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最古のサウロポッド恐竜として知られている.
E Buffetaut1, V Suteethorn, G Cuny
1Centre National de la Recherche Scientifique, Paris, France. Eric.Buffetaut@wanadoo.fr
Nature
|September 19, 2000
まとめ
タイでトライアス紀後期のサウロポッド骨格の発見は,これらの恐竜のジュラ紀期以前の最初の骨の証拠を提供します. この発見は,トライアス期の初期のサウロポッド進化の理論を裏付けている.
科学分野:
- パレオントロジー・パレオントロジー
- 脊椎動物の古生物学について
- 恐竜族 (Dinosauria) とは
背景:
- サウロポッドは,ジュラ紀と白亜紀に支配的な恐竜であったが,これらの時代以前の進化の起源は不明である.
- 以前は,最も古いサウロポッドの証拠は,ジュラ紀初期の骨とトライア紀の足跡であった.
- サロポッドの初期の進化史は,恐竜の多様化を理解する上で重要なギャップです.
研究 の 目的:
- 最古の確実なサウロポッド骨格の遺骸の発見を報告するために.
- トライアス紀後期におけるサウロポッドの存在に関する骨質学的証拠を提供するためである.
- サウロポッド恐竜の初期の進化と多様化を調査する.
主な方法:
- 化石化した骨格の残骸の発掘と分析.
- 発見されたサウロポッド化石の比較解剖学的研究.
- 化石を積んだ岩層のストラティグラフィック年代測定.
主要な成果:
- タイのトライアシク後期からの不完全なサウロポッド骨格の発見.
- この化石は,ジュラ紀より前のサウロポッドの最初の骨質学的証拠を表しています.
- この標本には,既知のプロザオロポッドと区別する明確な特徴があります.
結論:
- トライアス紀後期のサウロポッドの発見は,トライアス紀中のサウロポッドの進化のより長い期間を確認しています.
- この発見は,初期のサウロポッドの多様化に関する理論的モデルを裏付けている.
- 標本のユニークな解剖学は,初期のサウロポッドの特徴に光を当てています.
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