类恐龙的食物进化是由牙磨损揭示的
Attila Ősi1,2, Paul M Barrett3, András Lajos Nagy4
1ELTE Eötvös Loránd University, Institute of Geography and Earth Sciences, Department of Palaeontology, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary. osi.attila@ttk.elte.hu.
Nature communications
|August 26, 2024
概括
甲类恐龙的牙磨损和更换随着时间的推移而加快,这表明向更严格的植物饮食转变. 这些养适应与后来的物种体型的增加有关.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 生物力学 生物力学
背景情况:
- 甲类恐龙为食草动物而发展出了特殊的牙.
- 甲类动物的牙磨损,牙更换和饮食之间的相互作用仍未得到充分研究.
研究的目的:
- 为了研究牙磨损率,牙置换率和牙微磨损在类动物进化中的关系.
- 根据牙适应来重建饮食变化.
主要方法:
- 测量牙置换率和牙磨损量.
- 对牙微磨损模式的分析.
- 重建磨损率和冠状形成不对称.
主要成果:
- 牙磨损和牙更换率在整个类动物进化过程中显著增加.
- 在后来的种群中观察到不对称的牙冠形成和加速的牙更换.
- 微穿的复杂性在深度巢和后来的类动物中减少,这表明饮食的转变.
结论:
- 早期的类动物很可能会浏览或消费水果.
- 深度息的美洲狮可能是大量食者,食用更坚固,更少营养的植物.
- 饮食变化与增加的体重和肠道通道时间相关.
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