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智科眼: 双语看懂新科研
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The African ape-like foot of Ardipithecus ramidus and its implications for the origin of bipedalism
非洲猿类脚 of Ardipithecus ramidus及其影响 for 起源 of 两足动物
Thomas Cody Prang
  • Elife Cite this article as: eLife 2019;8:e44433 [全文下载] 扫码分享
  • 影响因子: 7.6 点击(87) 收藏(0) 评分(0)
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  • 生物学
  • 人类进化的祖先状态对于理解双足运动的适应性起源至关重要。这个440万年前属于Ardipithecus ramidus的人类部分骨骼保留了一只据称与猴子有形态关系的脚,但这种解释仍然存在争议。在这里,我展示了Ar的脚。 ramidus与大型类人猿灵长类动物中最活跃的黑猩猩和大猩猩物种相似。 Ar的足部形态。 ramidus认为人类双足行走的进化前体是非洲猿类的陆地四足主义和攀登。中足的伸长和Ar的指骨减少。相对于非洲猿的ramidus与早期形式的两足动物相关的推进能力增加的假设是一致的。这项研究提供的证据表明,现代人类足部来源于适应陆地四足动物的祖先形态。 https://doi.org/10.7554/eLife.44433.001
  • The ancestral condition from which humans evolved is critical for understanding the adaptive origin of bipedal locomotion. The 4.4 million-year-old hominin partial skeleton attributed to Ardipithecus ramidus preserves a foot that purportedly shares morphometric affinities with monkeys, but this interpretation remains controversial. Here I show that the foot of Ar. ramidus is most similar to living chimpanzee and gorilla species among a large sample of anthropoid primates. The foot morphology of Ar. ramidus suggests that the evolutionary precursor of hominin bipedalism was African ape-like terrestrial quadrupedalism and climbing. The elongation of the midfoot and phalangeal reduction in Ar. ramidus relative to the African apes is consistent with hypotheses of increased propulsive capabilities associated with an early form of bipedalism. This study provides evidence that the modern human foot was derived from an ancestral form adapted to terrestrial plantigrade quadrupedalism. https://doi.org/10.7554/eLife.44433.001
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