在eosauropterygian辐射的黎明时代,高表型可塑性
Antoine Laboury1, Torsten M Scheyer2, Nicole Klein3
1Evolution & Diversity Dynamics Lab, Université de Liège, Liège, Belgium.
PeerJ
|September 6, 2023
概括
早期海洋爬行动物Eosauropterygians在三纪期间表现出明显的适应性. 它们的多样化形式,是由牙差异驱动的,揭示了海洋爬行动物祖先的早期进化可塑性.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 海洋脊椎动物古生物学
背景情况:
- 在特里亚斯纪生物复苏期间的eosauropterygia辐射对于海洋爬行动物的统治至关重要.
- 之前的研究表明,eosauropterian形态多样性的高峰是在三叠纪中期,其中Pachypleurosauroidea,Nothosauroidea和Pistosauroidea同时出现.
- 在过去的差异分析中,对特里亚斯纪种类的有限关注阻碍了对它们的中特里亚斯纪多样化和形态空间占用的理解.
研究的目的:
- 量化分析三叠纪eosauropterygians的多样化和生态形态空间占用.
- 为了研究在中三叠纪期间Eosauropterygia内部的形态差异和进化模式.
- 了解牙差异和养专业化在eosauropterygian多样化中的作用.
主要方法:
- 用多变量形态测量分析来评估形态差异.
- 在主要的eosauropterygianclades中对牙特征和推断的养专业化的比较分析.
- 检查多样化模式的区域差异,特别是在泰提斯海洋内.
主要成果:
- 由Pachypleurosauroidea,Nothosauroidea和Pistosauroidea在生态形态空间的明显殖民,全身融合有限.
- 牙差异和养专业化是观察到的进化模式的主要驱动因素.
- 显著的区域多样化,其中Pachypleurosauroidea在Pelsonian期间在东部Tethys显示出显著的多样化.
结论:
- 三叠纪的eosauropterygians表现出高的现型可塑性,这也是后来的海性 plesiosaurians 的特征.
- 这三大类的独特进化轨迹凸显了它们对各种海洋环境的适应能力.
- 类类动物是高度适应的海洋爬行动物,在三纪中期已经明显出现了显著的多样化.
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