中国の低白亜紀の巨大な羽ばたき恐竜です
Xing Xu1, Kebai Wang, Ke Zhang
1Institute of Vertebrate Paleontology and Paleoanthropology, Key Laboratory of Evolutionary Systematics of Vertebrates, Chinese Academy of Sciences, 142 Xiwai Street, Beijing 100044, China. xingxu@vip.sina.com
Nature
|April 7, 2012
まとめ
巨大な新しい羽ばたき恐竜,ユティランヌス・フライが中国で発見されました. この発見は,大きな羽根の恐竜の存在を直接的に証明し,初期の羽根の進化に関する新しい洞察を提供します.
科学分野:
- パレオントロジー・パレオントロジー
- 脊椎動物学 脊椎動物学
- 進化生物学の進化生物学について
背景:
- 最近中国から発見された羽ばたき恐竜には,主に小さな種が含まれています.
- 初期のティラノサウロイドの進化的関係と物理的特徴は完全に理解されていません.
研究 の 目的:
- この発見を報告し,新しい巨大な基礎型のティラノサウロイド,ユティランヌス・フライについて説明する.
- Y. huali. の系統的位置と成長戦略を調査する.
- 広範囲に羽根を張った巨大な恐竜の存在の直接的な証拠を提供するために.
主な方法:
- 下白亜紀のイクシアン群から,Y. hualiの3つのほぼ完全な骨格の発掘と分析.
- 頭蓋骨および頭蓋骨後骨格の特徴の比較解剖学的分析.
- 成長戦略を評価し,他のティラノサウロイドと比較するための形態測定分析.
主要な成果:
- ユティランヌス・フワリ (Yutyrannus huali) の発見,中国の下白亜紀の巨大な基礎型ティラノサウロイド.
- Y. hualiは,三指のマヌスと典型的なセロポッドを含む,基礎的および派生型ティラノサウロイドの両方の特徴を有しています.
- 重要な発見:Y. hualiは長い糸状の羽を現しており,大型の恐竜は広く羽根を被っていたことを示しています.
結論:
- ユティランヌス・フワリ (Yutyrannus huali) は,これまでに知られている最大の羽根を持つ非鳥類の恐竜である.
- この発見は,恐竜の羽根分布に関する以前の仮定に異議を唱えている.
- 初期のティラノサウロイドの羽と巨大性の進化に関する重要な洞察を提供します.
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