化石大脑提供了早期海在水下养的证据
George A Lyras1, Lars Werdelin2, Bartholomeus G M van der Geer3
1Faculty of Geology and Geoenvironment, Department of Historical Geology-Palaeontology, National and Kapodistrian University of Athens, 15784, Zografos, Greece.
Communications biology
|August 17, 2023
概括
早期的足动物依靠他们的胡须生存,这是一个祖先的特征,帮助他们从陆地过渡到海洋生物. 这项研究揭示了胡须的使用是如何成为两动物适应的关键.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 海洋生物学 海洋生物学
背景情况:
- 类动物,如海,适应了海洋生物,使用翅膀和精简的身体进行运动.
- 现代足动物广泛使用他们的胡须 (vibrissae) 进行环境探索和猎物检测.
- 最早的足动物是陆地或淡水居民,类似于现代类动物.
研究的目的:
- 为了重建一个早期的类动物 (Potamotherium) 的水下食行为.
- 为了研究胡须 (vibrissae) 在早期足动物的生存和适应中的作用.
- 了解从陆地动物向两动物海洋食肉动物的进化过渡.
主要方法:
- 对7种化石和31种现存的食肉动物大脑中的冠状回形进行分析.
- 冠状环处理头部的体感官输入,提供对感官器官使用的见解.
- 比较神经解剖学被用来推断灭绝物种的感觉能力.
主要成果:
- 现代足动物依赖胡须是一种祖先的特征,而不是最近的适应.
- 增强的vibrissae感官输入可能促进了干足动物在海洋环境中的生存.
- 该研究确定了水下食的关键适应,这对于陆地到海洋的过渡至关重要.
结论:
- 基于胡须的感觉感知是类动物进化过程中关键的祖先特征.
- 早期的足动物适应了水下食,特别是胡须的使用,使它们能够成功地过渡到海洋息地.
- 这项研究揭示了食肉动物进化史中的显著生态转变.
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