在中国的白纪陆地生态系统中,龙的多样性和动物的周转
Xiaolin Wang1, Alexander W A Kellner, Zhonghe Zhou
1Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing 100044, China. xlinwang@263.net
Nature
|October 7, 2005
概括
来自中国的两种新龙物种揭示了意想不到的欧洲联系和多样化的白纪飞行爬行动物群. 这些发现突出了Jehol的重点.
科学领域:
- 古生物学的古生物学
- 脊椎动物动物学 脊椎动物动物学
- 甲时期的生态系统
背景情况:
- 中国东北部的Jehol生物群为白纪陆地生态系统提供了关键的见解.
- 了解龙的多样性和分布是重建中生代环境的关键.
- 之前的研究表明,Jehol地区的龙多样性有限.
研究的目的:
- 描述来自Jehol集团的两个新的龙标本.
- 分析这些新发现的分类学 afinities 和古生态学意义.
- 为了研究中国东北部的类动物的多样性和动物流动.
主要方法:
- 对新发现的龙化石进行了形态分析.
- 与全球已知的龙物种进行比较的解剖学.
- 化石载体形成的平流图分析 (Yixian和Jiufotang).
主要成果:
- 描述了两个新的类动物:Feilongus youngi (与Gallodactylidae相关) 和Nurhachius ignaciobritoi (具有与Istiodactylus*相似的独特牙形态).
- 这些物种代表了以前在中国东北部未知的欧洲群体,增加了Jehol pterosaur的多样性.
- 动物周转的证据,原始的龙被衍生形式所取代,鸟类和龙之间存在明显的息地划分 (内陆与沿海).
结论:
- 杰霍尔龙动物群表现出无与伦比的多样性,包括具有欧洲血缘关系的种类.
- 新的发现揭示了白纪生态系统中的显著动物周转和复杂的生态相互作用.
- 龙和鸟类占据了不同的生态,鸟类主导内陆,而龙更喜欢沿海地区.
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