Mummified fossil woods of Fagaceae from the upper Oligocene of Guangxi, South China
Mummified fossil woods of Fagaceae from the upper Oligocene of Guangxi, South China
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广西渐新世上层壳斗科木乃伊木化石
DOI：
10.1016/j.jseaes.2017.11.029
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发表时间：
2018-02-01
影响因子：
3
通讯作者：
Oskolski, Alexei A.
中科院分区：
文献类型：
--
作者：
Huang, Luliang;Jin, Jianhua;Oskolski, Alexei A.
根据广西南宁盆地渐新世上层保存完好的木乃伊木材，描述了三个新化石种，其中两种属于槠属（C. nanningensis 和 C. guangxtensiS），一种属于器官属（L. nanningensis）。这两个槠属植物代表了中国和东南亚地区该属最古老可靠的木材记录，而东南亚是现存物种多样性的中心。栲属的化石叶记录表明该属已于始新世晚期迁徙到华南地区。这些木材化石证据证实了渐新世晚期该地区存在并持续存在槠属植物。在永宁组中，存在大量具有微弱或不存在生长轮边界的壳斗科树林（南宁山毛榉），偶尔与显着的环孔图案相关，表明广西（华南）在渐新世晚期具有季节性（可能是季风性）热带气候。
Three new fossil species, two attributed to the genus Castanopsis (C. nanningensis and C. guangxtensiS) and one to the organ genus Lithocarpoxylon (L. nanningensis) are described on the basis of well-preserved mummified wood from the upper Oligocene of Yongning Formation in the Nanning Basin, Guangxi Province, South China. The two species of Castanopsis represent the most ancient reliable wood record of this genus in China and also southeastern Asia, which is the center of diversity of extant species. The fossil leaf records of Castanopsis indicated this genus has migrated to South China in the late Eocene. This fossil wood evidence confirms the presence and persistence of Castanopsis in this region in the late Oligocene. In the Yongning Formation, the presence of numerous Fagaceae woods with faint or absent growth ring boundaries (in C. nanningensis) occasionally associated with prominent ring-porous patterns, suggests that Guangxi (South China) had a seasonal (probably monsoonal) tropical climate during the late Oligocene.