首页 > 过刊浏览>2015年第89卷第5期 >1453-1469
PDF HTML阅读 XML下载 导出引用 引用提醒
Buxus Leaves from the Oligocene of Guangxi, China and Their Biogeographical Signi?cance
作者:
基金项目:

This research was financially supported by the National Basic Research Program of China (973 Program) (No. 2012CB822003); the Funds of Key Laboratory of Petroleum Resources, Gansu Province (No. SZDKFJJ20150603), the National Natural Science Foundation of China (Nos. 41172022, 41272026); the Funds of Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, CAS (No. Y421140303) and the Fundamental Research Funds for the Central Universities (No. lzujbky-2014-285).


Buxus Leaves from the Oligocene of Guangxi, China and Their Biogeographical Significance
Author:
Fund Project:

This research was financially supported by the National Basic Research Program of China (973 Program) (No. 2012CB822003); the Funds of Key Laboratory of Petroleum Resources, Gansu Province (No. SZDKFJJ20150603), the National Natural Science Foundation of China (Nos. 41172022, 41272026); the Funds of Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, CAS (No. Y421140303) and the Fundamental Research Funds for the Central Universities (No. lzujbky-2014-285).

  • 摘要
    • | |
  • 访问统计
    • |
  • 参考文献
    • |
  • 相似文献
    • |
  • 引证文献
    • | |
  • 文章评论
    摘要:

    The present paper reports two new species of Buxus from the Oligocene Ningming Formation of Guangxi, South China, on the basis of several compressed fossil leaves. Buxus ningmingensis sp. nov. is characterized by an elliptic to ovate shape; pinnate venation with marginal secondary, long hairs on the adaxial side of the midvein base; and amphistomatic, anomocytic stomata with a prominent outer ring. All of these characteristics suggest a closest af?nity to the living Buxus microphylla subsp. sinica. Another new species identi?ed as Buxus preaustro-yunnanensis sp. nov. is characterized by the diagnostic formation of its admedially branched tertiaries, the trunks of which are often strongly thickened by sclereides. This species is most similar to the extant Buxus austro-yunnanensis. The co-occurrence of Buxus ningmingensis sp. nov. and Buxus preaustro-yunnanensis sp. nov. suggests that these two Buxus lived during the Oligocene under a warm, tropical to subtropical climate, similar to the current climate of Ningming. Our ?ndings provide the earliest fossil evidence of Buxus leaves with detailed illustrations of leaf architectural and cuticular features. The occurrence of these two species indicates that Buxus began to diversify in Guangxi no later than the Oligocene.

    Abstract:

    The present paper reports two new species of Buxus from the Oligocene Ningming Formation of Guangxi, South China, on the basis of several compressed fossil leaves. Buxus ningmingensis sp. nov. is characterized by an elliptic to ovate shape; pinnate venation with marginal secondary, long hairs on the adaxial side of the midvein base; and amphistomatic, anomocytic stomata with a prominent outer ring. All of these characteristics suggest a closest af?nity to the living Buxus microphylla subsp. sinica. Another new species identi?ed as Buxus preaustro-yunnanensis sp. nov. is characterized by the diagnostic formation of its admedially branched tertiaries, the trunks of which are often strongly thickened by sclereides. This species is most similar to the extant Buxus austro-yunnanensis. The co-occurrence of Buxus ningmingensis sp. nov. and Buxus preaustro-yunnanensis sp. nov. suggests that these two Buxus lived during the Oligocene under a warm, tropical to subtropical climate, similar to the current climate of Ningming. Our ?ndings provide the earliest fossil evidence of Buxus leaves with detailed illustrations of leaf architectural and cuticular features. The occurrence of these two species indicates that Buxus began to diversify in Guangxi no later than the Oligocene.

    参考文献
    相似文献
    引证文献
引用本文

MA Fujun, WANG Qiujun, DONG Junling, YANG Yi, WANG Wenjia, YAN Defei, SUN Bainian.2015. Buxus Leaves from the Oligocene of Guangxi, China and Their Biogeographical Signi?cance[J]. ACTA GEOLOGICA SINICA(English edition),89(5):1453~1469

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2014-12-30
  • 最后修改日期:2015-02-28
  • 在线发布日期: 2015-10-15
文章二维码
您是第 位访问者
主管单位：中国科学技术协会
主办单位：中国地质学会
地址：北京市阜成门外百万庄26号
电话：010-68999024

京公网安备 11000002000088号 | 京ICP备11041704号
地质学报（英文版） ® 2025 版权所有