在安第斯山脉新发现的上三纪盆地发现的一种长的早期恐龙
E Martín Hechenleitner1,2, Agustín G Martinelli3,4,5, Sebastián Rocher6,7
1Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina. emhechenleitner@gmail.com.
Nature
|October 15, 2025
概括
在阿根廷发现了一种新的早期类恐龙Huayracursor jaguensis
科学领域:
- 古生物学
- 脊椎动物的进化
- 三叠纪生态系统
背景情况:
- 三叠纪晚期的陆地生态系统经历了重大变化,影响了主要的脊椎动物群的多样化.
- 之前关于早期恐龙进化的重要化石发现集中在特定的南美盆地.
- 阿根廷的北方前山盆地以前因其古生物学意义而未被认可.
研究的目的:
- 报告一个新发现的卡尔尼亚四足动物组合从北方Precordillera盆地.
- 描述早期的松鼠类动物Huayracursor jaguensis及其进化影响.
- 提供有关三叠纪晚期脊椎动物和进化趋势的见解.
主要方法:
- 来自圣多明戈古布拉达遗址的卡尔尼亚四足动物组合的挖掘和分析.
- 详细的骨分析早期的形动物Huayracursor jaguensis.
- 与已知的卡尔尼亚和诺里亚赛欧波多形动物进行比较分析.
主要成果:
- 发现Huayracursor jaguensis,一个几乎完整的骨的早期sauropodomorph.
- 标识了典型的晚卡尔尼亚动物组成部分,包括犀牛动物,虫动物和甲虫动物.
- 胡亚拉科索表现出增加的体质和初始的宫延伸,介于卡尔尼亚和诺里亚的形动物之间.
结论:
- 这一发现扩大了南美洲已知的四足动物化石记录.
- 黄鱼代表了类动物进化的早期体型和子长度的显著证据.
- 这一发现有助于了解三叠纪晚期恐龙的多样化.
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