| 翻訳と辞書 |
| Sinornithosaurus ： ウィキペディア英語版 |
Sinornithosaurus
''Sinornithosaurus'' (derived from a combination of Latin and Greek, meaning 'Chinese bird-lizard') is a genus of feathered dromaeosaurid dinosaur from the early Cretaceous Period (early Aptian) of the Yixian Formation in what is now China.〔Swisher, Carl C., Wang, Yuan-qing, Wang, Xiao-lin, Xu, Xing, Wang, Yuan. (1999). "Cretaceous age for the feathered dinosaurs of Liaoning, China". ''Nature'' 400:58-61 1 July 1999.〕 It was the fifth non–avian feathered dinosaur genus discovered by 1999. The original specimen was collected from the Sihetun locality of western Liaoning. It was found in the Jianshangou beds of the Yixian Formation, dated to 124.5 million years ago. Additional specimens have been found in the younger Dawangzhangzi bed, dating to around 122 million years ago.
Xu Xing described ''Sinornithosaurus'' and performed a phylogenetic analysis which demonstrated that it is basal, or primitive, among the dromaeosaurs.〔Xu, Xing, Wang, Xiao-Lin, Wu, Xiao-Chun. (1999) "A dromaeosaurid dinosaur with a filamentous integument from the Yixian Formation of China" "Nature" 401:262-266 16 September 1999.〕 He has also demonstrated that features of the skull and shoulder are very similar to ''Archaeopteryx'' and other Avialae. Together these two facts demonstrate that the earliest dromaeosaurs were more like birds than the later dromaeosaurs were.
''Sinornithosaurus'' was among the smallest dromaeosaurids, with a length of about .〔Holtz, Thomas R. Jr. (2011) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,'' (Winter 2010 Appendix. )〕 In 2010, Gregory S. Paul gave higher estimations of 1.2 metres and three kilogrammes.〔Paul, G.S., 2010, ''The Princeton Field Guide to Dinosaurs'', Princeton University Press p. 132〕
==Description==
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「Sinornithosaurus」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.
|
|