在洞形动物的动物周转后,分离的多样性和差异
Juan D Carrillo1,2, Maria Fernanda Torres Jimenez3, Francisco J Urrea-Barreto4,5
1CR2P (CNRS, MNHN, Sorbonne Université), Département Origines et Évolution, Museum National d'Histoire Naturelle, Paris75005, France.
Proceedings. Biological sciences
|March 12, 2026
概括
进化动态揭示了兄弟动物群,Octodontoidea和Chinchilloidea的对比轨迹. 尽管过去的大小差异很大,但灭绝导致了相似的体重范围,而牙差异仍然存在.
科学领域:
- 进化生物学 进化生物学
- 古生物学的古生物学
- 哺乳动物学 哺乳动物学
背景情况:
- 洞形动物表现出不平衡的多样化,Octodontoidea (195种) 的数量超过了Chinchilloidea (6种).
- 化石记录表明Chinchilloidea的过去多样性和差异更大,包括已知最大的动物.
- 了解进化动态是解释这些对比的多样化模式的关键.
研究的目的:
- 为了研究进化动态如何塑造姐妹动物群,Octodontoidea和Chinchilloidea的对比多元化轨迹.
- 用现存和灭绝物种的数据重建人体质量和牙进化模式.
主要方法:
- 遗传学框架的重建.
- 分析身体质量的演变.
- 评估牙差异的演变.
主要成果:
- Chinchilloidea表现出更高的身体质量进化的速度,扩展到一个更广泛的尺寸范围比Octodontoidea.
- 新生代和四级灭绝逆转了人体质量差异的趋势,导致两种类型的范围相似.
- 牙差异的演变不同,最初在Chinchilloidea中更高,但后来在Octodontoidea中更大,尽管发生了多样化和灭绝事件,但仍然稳定.
结论:
- 分类学多样性,人体质量和牙形态独立进化,证明了这些进化特征的脱.
- 进化动态是复杂的,即使在居住在同一大陆的姐妹群体内也是如此.
- 灭绝事件显著影响了人体质量差异,在数百万年内重塑了进化轨迹.
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