Caenagnathasia
| Caenagnathasia | ||||||||||||
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Lower jaw fragments from Caenagnathasia |
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| Temporal occurrence | ||||||||||||
| Upper Cretaceous (late Turonian to Coniacian ) | ||||||||||||
| 91.4 to 86.3 million years | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Caenagnathasia | ||||||||||||
| Currie , Godfrey & Nessov , 1993 | ||||||||||||
| Art | ||||||||||||
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Caenagnathasia was a theropod dinosaur belonging to the Oviraptorosauria group thatlivedin the Upper Cretaceous of Uzbekistan . Within the Oviraptorosauria, this little-known genus belongs to the Caenagnathids .
Caenagnathasia is known only from two incomplete lower jaws ( holotype ; catalog number N 401/12457 and paratype; catalog number N 402/12457), which come from the rock layers of the Bissekty formation and are therefore approx. 91 to 86 million years old (late Turonian to Coniacium ). This is the earliest known Caenagnathid. The only species Caenagnathasia martinsoni was first described in 1993 by Currie, Godfrey and Nessov . Caenagnathasia was the smallest Caenagnathidae known. The lower jaw showed an almost straight upper edge, with no teeth or tooth-like protrusions. Presumably, like other oviraptorosaurs, it was herbivorous or omnivorous. Caenagnathasia differs from the North American Chirostenotes in various features on the jaws, such as the less pronounced ribbing on the lingual side of the occlusal edge .
The name Caenagnathasia means something like "New pine from Asia" and is made up of Caenagnathus ( Gr. Kaine "new" and gnathos "pine") and the ancient Greek Asia ("Asia").
literature
- Halszka Osmólska , Philip J. Currie , Rinchen Barsbold : Oviraptorosauria. 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. 165-183, here p. 182.
Web links
- Oviraptorosauria ( Memento of July 8, 2009 in the Internet Archive ) at "The Theropod Database" (in English)
- Caenagnathasia martinsoni , life reconstruction
Individual evidence
- ^ Philip J. Currie, Stephen J. Godfrey, Lev Nessov: New caenagnathid (Dinosauria: Theropoda) specimens from the Upper Cretaceous of North America and Asia. In: Canadian Journal of Earth Sciences. Vol. 30, No. 10, 1993, ISSN 0008-4077 , pp. 2255-2272, doi : 10.1139 / e93-196 .
- ↑ Ben Creisler: Dinosauria Translation and Pronunciation Guide. Archived from the original on November 20, 2010 ; accessed on March 1, 2013 .