一个晚代纪的龙重新配置了Actinistian的基因组,差异性和进化动态
Alice M Clement1, Richard Cloutier2,3,4, Michael S Y Lee2,5
1College of Science and Engineering, Flinders University, Adelaide, 5042, Australia. alice.clement@flinders.edu.au.
Nature communications
|September 12, 2024
概括
一个新的德纪龙化石揭示了这个龙的进化转变.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 脊椎动物动物学 脊椎动物动物学
背景情况:
- 鱼 (Actinistia) 是一种古老的鱼类,通常被称为"活化石".
- 它们属于一个形态上保守的脊椎动物群.
- 在进化研究中,活着的科属Latimeria是标志性的.
研究的目的:
- 为了描述一个新的3D保存的罗化石从晚期德纪戈戈形成.
- 分析所有大鱼的分类,进化速率和形态差异.
- 为了了解进化轨迹和关键的过渡阶段在鱼的历史.
主要方法:
- 描述了一种新的化石长标本.
- 关于大黄蜂的综合遗传学分析.
- 在地质时间内评估形态差异和进化速率.
主要成果:
- 描述了一种来自德纪晚期戈戈岩层的新古龙化石.
- 在德纪和德纪后的龙之间发生了形态差异的显著转变.
- 在白纪中期之后,主要的形态创新在很大程度上停止了,而其他特征继续演变.
结论:
- 这种新化石代表了长进化中的关键过渡阶段.
- 构造活动是大黄蜂进化速率变化的最可能驱动因素.
- 科莱坎特的进化表明了创新和逐渐变化的不同阶段.
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