来自亚洲最早的鸟类类恐龙的新证据
Xi Yao1, Qi Zhao2,3, Tingcong Ren4
1Center for Vertebrate Evolutionary Biology, Yunnan University, Kunming 650091, China.
iScience
|January 27, 2025
概括
在中国发现了一种新的早期鸟类类恐龙Archaeocursor asiaticus. 这一发现表明,恐龙从冈德瓦纳迁移到劳拉西亚的时间比以前想象的要早.
科学领域:
- 古生物学的古生物学
- 脊椎动物古生物学 脊椎动物古生物学
- 中生代时代研究研究
背景情况:
- 罗纪早期的劳拉西亚具有有限的鸟类类恐龙多样性,主要是装甲恐龙.
- 其他早期的鸟类群体在这个时期特别罕见.
研究的目的:
- 描述一个来自中国罗纪下期的新属和新物种的鸟类类恐龙.
- 确定这个新分类的遗传学位置和古生态意义.
主要方法:
- 遗传学分析以确定进化关系.
- 腿部横截面的骨质组织学分析,以估计年龄和身体尺寸.
主要成果:
- 发现了 * 考古前兆亚洲 * gen. et sp. 的发现. 新. 来自中国西南部的罗纪下期.
- 遗传学分析表明, *Archaeocursor asiaticus* 是最早分离的亚洲鸟类,尽管支持很弱.
- 骨质组织学表明年轻的成年年龄和大约1米的身体长度.
- 在东亚扩展了鸟类的存在到普利恩斯巴希亚/西尼穆里亚晚期阶段.
- 表明鸟类从冈德瓦纳到劳拉西亚的独立和可能更早的分散.
结论:
- *Archaeocursor asiaticus*代表了东亚一个重要的早期鸟类发现.
- 这些发现挑战了以前对鸟类恐龙生物地理和在罗纪早期的分散的理解.
- 这一发现突显了进一步发现亚洲早期鸟类多样性的潜力.
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