沙尼达尔3号"敲响了钟声":虚拟胸重建及其对理解尼安德特人骨架平面的影响
José M López-Rey1, Daniel García-Martínez2, Markus Bastir3
1Paleoanthropology Group, Department of Paleobiology, Museo Nacional de Ciencias Naturales (MNCN-CSIC), Calle José Gutiérrez Abascal, 2, 28006, Madrid, Spain; Department of Biology, Faculty of Sciences, Universidad Autónoma de Madrid (UAM), Calle Darwin, 2, 28049, Madrid, Spain.
Journal of human evolution
|December 12, 2024
概括
尼安德特人的胸,包括沙尼达尔3,与智人相比,呈现出不同的形状,与适应寒冷的人类聚集在一起. 尽管有尺寸差异,但尼安德特人有更大,更坚固的胸,与人类相比.
科学领域:
- 古人类学古人类学.
- 人类进化人类进化
- 骨生物学 骨生物学
背景情况:
- 肋形态对于理解人类进化至关重要.
- 尼安德特人的肋骨特征仍在争论中,与Homo sapiens相比,与一个不同的形态相比存在争议.
- 肋骨和脊椎的化石证据很少,这使进化研究复杂化.
研究的目的:
- 为了重建和比较尼安德特人和Homo sapiens的胸形态.
- 确定是否存在一个标准化的尼安德特人胸形态型,以及它与现代人类的区别.
- 为了研究胸大小,形状和原始人环境适应之间的关系.
主要方法:
- 三维几何形态学应用在尼安德特人 (沙尼达尔3,凯巴拉2) 和智人胸上.
- 使用Procrustes距离来分析形状差异的等级聚类.
- 对心脏状元大小进行转换试验,以评估大小变化.
- 线性回归和主要组件分析来检查全量学.
主要成果:
- 尼安德特人的胸 (沙尼达尔3,凯巴拉2) 呈现出"钟形"胸,与智人不同.
- 尼安德特人的胸形状更像是适应寒冷的智人种群.
- 在尼安德特人和温带/热带智人之间发现了显著的尺寸差异,但不是适应寒冷的人.
- 确定了胸大小和形状之间的全度关系,表明在人类变异范围内的尼安德特人胸更大,更坚固.
结论:
- 与大多数智人相比,尼安德特人的肋骨具有独特的形态,与适应寒冷的特征保持一致.
- 莱万特尼安德特人 (沙尼达尔3,凯巴拉2) 之间的肋骨相似性挑战了一个普遍适应寒冷的尼安德特人骨架的概念.
- 尼安德特人的肋骨大小和形状属于更广泛的智人类范围,这表明有显著的重叠和变化.
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