牙形态和遗传学"地方"的奥斯特拉洛皮塞克斯Sedibaba
Joel D Irish1, Debbie Guatelli-Steinberg, Scott S Legge
1Research Centre in Evolutionary Anthropology and Palaeoecology, School of Natural Sciences and Psychology, Liverpool John Moores University, Liverpool, UK. j.d.irish@ljmu.ac.uk
Science (New York, N.Y.)
|April 13, 2013
概括
奥斯特拉罗皮塞克斯 (Australopithecus sediba) 的牙特征揭示了原始和衍生特征的混合. 这些发现支持与Homo相关联的南非南方类,表明进化联系.
科学领域:
- 古人类学古人类学.
- 灵长类动物学 灵长类动物学
- 人类进化人类进化
背景情况:
- 澳大利亚白座 (Australopithecus sediba) 的下图需要进一步的表征.
- 牙形态学为人类进化提供了关键的见解.
研究的目的:
- 在MH1和MH2标本中详细介绍22个非米度牙特征.
- 使用遗传学分析,将这些特征与其他非洲原始人进行比较.
主要方法:
- 描述22个非度量牙特征在AU. 这是Sedibá.
- 与其他八个非洲原始人样本进行了定性和遗传比较.
- 使用大猩猩外组进行克拉迪斯基分析.
主要成果:
- 在. Au. 在. 塞迪巴表现出原始和衍生牙特征的马赛克.
- 从东非澳大拉罗皮斯的区别,主要在牙的特征.
- 形成一个南非澳大拉罗皮特类与Au. 非洲人,共享特征,如卡拉贝利的UM1和原始类型LM1.
- 有证据表明与Homo habilis/rudolfensis + Homo erectus共享的衍生状态.
结论:
- 在. Au. 在. sediba与A. Au. 分享衍生品的特征. 非洲人,形成一个独特的南非澳大利亚人类.
- 南非澳大拉罗皮斯和早期的Homo之间存在着重要的进化联系.
- 牙证据支持一个包含南非南方和人类的类,由LM1 cusp 7表达证明.
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