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在形蛇的陆地到海洋过渡期间,快速进化和形空间扩张在陆地到海洋过渡期间
Emma Sherratt1, Jenna Crowe-Riddell1, Alessandro Palci1,2,3
1School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, Australia.
Evolution; international journal of organic evolution
|October 15, 2025
概括
生态转变驱动了海蛇 (Elapidae) 的快速头骨形状演变. 这种形态变化先于增加的物种化速率,在重大进化变化过程中揭示了异步多样化.
科学领域:
- 进化生物学是进化的生物学.
- 古生物学的古生物学
- 比较解剖学的比较解剖学.
背景情况:
- 生态转变可以刺激快速的表型进化.
- 在重大转变期间了解进化的节奏和模式至关重要.
- 类蛇 (Elapidae) 为研究各种环境中的多样化提供了一个模型.
研究的目的:
- 分析陆地,两动物和海洋息地间的形蛇的头骨形状变化.
- 为了研究与海蛇从陆地向海洋过渡相关的进化速率和模式.
- 探索骨形态进化与类类的物种化率之间的关系.
主要方法:
- 使用几何形态测量方法对骨形状变化的比较分析.
- 遗传学比较方法推断进化速率和祖先状态.
- 对91种陆地,两动物和海洋鱼物种的检查.
主要成果:
- 在活生生的海蛇的陆地到海的过渡期间,观察到头骨形状演变速率的显著增加.
- 海蛇头骨形态转移到一个独特的形态空间区域,其特点是较高的前面对面区域,低沉的鼻子和更宽的悬浮体.
- 头骨进化加速,随后是狭头骨 (Hydrophis) 和宽头骨 (Aipysurus) 类别之间的二分法,狭头骨在Hydrophis的轴性骨架进化和物种化之前.
结论:
- 形蛇从陆地向海洋的转变引发了加速的头骨进化.
- 形态和谱系多样化的速度可能是异步的,特别是在经历重大生态转变的广泛群体中.
- 头骨形态在促进后来的进化创新和海蛇的多样化方面发挥了关键作用.
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