中国 の オリゴセーン の 霊長類 は,アフリカ と アジア の 霊長類 の 進化 の 違い を 示し て い ます
Xijun Ni1, Qiang Li2, Lüzhou Li3
1Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Chinese Academy of Sciences, 142 Xi Zhi Men Wai Street, Beijing, 100044, China. Chinese Academy of Sciences (CAS) Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China. nixijun@ivpp.ac.cn.
まとめ
エオセーン・オリゴセーン移行 (EOT) は,大きな野生生物の変化を引き起こした. 中国での新しい化石発見は アジアの霊長類が アフロアラビアと違って ストレプシリンによって支配されていたことを明らかにし 進化のフィルターとして EOTを強調しました
科学分野:
- 古生物学
- 進化生物学
- 霊長類の進化
背景:
- 約3400万年前のエオセヌ・オリゴセヌ移行期 (EOT) は,地球温暖化と野生動物の転移が顕著であった.
- アジアにおける EOTに対する霊長類の進化的反応の理解は,この大陸におけるオリゴセンの霊長類の化石記録の不足によって制限されている.
研究 の 目的:
- アジアの霊長類の進化に対する EOT の影響を調査する.
- オリゴセーン初期アジアの霊長類の動物を特徴づけ,アフリカ・アラビアの同時代の動物と比較する.
- 霊長類の多様化のための進化的フィルターとしての EOT の役割を評価する.
主な方法:
- 中国南部のオリゴセンの初期から様々な霊長類の化石の発見と分析.
- 新しく発見されたアジア類の霊長類と,アフリカ・アラビアの既知のオリゴセンの霊長類の比較分析.
- 古生物学的な年代測定と 古生物学的な環境再構築
主要な成果:
- 中国南部のオリゴセンの初期から多様な霊長類が確認されています.
- このアジア系動物は主にストレプシリン類の霊長類で構成され,オリゴセンのアフリカ・アラビアの人類類が支配する動物と大きく対照的です.
- パレオゲネとネオゲネのアジア人種の集合体との間に明確な断絶が見られる.
結論:
- アジアとアフロアラビアの霊長類は,EOTの気候の悪化に対して異なる反応を示しました.
- EOTは重要な進化のフィルターとして機能し,旧世界における霊長類の系統に差異的に影響を与えた.
- この発見は,この重要なケノゾーイク期の霊長類の複雑な生物地理的および進化的動態を強調しています.
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