アロメトリックスケーリングは,最古のアーカイオプテリックス (Archaeopteryx lithographicaca) に見られる
Science (New York, N.Y.)
|January 12, 1990
まとめ
アーキオプテリクスの化石は単一の成長シリーズを表しており,それは彼らが走行と飛行能力を有する温血で,急速に成長する内熱生物であった可能性が高いことを示唆しています. これらの発見は,恐竜の進化と化石の解釈を理解するのに役立ちます.
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
- 比較解剖学 比較解剖学とは
背景:
- アーキオプテリクスは原始的な鳥だと広く考えられているが,その正確な分類は議論の余地がある.
- アーキオプテリクスの6つの化石標本が存在し,その発達段階と分類的割り当てに関する疑問を提起しています.
研究 の 目的:
- アーカイオプテリックス化石の分類分類と発達段階を調査する.
- 成長パターンを分析し,Archaeopteryx.の生理学的特徴を推測する.
- 考古学研究におけるアロメトリックモデルの有用性を探求する.
主な方法:
- アーカイオプテリックス化石からの骨質学的データのアロメトリックスケーリング.
- 他の恐竜,現存するエクトーサーム,現存するエンドーサームの成長グラデーションとアロメトリックパターンの比較.
- 多変量アロメトリックモデルの応用.
主要な成果:
- 6つのアーカイオプテリクスの標本はすべて,単一の成長シリーズに属していることに一致しています.
- 特定の骨融合の欠如は,どの標本も完全に成長していないことを示しています.
- アロメトリックパターンは,Archaeopteryxは,急速な成長と早熟の走行 / 飛行能力を有するホメオサーミックなエンドサームであったことを示唆しています.
結論:
- アーキオプテリクスの化石は,単一のオントジェネティック軌道内の個体を表しています.
- 生理学的および行動的推論は,Archaeopteryxを高度な,鳥のような恐竜として支持しています.
- 多変量アロメトリーは,化石記録におけるオントゲニーとフィロゲニーを解読するための強力なツールです.
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