最古老的关节骨鱼来自早期的Silurian时期
You-An Zhu1,2, Yang Chen1,2,3,4, Qiang Li5
1Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China.
Nature
|March 4, 2026
概括
一个新发现的早期罗纪鱼化石提供了最古老的骨科动物 (骨鱼) 的证据. 这一发现揭示了骨鱼的早期辐射比以前理解的更为多样化.
科学领域:
- 古生物学与脊椎动物的进化
- 早期脊椎动物的生物多样性
背景情况:
- 骨科动物 (骨鱼),包括肉科动物和动科动物,是脊椎动物生物多样性的关键.
- 骨类动物的前德纪前化石记录稀少,有关节化石出现在西卢里亚和德时期的后期.
研究的目的:
- 报道发现了一个从早期的Silurian重庆 Lagerstätte关节,近乎完整的osteichthyan.
- 为了确定已知最古老的骨质动物,包括微化石,可追溯到大约4.36亿年前.
主要方法:
- 挖掘和分析来自早期鲁纪的化石遗迹 重庆仓库.
- 化石的形态特征,将其特征与已知的干状孔德里希,斑皮动物和骨状动物进行比较.
- 用贝叶斯推断和最大储蓄方法进行遗传学分析,以确定化石的进化位置.
主要成果:
- 发现了一种微小的,有关节的骨类动物,具有一般化的身体规划和plesiomorphic字符.
- 这种化石展示了原始骨质的特征和在actinopterygians中常见的特征的独特组合.
- 遗传学分析将新鱼置于骨菌茎上,尽管它的确切位置仍然部分未解决.
结论:
- 这一发现显著增加了已知的Silurian骨质动物的多样性,并填充了骨质动物干群.
- 在早期骨类动物中观察到的形态差异表明,在西卢里亚到早期德纪期间,骨鱼的辐射比以前证明的更为广泛.
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