Early Mid-Pleistocene mammal fauna from Yanlidong Cave, South China
Early Mid-Pleistocene mammal fauna from Yanlidong Cave, South China
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DOI：
10.1080/08912963.2023.2185886
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发表时间：
2023-03
影响因子：
1.4
通讯作者：
Yanyan Yao;Y. Fan;C. Bae;Chunqi Tian;Hua Liang;Jun Chen;Bei Zhang;Shanshan Wei;Q. Shao;W. Liao;Wei Wang
中科院分区：
文献类型：
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作者：
Yanyan Yao;Y. Fan;C. Bae;Chunqi Tian;Hua Liang;Jun Chen;Bei Zhang;Shanshan Wei;Q. Shao;W. Liao;Wei Wang
阎立洞是中国南方的一个洞穴遗址，最近在那里发现了多种脊椎动物古生物化石。前人的研究表明，雁里洞沉积可分为早期和晚期。在此，我们报告了对雁里洞（DES-YLD）早期沉积物中哺乳动物化石的分析。通过对牙齿化石和层状流石的铀系列测年，DES-YLD的年龄被限制在600 ka左右。动物群的特点是既有丰富的现存类群，也有一些灭绝的物种。对DES-YLD区系的古环境和区系学分析表明，当地环境为亚热带森林覆盖，位于靠近水的灌木环境中，啮齿动物对大型哺乳动物遗骸的积累和改造负有主要责任。YLD的发现填补了中国南方早中更新世的一个重要空白。除了古环境的重建外，有趣的是，大量早更新世灭绝的类群被中更新世早期的物种所取代，这些物种至今仍然存在。这种动物更替可能与全球中更新世气候转变有关。
Yanlidong is a cave site in southern China where a diversity of vertebrate palaeontological fossils were recently discovered. Our previous study showed that the Yanlidong sediments can be divided into an early stage and a late stage. Here, we report our analysis of the mammal fossils from the deposits of the Early Stage in Yanlidong (DES-YLD). The age of DES-YLD is constrained to around 600 ka by Uranium-series dating on fossil teeth and layered flowstones. The fauna is characterised by the occurrence of extant taxa plentifully, but also a number of extinct species. Our paleoenvironmental and taphonomic analysis of the DES-YLD fauna indicates that the local environment was covered by subtropical forest and located in a shrub environment near water and rodents were largely responsible for the accumulation and modification of the macromammal remains. The findings from YLD serve to fill an important gap in the Early Middle Pleistocene of southern China. Besides the reconstructions of the paleoenvironment, it is interesting to observe that a large number of Early Pleistocene extinct taxa were replaced by species during the Early Middle Pleistocene that are still extant today. This faunal turnover may be related to the global Middle Pleistocene climate transition.