朱拉纪 plesiosaur 的皮肤,和细胞
Miguel Marx1, Peter Sjövall2, Benjamin P Kear3
1Department of Geology, Lund University, Sölvegatan 12, 223 62 Lund, Sweden.
Current biology : CB
|February 7, 2025
概括
来自德国的化石类动物皮肤显示了无的尾巴和翅膀上的类似的结构. 这些发现提供了关于类动物古生态学的见解,以及海洋爬行动物整体的演变.
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:
- 普莱西类动物是中生代时期的主导海洋爬行动物.
- 类动物的化石软组织极为罕见,这限制了我们对它们的全身的理解.
- 在全球范围内发现了骨遗骸,但关于皮肤结构的详细信息很少.
研究的目的:
- 为了研究一个保存良好的类动物化石的.
- 分析类动物化石皮肤的组成和结构.
- 为了推断 plesiosaur 皮肤的古生态和功能形态.
主要方法:
- 从德国的波西多尼亚页岩中分析了一种低罗纪类动物化石.德国的波西多尼亚页岩.
- 显微镜检查从尾部和前翼的皮肤痕迹.
- 分子分析以确定外套中的有机残留物.
- 化石结构与现代爬行动物的整体相比较.
主要成果:
- Plesiosaur 尾部覆盖物是没有的,并且保留了表皮层,黑色素体和带有细胞核的角质细胞.
- 分子分析表明存在降解的原有机化合物.
- 前翼的整体表现为小的,亚三角形结构,类似于现代爬行动物的.
- 这些类似的结构可能有助于水力动力学或盆地基板相互作用.
结论:
- Plesiosaur 皮是多种多样的,有无的尾巴和可能有的翅膀.
- 翅膀上的的存在可能会提高水力动力性能或基板引力.
- 体特征可能在类动物古生态学中发挥了重要作用,类似于其他海洋爬行动物.
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