在therian哺乳动物的先驱中,立后肢姿势和功能的晚期获得
Peter J Bishop1,2, Stephanie E Pierce1
1Museum of Comparative Zoology and Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, USA.
Science advances
|October 25, 2024
概括
哺乳动物直立四肢姿势的进化是一个复杂的,非线性过程. 这种转变为直立姿势,对现代哺乳动物至关重要,发生在突触体进化的晚期.
科学领域:
- 古生物学的古生物学
- 生物力学 生物力学
- 进化生物学 进化生物学
背景情况:
- 突触类动物从伸展到直立的肢体姿势的过渡是理解哺乳动物进化的关键.
- 化石记录本身对这种运动运动转移的时间和机制的洞察力有限.
研究的目的:
- 为了研究化石突触类动物中后肢的生物机械性能.
- 为了确定立运动模式是什么时候演化而来的,这是特征性的therian哺乳动物.
主要方法:
- 后肢力量产生能力的生物力学建模.
- 分析了8种化石突触体物种的样本.
- 衡量主要的部肌肉群活动的量化.
主要成果:
- 直立的运动机制直到皇冠菌出现之前才演变.
- 在类动物和早期的类动物中发现了增加运动功能的短暂阶段.
- 在姿势过渡期间,部肌肉功能显示出重新部署和保守主义的混合.
结论:
- 突触体运动运动进化是复杂的和非线性的.
- 运动中的重大进化过渡涉及解剖变化和功能之间的复杂相互作用.
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