Bagaceratops
| Bagaceratops | ||||||||||||
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Skull of Bagaceratops |
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| Temporal occurrence | ||||||||||||
| Upper Crayon (middle Campanium ) | ||||||||||||
| 80.6 to 76.4 million years | ||||||||||||
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| Scientific name | ||||||||||||
| Bagaceratops | ||||||||||||
| Maryańska & Osmólska , 1975 | ||||||||||||
| Art | ||||||||||||
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Bagaceratops is a genus of pelvic dinosaurs (Ornithischia) from the Protoceratopsidae familywithin the Ceratopsia .
features
Bagaceratops was a small, quadruped (four-legged) dinosaur. He was closely related to Protoceratops , which he resembled. At around 1 meter in length, however, it was smaller. The skull was relatively large, the snout was pointed like all Ceratopsians, but shorter than that of Protoceratops . As with all higher ceratopsians, the neck shield was formed from the parietal and scale bones , but was relatively short. On the intermaxillary bone (premaxillary) sat small, pin-shaped teeth, the teeth further back in the mouth were leaf-shaped and adapted to a plant-based diet. There was a small bony crest on the nasal bone .
Discovery and naming
The fossil remains of Bagaceratops were discovered in the Mongolian province of Ömn-Gobi and first described in 1975 . The name is derived from the Mongolian baga (= "small") and the Greek keratops (= "horn face"), a common part of the Ceratopsian name, and alludes to the small size of this dinosaur. The type species is B. rozhdestvenskyi . The remains are dated in the Upper Cretaceous (Middle Campanium ) to an age of 80 to 76 million years.
Systematics
Fastovsky and Weishampel (2005) classify Bagaceratops in the Protoceratopsidae . In 2005 Alifanov described two genera related to Bagaceratops with Lamaceratops and Platyceratops and incorporated these three together with the controversial Breviceratops into a new family, Bagaceratopsidae . According to Makovicky et al. (2006), all of the genera mentioned, as well as Magnirostris, could only be synonyms of Bagaceratops .
literature
- You Hailu, Peter Dodson : Basal Ceratopsia. In: David B. Weishampel , Peter Dodson, Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 478-493, digitized version (PDF; 807.25 kB) .
- David E. Fastovsky , David B. Weishampel: The Evolution and Extinction of the Dinosaurs. 2nd edition. Cambridge University Press, Cambridge et al. 2005, ISBN 0-521-81172-4 .
Individual evidence
- ^ Gregory S. Paul : The Princeton Field Guide To Dinosaurs. Princeton University Press, Princeton NJ et al. 2010, ISBN 978-0-691-13720-9 , pp. 256–257, online ( memento of the original of July 13, 2015 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. .
- ↑ Владимир Р. Алифанов: Два новых динозавра инфраотряда Neoceratopsia (Ornithischia) из отложений верхнего мела мела НинымэгэМтинской кэмэгэмтинской. In: Палеонтологический Журнал. No. 5, 2003, ISSN 0031-031X , pp. 77-88, abstract ( memento of the original from March 6, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. .
- ↑ Peter J. Makovicky , Mark A. Norell : Yamaceratops dorngobiensis, a new primitive ceratopsian (Dinosauria: Ornithischia) from the Cretaceous of Mongolia (= American Museum Novitates. No. 3530, ISSN 0003-0082 ). American Museum of Natural History, New York NY 2006, (PDF; 7.3 MB) .
