 2002. New Early Cretaceous dinosaur remains, including possible ceratopsians, from the Wayan Formation of Eastern Idaho. in W. A. Akersten, M. E. Thompson, D. J. Meldrum, R. A. Rapp, and H. G. McDonald (eds) And Whereas: Papers on the Vertebrate Paleontology of Idaho Honoring John A White, Idaho Museum of Natural History Occasional Paper 37 2:5-17
X. Xu, P. J. Makovicky, and X.-l. Wang, M. A. Norell, H.-l. You. 2002. A ceratopsian dinosaur from China and the early evolution of the Ceratopsia. Nature 416:314-317 DOI ↗
O. Lambert, P. Godefroit, and H. Li, C.-Y. Shang, Z.-M. Dong. 2001. A new species of Protoceratops (Dinosauria, Neoceratopsia) from the Late Cretaceous of Inner Mongolia (P. R. China). Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Science de la Terre 71(supplement):5-28
P. J. Makovicky. 2001. A Montanoceratops cerorhynchus (Dinosauria: Ceratopsia) braincase from the Horseshoe Canyon Formation of Alberta. Mesozoic Vertebrate Life, D. H. Tanke and K. Carpenter (eds.), Indiana University Press, Bloomington
K. Gao and M. A. Norell. 2000. Taxonomic composition and systematics of Late Cretaceous lizard assemblages from Ukhaa Tolgod and adjacent localities, Mongolian Gobi Desert. Bulletin of the American Museum of Natural History 249:1-118
Y. Matsumoto, R. Hashimoto, and T. Sonoda. 2000. Report of preparation works for Mongolian specimens in HMNS from March 1994 to December 1998. Hayashibara Museum of Natural Sciences Research Bulletin 1:113-127
P. C. Sereno. 2000. The fossil record, systematics and evolution of pachycephalosaurs and ceratopsians from Asia. The Age of Dinosaurs in Russia and Mongolia
S. Suzuki and M. Watabe. 2000. Report on the preliminary joint field excursion to the Gobi desert, 1992. Hayashibara Museum of Natural Sciences Research Bulletin 1:13-16
M. Watabe and S. Suzuki. 2000. Report on the Japan–Mongolia Joint Paleontological Expedition to the Gobi desert, 1997. Hayashibara Museum of Natural Sciences Research Bulletin 1:69-82
W. Watabe and S. Suzuki. 2000. Report on the Japan–Mongolia Joint Paleontological Expedition to the Gobi desert, 1994. Hayashibara Museum of Natural Sciences Research Bulletin 1:30-44
M. Watabe and S. Suzuki. 2000. Cretaceous fossil localities and a list of fossils collected by the Hayashibara Museum of Natural Sciences and Mongolian Paleontological Center Joint Paleontological Expedition (JMJPE) from 1993 through 1998. Hayashibara Museum of Natural Sciences Research Bulletin 1:99-108
M. Watabe and S. Suzuki. 2000. Report on the Japan–Mongolia Joint Paleontological Expedition to the Gobi desert, 1996. Hayashibara Museum of Natural Sciences Research Bulletin 1:58-68
M. Watabe and S. Suzuki. 2000. Report on the Japan–Mongolia Joint Paleontological Expedition to the Gobi desert, 1993. Hayashibara Museum of Natural Sciences Research Bulletin 1:17-29
J. G. Eaton. 1999. Vertebrate paleontology of the Iron Springs Formation, Upper Cretaceous, southwestern Utah. Vertebrate Paleontology in Utah, Utah Geological Survey Miscellaneous Publication 99-1:339-343
B. J. Chinnery, T. R. Lipka, and J. I. Kirkland, J. M. Parrish, M. K. Brett-Surman. 1998. Neoceratopsian teeth from the Lower to Middle Cretaceous of North America. Lower and Middle Cretaceous Terrestrial Ecosystems, New Mexico Museum of Natural History and Science Bulletin 14:297-302
B. J. Chinnery and D. B. Weishampel. 1998. Montanoceratops cerorhynchus (Dinosauria: Ceratopsia) and relationships among basal neoceratopsians. Journal of Vertebrate Paleontology 18(3):569-585 DOI ↗
D. G. Wolfe and J. I. Kirkland. 1998. Zuniceratops christopheri n. gen. & n. sp., a ceratopsian dinosaur from the Moreno Hill Formation (Cretaceous, Turonian) of west-central New Mexico. S. G. Lucas, J. I. Kirkland, and J. W. Estep (eds.), Lower and Middle Cretaceous Terrestrial Ecosystems, New Mexico Museum of Natural History and Science Bulletin 14:307-317
Z. Dong and Y. Azuma. 1997. On a primitive neoceratopsian from the Early Cretaceous of China. Sino-Japanese Silk Road Dinosaur Expedition. China Ocean Press, Beijing
Z. Dong. 1997. On the crocodiles from the Mazongshan area, Gansu Province, China. Sino-Japanese Silk Road Dinosaur Expedition. China Ocean Press, Beijing
E. N. Kurochkin. 1996. A new enantiornithid of the Mongolian Late Cretaceous, and a general appraisal of the infraclass Enantiornithes (Aves). Russian Academy of Sciences Palaeontological Institute Special Issue
