甲纪海软组织澄清了 chelonioids 中损失的祖先
Benjamin P Kear1, Roy Nohra2, Johan Lindgren3
1Department of Palaeobiology, Swedish Museum of Natural History, 104 05 Stockholm, Sweden.
iScience
|November 10, 2025
概括
在海洋爬行动物中,的消失是类生物的关键适应. 这项研究揭示了无皮肤是一种古老的海特征,而不是普遍的特征,在不同的血统中独立进化.
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:
- 尺寸损失是海洋爬行动物的常见水力动力适应,在已灭绝和现存物种中见到.
- 现代的硬海 (Cheloniidae) 与一些亲属不同,保留了和状翅膀.
- 海的缩失落的进化历史尚不清楚.
研究的目的:
- 为了调查海的损失的祖先.
- 为了确定海的缩是否是一种普遍的或血统特定的特征.
- 了解海多样化过程中规模损失的进化模式.
主要方法:
- 分析了从白纪中期原生类海化石中保存得非常好的软组织.
- 对化石软组织与现存海形态学的比较分析.
- 祖先状态分析以重建尺度损失的演变.
主要成果:
- 这种化石表现出没有的翅膀皮肤和状,这是早期海的特征.
- 没有的皮肤被证实是Chelonioidea超级家族中的一个古老的特征.
- 尺度损失不是一个无处不在的特征,而是在各种 chelonioid 血统中独立进化.
结论:
- 没有的皮肤是海的祖先特征,早于主要类的分歧.
- 没有的皮肤的进化在不同的海血统中独立地发生了多次.
- 这一特征反映了海在各种海进化路径中对海底环境的反复适应.
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