A euprimate skull from the early Eocene of China

A euprimate skull from the early Eocene of China
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中国始新世早期的真灵长类动物头骨

DOI:
10.1038/nature02126
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发表时间:
2004
期刊:
Nature, Vol. 427
影响因子:
--
通讯作者:
李传夔
李传夔
中科院分区:
其他
文献类型:
--
作者:
倪喜军;王元青;胡耀明;李传夔

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古灵长类动物(具有现代特征的灵长类动物)的首次出现是在始新世早期,大约5500万年前。自它们首次出现以来,最早的真灵长类动物可被区分为Cantius,Donrussellia和Teilhardina。尽管如此,最早的真灵长类动物主要是从孤立的牙齿或破碎的颌骨中发现的。本文描述了一个部分保存完好的真灵长类头骨,其上下齿列几乎完整,是Teilhardina的一个新种,也是该属在亚洲的首次发现。该新种产于中国湖南省灵岔组上段,估计年龄为54.97百万年前。形态学和生殖发育分析表明,新种是Teilhardina最原始的种,位于真灵长类辐射的根部附近。这一迄今为止已知的最早的真灵长类动物头骨的发现为关于真灵长类动物适应性起源的争论提供了新的线索,并表明真灵长类动物最后的共同祖先可能是一种小型的、昼行的、视觉导向的捕食者。
The debut of undoubted euprimates (primates of modern aspect,) was in the early Eocene, about 55 Myr ago. Since their first appearance, the earliest euprimates can be distinguished asCantius,DonrusselliaandTeilhardina,,. Nonetheless, the earliest euprimates are primarily known from isolated teeth or fragmentary jaws. Here we describe a partially preserved euprimate skull with nearly complete upper and lower dentition, which represents a new species ofTeilhardinaand constitutes the first discovery of the genus in Asia. The new species is from the upper section of Lingcha Formation, Hunan Province, China, with an estimated age of 54.97 Myr ago. Morphology and phylogeny analyses reveal that the new species is the most primitive species ofTeilhardina, positioned near the root of euprimate radiation. This discovery of the earliest euprimate skull known to date casts new light on the debate,,,,,,concerning the adaptive origin of euprimates, and suggests that the last common ancestor of euprimates was probably a small, diurnal, visually oriented predator.
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