| 翻訳と辞書 |
| Ningyuansaurus ： ウィキペディア英語版 |
Ningyuansaurus
''Ningyuansaurus'' is a basal oviraptorosaurian dinosaur genus. It contains the single species ''Ningyuansaurus wangi'', known from a fossil specimen from the Early Cretaceous Yixian Formation (Aptian stage, 124.6 Ma ago) of Jianchang, western Liaoning Province, People's Republic of China. It is thought to be the basalmost species of oviraptorosaur, based on its long skull and a greater number of teeth in comparison to any other known oviraptorosaur. The generic name ''Ningyuansaurus'' is derived from Ningyuan, an ancient name for Xingcheng City. The specific name honors Wang Qiuwu, the private owner of the specimen who donated it for scientific study. The specimen is currently housed in the Confuciusornis Museum in Xingcheng.
==Description==
The only known fossil specimen of ''N. wangi'' is notable for having a large number of teeth compared to more advanced oviraptorosaurs, but the teeth in the back of the upper jaw (maxilla) are still reduced in number compared to most other non-avialan theropods. The reduced number of maxillary teeth in ''Ningyuansaurus'' is shared with the scansoriopterygids and other basal oviraptorosaurs such as ''Incisivosaurus''. Though the skull is poorly preserved, the specimen preserved at least 14 teeth in the lower jaw (dentary) and 10 teeth in the upper jaw, four in the premaxilla and six in the maxilla. The teeth were closely packed together and lacked serrations. The eyes were relatively large. The skull was generally triangular in shape but longer than other basal oviraptorosaurs like ''Caudipteryx'', with a straight lower jaw unlike most other oviraptorosaurs.〔
The arms were short, with longer upper arms (humeri) than lower arms (ulna). The legs were long, and the upper leg (femur) was longer than the pelvic bones. The tail was relatively long and feather impressions were found near the tip. Additional feather impressions were identified along the neck.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Ningyuansaurus」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|