最早可重建的四足动物Parmastega aelidae的形态
Pavel A Beznosov1, Jennifer A Clack2, Ervīns Lukševičs3
1Institute of Geology, Komi Science Centre, Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russia.
Nature
|October 25, 2019
概括
一种来自俄罗斯的早期纪四足动物Parmastega aelidae,为脊椎动物的进化提供了新的见解. 这种化石提供了早期四足动物解剖学和进化关系的关键数据.
科学领域:
- 古生物学
- 进化生物学
- 脊椎动物古生物学
背景情况:
- 德纪四足动物的多样性有所增长,但化石往往是零碎的.
- 我们对早期四足动物的了解主要来自伊希奥斯泰加和阿坎托斯泰加.
- 现有的化石比最早的四足动物的踪迹和碎片更年轻.
研究的目的:
- 描述一个新的早期Famennian四足动物,Parmastega aelidae.
- 使用3D材料重建P. aelidae的头骨和肩带.
- 为了推断P. aelidae的古生物学和遗传位置.
主要方法:
- 来自俄罗斯的化石材料描述.
- 头骨和肩带的重建.
- 贝叶斯式和基于储蓄的遗传学分析.
主要成果:
- 帕马斯塔格·艾利达 (Parmastega aelidae) 属和属 从最早的Famennian (大约. 在三亿七千二百万年前).
- 3D材料可以重建头骨和肩带.
- 它的特征表明它是水生动物,生活在水面上.
- 植物遗传学分析认为帕马斯蒂加是大多数树木中所有其他四足动物的姐妹.
结论:
- 帕马斯泰加属是已知的最古老和最基本的四足动物之一.
- 这一发现增强了我们对四足动物早期进化和多样化的理解.
- 这些发现为从水生生物过渡到陆生生物提供了关键数据.
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