已知最古老的类人后骨化石和高级灵长类动物的早期进化
D L Gebo1, M Dagosto, K C Beard
1Department of Antrophology, Northern Illinois University, DeKalb 60115, USA. dgebo@niu.edu
Nature
|April 5, 2000
概括
早期灵长类动物Eosimias的化石脚骨揭示了关键的解剖特征. 这些发现证实了Eosimias是人类类动物,并澄清了子,子和人类的进化起源.
科学领域:
- 古生物学的古生物学
- 灵长类动物的进化
- 人类类起源的起源
背景情况:
- 灵长类动物Eosimiidae家族的灵长类动物对于理解人类的起源至关重要.
- 以前的知识仅限于牙和石遗骸,导致了遗传学上的不确定性.
- 在中国和缅甸发现了Eosimiidae化石.
研究的目的:
- 为了描述来自中欧时代的Eosimias的新化石脚骨.
- 为了澄清Eosimiidae在灵长类动物进化中的遗传地位.
- 为Eosimias.提供解剖学证据,证明其人类状况.
主要方法:
- 挖掘和分析来自中国中欧时代沉积物的化石Eosimias脚骨.
- 对Eosimias tarsals与现存和化石人类类动物进行比较解剖分析.
- 遗传学分析包括新的脑后骨数据.
主要成果:
- 埃奥西米亚斯 (Eosimias tarsals) 的体表现出与现存和化石人类类动物共享的衍生解剖特征.
- 这些特征支持Eosimias在Anthropoidea中的分类.
- 早期人类类动物的后骨显示出原始和衍生特征的混合.
结论:
- 新的化石证据巩固了Eosimias作为早期人类类动物的地位.
- 这说明了人类类动物和其他灵长类动物群体之间的进化关系.
- 早期的人类类动物从哈普洛林祖先进化而来,保留了一些类似前类动物的特征.
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