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对类鸟飞行能力的定量分析揭示了类鸟的分散和飞行损失

Klara Widrig^1,2, Fabio Alfieri^2,3, Pei-Chen Kuo^2,4

¹Department of Vertebrate Zoology, Smithsonian National Museum of Natural History, Washington, DC, USA.

Biology letters

|September 16, 2025

概括

化石鸟骨分析显示,Lithornis promiscuus可能拥有强大的飞行能力,这挑战了关于早期古鸟分散的先前假设. 这一发现有助于解释现代不飞鸟的广泛分布.

科学领域:

古生物学的古生物学
鸟类生物学鸟类生物学
生物力学生物力学

背景情况:

石角鸟类是来自古世时期的化石鸟类,被认为是现代古鸟类 (鼠类和类) 的早期亲属.
现存的古,就像鸟一样,是无法飞行的,只有鸟能够短暂,无氧的飞行.
古的地理分布表明,早期的亲属具有远距离分散能力,但缺乏直接的骨证据.

研究的目的:

为了研究化石鸟*Lithornis promiscuus*的飞行能力和生态.
测试关于干群古的飞行风格和分散能力的假设.
提供早期鸟类分散的定量骨证据.

主要方法:

利用了鸟类冠群的三维几何形态数据集.
分析了Lithornis promiscuus*的胸骨形态.
基于骨形态的模拟飞行能力.

主要成果:

*Lithornis promiscuus*的骨形态与tinamou类的爆发飞行不一致.
形态学支持有氧,的飞行风格,类似于现存的鸟类,具有很高的分散能力.
结果与之前从lithornithid翅膀形状的推断一致.

结论:

至少有一些干古,包括Lithornis,能够长途飞行.
这种能力有助于解释现存的不飞鸟中观察到的跨洋分布.
这项研究为早期鸟类分散策略提供了关键的骨证据.

关键词:

艾维斯·阿维斯 (Aves Aves) 是一个来自美国的小鸟.石角科的动物在古老的古老文明中,古老的古墓是古老的.生物地质和生物地理学功能形态学功能形态学几何形态形态测量是几何形态的.

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