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奥塔维皮塞克斯·纳米比内斯 (Otavipithecus namibiensis) 是来自非洲南部的第一个米奥森时期的原始人
G C Conroy1, M Pickford, B Senut
1Department of Anatomy & Neurobiology, Washington University Medical School, St. Louis, Missouri 63110.
Nature
|March 12, 1992
概括
来自非洲纳米比亚的一种新的米奥森原始人化石扩大了这些古猿的已知范围. 这一发现为南非早期的原始人类进化提供了关键证据.
科学领域:
- 古生物学的古生物学
- 灵长类动物的进化
- 非洲古人类学
背景情况:
- 苗代原始人是理解猿类和人类进化的关键.
- 非洲早期人类类动物的化石证据集中在东非.
- 南非对这一关键的进化时期的化石记录有限.
研究的目的:
- 报告在纳米比亚的Berg Aukas发现了一种新的中世纪原始人化石.
- 为了确定这一发现的古生物学意义,作为非洲最南端的米奥森时代原始人种.
- 分析化石下巴及其对南非原始人进化的影响.
主要方法:
- 挖掘和回收的化石遗迹从石填充 breccias.
- 对全型下的详细形态分析 (右体与P4-M3,P3,犬根,切口膜).
- 动物分析以确定含有原始人样本的布雷奇亚的沉积年龄.
主要成果:
- 发现了右下体,这是一个新的米奥纪原始人物种的全型.
- 这种化石代表了在赤道东非以南发现的第一个米奥森原始人,将已知的范围扩展到南20度.
- 部表现出独特的特征,使其与其他非洲和欧亚中期米奥森原始人不同.
- 动物年代约定表明该标本是在中期米欧纪晚期积累的,大约13±100万年前.
结论:
- 这一发现显著扩大了已知的米奥森时代人类在非洲的地理分布.
- 这种化石提供了独特的证据,证明了非洲南部的原始人进化的前奥斯特拉罗皮特纪阶段.
- 这一发现强调了南非对于了解早期原始人种多样性和分散的重要性.
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