最古老的南方类动物揭示了早期的海洋爬行动物全球化
Benjamin P Kear1, Aubrey J Roberts2, George Young3
1The Museum of Evolution, Uppsala University, Norbyvägen 16, SE-75236 Uppsala, Sweden.
Current biology : CB
|June 18, 2024
概括
来自南半球的已知最古老的海洋爬行动物,来自新西兰的nothosaur,揭示了类爬行动物远比以前认为的早得多地分散在全球.
科学领域:
- 古生物学的古生物学
- 海洋生物学 海洋生物学
- 进化生物学 进化生物学
背景情况:
- 类类动物代表了最长寿的海洋爬行动物类,其化石在全球范围内发现.
- 以前的证据表明,早期的类动物进化仅限于北半球.
研究的目的:
- 描述在南半球发现的地质上最古老的海上爬行动物.
- 为了重建早期的分散模式和sauropterygians的进化辐射.
主要方法:
- 来自新西兰的中特里亚斯纪沉积物的诺索索的化石发现和描述.
- 时间尺度的祖先范围估计,使用遗传学和化石数据.
主要成果:
- 发现了南半球最古老的海洋爬行动物,这是一个来自新西兰中特里亚斯纪 (阿尼西亚) 的著名动物.
- 祖先的范围估计表明从北方泰提斯分散到高古度 (>60°S) 的高古度 (>60°S).
结论:
- 类爬行动物在其进化历史上早期表现出快速的全球化和广泛的分散.
- 这种分散与它们在波斯纪末期大规模灭绝后的适应多样化相吻合.
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