V. S. Tereshchenko. 1996. A reconstruction of the locomotion of Protoceratops. Paleontological Journal 30(2):232-245
D. Dashzeveg, M. J. Novacek, and MA Norell, JM Clark, LM Chiappe, A. Davidson, MC McKenna, L. Dingus, C. Swisher, P. Altangerel. 1995. Extraordinary preservation in a new vertebrate assemblage from the Late Cretaceous of Mongolia. Nature 374:446-449 DOI ↗
L. A. Nessov. 1995. Dinozavri severnoi Yevrazii: Novye dannye o sostave kompleksov, ekologii i paleobiogeografii [Dinosaurs of northern Eurasia: new data about assemblages, ecology, and paleobiogeography]. Institute for Scientific Research on the Earth's Crust, St. Petersburg State University, St. Petersburg
Z.-M. Dong and P. J. Currie. 1994. Protoceratopsian embryos from Inner Mongolia, People's Republic of China. Canadian Journal of Earth Sciences 30(10-11):2248-2254 DOI ↗
M. Watabe and D. B. Weishampel. 1994. Results of Hayashibara Museum of Natural Sciences–Institute of Geology, Academy of Sciences of Mongolia Joint Paleontological Expedition to the Gobi Desert in 1993. Journal of Vertebrate Paleontology 14(3, suppl.):51A
S. M. Kurzanov. 1992. A gigantic protoceratopsid from the Upper Cretaceous of Mongolia. Paleontological Journal 26(3):103-116
K. E. Mikhailov. 1991. Classification of fossil eggshells of amniotic vertebrates. Acta Palaeontologica Polonica 36(2):193-238
K. Sabath. 1991. Upper Cretaceous amniotic eggs from the Gobi Desert. Acta Palaeontologica Polonica 36(2):151-192
L. S. Russell. 1987. Biostratigraphy and paleontology of the Scollard Formation, Late Cretaceous and Paleocene of Alberta. Royal Ontario Museum Life Sciences Contribution 147:1-23 DOI ↗
J. H. Ostrom. 1978. <i>Leptoceratops gracilis</i> from the "Lance" Formation of Wyoming. Journal of Paleontology 52(3):697-704
R. Gradzinski, Z. Kielan-Jaworowska, and T. Maryanska. 1977. Upper Cretaceous Djadokhta, Barun Goyot and Nemegt formations of Mongolia, including remarks on previous subdivisions. Acta Geologica Polonica 27(3):281-318
T. Maryanska and H. Osmólska. 1975. Protoceratopsidae (Dinosauria) of Asia. Palaeontologica Polonica 33:133-181
R. Barsbold. 1974. Poyedinok dinozavrov [Dueling dinosaurs]. Prioda 1974(2):81-83
R. Gradzinski and T. Jerzykiewicz. 1972. Additional geographical and geological data from the Polish-Mongolian Palaeontological Expeditions. Palaeontologia Polonica 27:17-306
Z. Kielan-Jaworowska and R. Barsbold. 1972. Narrative of the Polish-Mongolian Palaeontological Expeditions 1967-1971. Palaeontologia Polonica 27:5-136
S. M. Kurzanov. 1972. Sexual dimorphism in protoceratopsians. Paleontological Journal 1972(1):91-97
M. C. McKenna and J. D. Love. 1970. Local stratigraphic and tectonic significance of Leptoceratops, a Cretaceous dinosaur in the Pinyon Conglomerate, northwestern Wyoming. United States Geological Survey Professional Paper 700(D):D55-D61
Z. Kielan-Jaworowska. 1966. Third (1965) Polish-Mongolian Palaeontological Expedition to the Gobi Desert and western Mongolia. Bulletin de l'Académie Polonaise des Sciences, Cl. II 14(4):249-252
I. Nikoloff and F. v. Huene. 1966. Neue Vertebratenfunde in der Wüste Gobi. Neues Jahrbuch für Geologie und Paläontologie Monatshefte 11:691-694
Z. Kielan-Jaworowska and K. Kowalski. 1965. Polish-Mongolian Palaeontological Expeditions to the Gobi Desert in 1963 and 1964. Bulletin de l'Académie Polonaise des Sciences, Cl. II 13(3):175-179
C. M. Sternberg. 1950. Leptoceratops, the most primitive horned dinosaur, from the Upper Edmonton of Alberta. Transactions of the Royal Society of Canada, series 3 44:229
B. Brown and E. M. Schlaikjer. 1942. The skeleton of Leptoceratops with the description of a new species. American Museum Novitates 1169:1-15
R. C. Andrews. 1932. The New Conquest of Central Asia: A Narrative of the Explorations of the Central Asiatic Expeditions ni Mongolia and China, 1921-1930. Natural History of Central Asia 1:1-678 DOI ↗
W. Granger and W. K. Gregory. 1923. Protoceratops andrewsi, a pre-ceratopsian dinosaur from Mongolia, with an appendix on the structural relationships of the Protoceratops beds. American Museum Novitates 72:1-9
B. Brown. 1914. Leptoceratops, a new genus of Ceratopsia from the Edmonton Cretaceous of Alberta. Bulletin of the American Museum of Natural History 33(36):567-580