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已知最早的类恐龙是最早的类恐龙
E Buffetaut1, V Suteethorn, G Cuny
1Centre National de la Recherche Scientifique, Paris, France. Eric.Buffetaut@wanadoo.fr
Nature
|September 19, 2000
概括
在泰国发现一个特里亚斯纪晚期的类动物骨,提供了这些恐龙在罗纪时期之前的第一个骨证据. 这一发现支持了三叠纪时期早期类动物进化的理论.
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
- 恐龙类 (Dinosauria) 是一个恐龙类.
背景情况:
- 类动物是罗纪和白纪的主导恐龙,但它们在这些时期之前的进化起源仍然不清楚.
- 在此之前,最古老的类动物证据包括罗纪早期的骨头和有争议的罗纪足迹.
- 足动物的早期进化历史是理解恐龙多样化的重要差距.
研究的目的:
- 为了报道发现最早的确定的类动物骨遗骸的发现.
- 提供关于三纪晚期赛欧波德存在的骨科证据.
- 为了研究类恐龙的早期进化和多样化.
主要方法:
- 化石骨遗骸的挖掘和分析.
- 发现的类动物化石的比较解剖学研究.
- 化石载体岩层的分层测年法.
主要成果:
- 来自泰国的三叠纪晚期的不完整的类动物骨的发现.
- 这种化石代表了罗纪时期之前类动物的第一个骨质学证据.
- 该标本表现出明显的特征,使其与已知的前类动物有所区别.
结论:
- 特里亚斯纪晚期的赛罗波德发现证实了在特里亚斯纪期间赛罗波德进化的较长时期.
- 这一发现证实了早期类动物多样化的理论模型.
- 该标本独特的解剖学揭示了早期的类动物的独特性.
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