考古学:オルニティスキー類の恐竜の親の介護
Qingjin Meng1, Jinyuan Liu, David J Varricchio
1Dalian Natural History Museum, 40 Xicun Street, Heishijiao, Shahekou, Dalian, China.
Nature
|September 10, 2004
まとめ
化石の証拠によると,恐竜は親の介護をしていました. Psittacosaurusの化石は,34匹の幼虫と1匹の成虫を示しており,これはDinosauriaの化後の介護を示している.
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:
- 親の介護は,ワニや鳥などの生きているアーコサウルに観察されています.
- 絶滅したアーコサウルス,特に恐竜における親の介護の進化的起源は,ほとんど不明のままである.
- 恐竜の親の介護に関する化石の証拠は稀で,進化論の理解を妨げている.
研究 の 目的:
- 絶滅した恐竜における親の介護の存在と性質を調査する.
- 恐竜の親の介護行動を支持または反論する化石の証拠を提供するために.
- アーコサウリアの親の介護の進化を理解するために貢献する.
主な方法:
- Psittacosaurus sp.の化石標本 (ダリアン自然史博物館D2156) の分析について
- 化石における1つの成体と複数の幼虫の間の空間的関係に関する詳細な調査.
- 保存文脈の古生物学的な評価は,行動を推論する.
主要な成果:
- 注目すべき化石標本には,34匹の幼虫と集まった1匹の成虫のプシタコサウルスが保存されています.
- 狭い領域内の大人と多くの幼虫の近接は,凝固したグループを示唆しています.
- この配列は,この恐竜の種で,化後の親の介護のための強力な証拠を提供します.
結論:
- ピスタコサウルスの化石は,恐竜の化後の親の世話に関する説得力のある証拠を提供します.
- この発見は,親の介護が以前考えられていたよりも恐竜時代に広く存在していた可能性があることを示唆しています.
- 恐竜の親の介護を理解することは,絶滅した爬虫類の社会的行動の進化と,現代の鳥との関係についての洞察を提供します.
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