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The Late Pleistocene Orangutan from Tham Prakai Phet: New discoveries
Annales de Paléontologie ( IF 1 ) Pub Date : 2019-04-20 , DOI: 10.1016/j.annpal.2019.03.004
Arnaud Filoux , Athiwat Wattanapituksakul

This paper describes the collection of isolated orangutan fossil teeth identified in the newly excavated material from Tham Prakai Phet, a site located in the Chaiyaphum Province in northeast Thailand. The collection is composed of 18 isolated teeth belonging to Pongo. The morphology of the upper and lower teeth is similar to that of fossil and extant orangutans from mainland Indochina and Indonesia. Only the wrinkles on the occlusal surface are less pronounced and sometimes simpler than extant orangutans. The dimensions of the teeth fall in the range of variation of fossil and extant specimens, but the distribution of the crown areas of the Tham Prakai Phet specimens fall above the mean value observed for extant orangutans. This new collection of continental orangutans confirms the persistence of this taxa in this part of Thailand up to the late Pleistocene, and provides new data useful for understanding the evolution of this hominoid and advance in the reconstitution of the evolutionary lineage of Pongo. The size of the sample from Tham Prakai Phet is not sufficient to determine an accurate taxonomic attribution; pending the increase of the current sample, we attribute the material to Pongo sp. (Pongo aff. weidenreichi).



中文翻译:

Tham Prakai Phet的晚更新世的猩猩:新发现

本文描述了从泰国Thai Prakai Phet的新挖掘出的材料中鉴定出的孤立的猩猩化石牙齿的集合,Tham Prakai Phet位于泰国东北部的猜也蓬府。该集合由属于Pongo的18个孤立的牙齿组成。上,下牙的形态与印度支那大陆和印度尼西亚的化石和现存的猩猩相似。与现存的猩猩相比,仅咬合表面的皱纹不那么明显,有时更简单。牙齿的尺寸落在化石和现存标本的变化范围内,但Tham Prakai Phet标本的冠状区域分布低于现存猩猩的平均值。陆生猩猩的这一新集合证实了这一类群在泰国这一地区直至更新世晚期的持续存在,并提供了有助于理解这种类人猿进化以及在重建庞哥进化谱系方面取得进展的新数据。Tham Prakai Phet的样本大小不足以确定准确的分类学归因;在当前样本增加之前,我们将材料归因于Pongo sp。(猩猩AFF。weidenreichi)。

更新日期:2019-04-20
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