ティラノサウルスの古生物学:古代の標本生物に関する新しい研究
Stephen L Brusatte1, Mark A Norell, Thomas D Carr
1Division of Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA. sbrusatte@amnh.org
Science (New York, N.Y.)
|September 18, 2010
まとめ
ティラノサウルス・レックスを含むティラノサウルスは,小さな祖先から頂点の捕食者へと進化した. 大型のティラノサウルスは強力な噛みと鋭い感覚を持ち,生涯にわたって大きく成長する変化がありました.
科学分野:
- パレオントロジー・パレオントロジー
- 脊椎動物生物学 脊椎動物生物学
- 進化生物学の進化生物学について
背景:
- ティラノサウルス・レックスなどのティラノサウルスは,象徴的で広く研究されている絶滅した恐竜です.
- これらは,脊椎動物の古生物学を理解するための重要なモデルとして機能します.
- 最近の発見により,彼らの進化の歴史と生物学の知識が拡大しています.
研究 の 目的:
- ティラノサウルスの進化史を再構築する.
- ティラノサウルス・レクスを含む,派生型ティラノサウルスの生物学的および生体力学的特性を調査する.
- ティラノサウルスのオントジェネティックの変化と生態学的役割を理解するために.
主な方法:
- 新しく記述された種を組み込む系統遺伝分析.
- 化石標本の解剖学的および組織学的研究.
- 噛む力や動きなどの能力を評価するための生体力学分析.
主要な成果:
- ティラノサウルスはジュラ紀中期に誕生したが,白亜紀後期まで,一般的に小さく,生態学的にマイナーであった.
- 大型のティラノサウルスは巨大な噛み力と鋭い感覚を示していた.
- 急速な成長率を含む重要なオントジェネティックの変化は,派生ティラノサウルスで観察されました.
結論:
- ティラノサウルスの進化の軌道は,小規模で限界的な形態から大規模で支配的な捕食者への移行を示しています.
- 強力な噛みと感覚能力を特徴とする大型ティラノサウルスの生物学は,彼らの頂点捕食者の地位を強調しています.
- ティラノサウルスを研究することで,絶滅した種と現存する種の比較生物学に適用できる貴重な洞察が得られます.
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