来自中国的一个不寻常的Oviraptorosaurian恐龙
Xing Xu1, Yen-Nien Cheng, Xiao-Lin Wang
1Institute of Vertebrate Paleontology & Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing 100044, China. xing_xu@sina.com
Nature
|September 20, 2002
概括
一种新的恐龙,Incisivosaurus gauthieri,在中国被发现. 这种Oviraptorosaurian有动物般的牙,表明一种食草动物的饮食,并扩大了我们对类动物多样性的理解.
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
- 进化生物学 进化生物学
背景情况:
- 卵性龙类动物 (Oviraptorosaurians) 是一群特有特殊头骨的热足类恐龙.
- 卵类恐龙和其他热足动物群体之间存在显著的形态差距.
研究的目的:
- 为了描述一个新的oviraptorosaurian物种,incisivosaurus gauthieri.
- 为了分析Incisivosaurus gauthieri. 的牙和头骨形态.
- 为了研究这种新恐龙的进化关系和生态影响.
主要方法:
- 在中国的低白时期的石形成的化石挖掘和分析.
- 头骨和牙特征的比较解剖学研究.
- 遗传学分析以确定进化关系.
主要成果:
- 发现了Incisivosaurus gauthieri,这是一种具有低低的头骨和有牙的下的新型卵石龙.
- 独特的牙特征包括类似动物的前牙和带着磨损面的形牙.
- 这些特征表明一种食草的饮食,在类动物中以前是未知的.
结论:
- 刺骨类恐龙 (Incisivosaurus gauthieri) 弥合了卵石类恐龙 (oviraptorosaurs) 和其他类恐龙之间的形态差距.
- 特殊的牙表明非鸟类类类类动物在草食方面发生了趋同的进化.
- 这一发现凸显了热足恐龙中显著的生态多样性.
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