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Updated: May 12, 2026
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来自中国的一种考古前类 (Archaeopteryx) 之前的类 (troodontid theropod) 动物,在尾上有长长的羽毛
Dongyu Hu1, Lianhai Hou, Lijun Zhang
1Paleontological Institute, Shenyang Normal University, 253 North Huanghe Street, Shenyang 110034, China. hudongyu@synu.edu.cn
Nature
|October 2, 2009
概括
一个来自中国的新型三形恐龙化石.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 脊椎动物动物学 脊椎动物动物学
背景情况:
- 由于罗纪化石记录稀少,我们对衍生非飞行类热足动物的早期进化了解甚少.
- 这种知识差距助长了"时间悖论"论点,反对鸟类的热足动物起源.
研究的目的:
- 描述一个新的,特别保存的脚动物标本,来自最早的罗纪晚期.
- 提供有关热足动物分歧时间线和早期羽毛进化的见解.
- 解决鸟类起源研究中的"时间悖论".
主要方法:
- 化石标本的挖掘和详细的形态分析.
- 化石载体形成的平层测年法. 化石载体形成的平层测年法.
- 与已知热足动物和鸟类类的比较解剖学研究.
主要成果:
- 发现了一种保存良好的特罗顿类类脚动物,来自中国的Tiaojishan山脉.
- 该标本表现出广泛的羽毛,包括脚上的羽毛.
- 这一发现挑战了"时间悖论",因为它确立了鸟类类脚动物的早期存在.
结论:
- 这种特罗类化石提供了关于热足动物进化和分歧的关键数据.
- 广泛的羽毛表现出复杂的体特征,接近恐龙-鸟类过渡.
- 这一发现驳斥了"时间悖论",并支持鸟类起源的热足动物假设.
相关概念视频
01:23Phylogeny
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
02:56The Fossil Record
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
01:54Convergent Evolution
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.