Late Oligocene Melia (Meliaceae) from the Nanning Basin of South China and it's biogeographical implication
Late Oligocene Melia (Meliaceae) from the Nanning Basin of South China and it's biogeographical implication
复制标题
华南南宁盆地晚渐新世楝科植物及其生物地理意义
DOI：
10.1186/s42501-021-00097-x
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Jin J.H.
中科院分区：
文献类型：
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作者：
Liu W.Q.;Xu S.L.;Fu Q.Y.;Quan C.;Jin J.H.
[医]楝属是一个只有2-3种的小属，原产于印度-马拉维、印度、巴基斯坦和热带非洲南部。Melia的化石记录是从早中新世到更新世。本文描述了采自南宁盆地晚渐新世永宁组上部的楝属内果皮木乃伊化石。这些保存完好的石质内果皮长8- 14毫米，宽5- 9毫米，有5个室，每个室有一个纺锤形种子。我们将这些内果皮解释为楝属Melia dragonis的内部遗骸，并将它们指定为一个新种：M. santangensissp. nov.这是我国发现的唯一一个有解剖学保存的楝属化石记录，也是迄今为止全球报道的最古老的楝属化石记录。化石记录证实了渐新世晚期楝科植物在亚洲的存在，并为楝科植物的分布和扩散假说提供了证据。
Melia L. is a small genus of only 2–3 species, which is native to Indo-Malesia, India, Pakistan and southern parts of tropical Africa. Fossil records of Melia are known from the early Miocene to the Pleistocene. Here we describe some mummified fossil endocarps of Melia from the upper part of the Yongning Formation (late Oligocene) in Nanning Basin, South China. These well-preserved stony endocarps are 8–14mm long and 5–9mm wide, and have 5 locules with a single spindle seed per locule. We interpret these endocarps as the internal remains of a Melia drupe, and assign them as a new species: M. santangensis sp. nov. This is the only fossil record of anatomically preserved Melia found in China, and also the oldest fossil record of Melia so far reported globally. The fossil record confirms the presence of Melia in Asia at the late Oligocene, and provides evidence supporting the distribution and dispersal hypothesis of the Meliaceae.