中国の白亜紀初期に生息していた長尾の種を食べる鳥
1Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing 100044, China. zhonghe@yeah.net
Nature
|July 26, 2002
まとめ
中国で発見された新しい鳥の化石,Jeholornis primaは,鳥と恐竜のつながりを明らかにしています. この初期の鳥は,高度な飛行特徴と種を食べた証拠を示し,鳥類の進化についての理解を広げています.
科学分野:
- パレオントロジー・パレオントロジー
- 進化生物学の進化生物学について
- 脊椎動物学 脊椎動物学
背景:
- 中国の初期の白期のジェホール群は,初期の鳥類や恐竜を含む例外的な化石で有名です.
- 非鳥類のセロポッドから鳥類への移行を理解することは,進化論の研究にとって極めて重要です.
研究 の 目的:
- Jiufotang Formationの新しい基礎鳥種,Jeholornis primaを記述するために.
- この新しい鳥類の化石の進化的意義と古生態学的適応を調査する.
主な方法:
- 化石の発掘と準備.
- 骨格の特徴の比較解剖学的分析. 骨格の特徴を比較した解剖学的分析.
- 保存された胃の内容物の古生物学的な解釈.
主要な成果:
- 恐竜のような長い尾を持ち,長方形のプレジゴポフィーゼとシェブロンを特徴とする大きな基礎鳥であるJeholornis primaの発見.
- 先進的な胸帯とカーポメタカーポスの特徴を特定し,強力な飛行能力を示唆しました.
- 胃内の多数の植物卵子の保存は,中生期の鳥の種を食べる食生活を示唆しています.
結論:
- Jeholornis primaは,鳥類と非鳥類のセロポッドの系統を橋渡し,重要な発見を表しています.
- この種は,原始的および高度な特徴のモザイクを示し,初期の鳥類の進化の洞察を提供します.
- Jeholornis primaの種子消費の直接的な証拠は,メゾゾイク期の鳥類の食事と古生態学に関する重要なデータを提供します.
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