
2015年3月,第21卷,第1期,105-116页 March2015,Vol.21,No.1,pp.105-116
DOI:10.16108/j.issn10067493.2014114
高
校地质学报
Geological Journal of China Universities
云南临沧晚中新世械属叶片和翅果研究
王云峰,邵洋,李斌科,刘珂男,解三平*
兰州大学地质科学与矿产资源学院,兰州730000
摘要:云南省是研究我国植物多样性,植物区系演化及被子植物迁徒路线的有利场所。文中鉴定并描述了采自云南临沧上中新统邦卖组的械属(Acer)8块叶片和17块翅果化石,共鉴定为4个种,其中包括1个新种和1个相似种,分别为Acerlincangensesp.nov.和Acercf.jingdongense。械属化石在云南邦卖组的出现,证明了该植物群具有北温带和古热带的混生特征,反映了当时植物区系类型的多样化构成了云南现代植物多样性的基础。另外,通过对Acer全球大化石记录以及现生种的统计,总结得出械属的地史演化具有3个发展高峰期:依次为始新世、中新世和全新世,从古至今呈现一种螺旋式递增趋势。
关键词:临沧;邦卖组;晚中新世;械属;生物多样性
中图分类号:Q914
文献标识码:A
文章编号:10067493(2015)01-010512
AcerLeaves and Samarasfrom the Late Miocene ofLincang,
Yunnan Province
WANGYunfeng,SHAOYang,LIBinke,LIUKenan,XIESanping
School of Earth Sciences, Lanzhou University, Lanzhou 730000, China
Abstract:Yunnan Province is a favorable place for investigation of plants diversity, floristic evolution and migration routes of angiosperms. In this study, eight leaf impressions and seventeen winged fruits of Acer from the upper Miocene Bangmai Formation of Lincang, Yunnan Province were investigated. They are assigned into four species, including one new species-Acer lincangense sp, nov. and one conformis-Acer cf. jingdongense. The occurrence of the genus Acer in the Bangmai Formation provides the evidence that the Lincang flora was mixed with elements of the north temperate and paleotropical zones, And this character of Neogene floristic diversity formed the basis of modern plant diversity in Yunnan Province. Furthermore, on the basis of statistical analysis of the number of fossil species at different geological periods and extant species at present, the evolutionary history of the diversity of Acer can be divided into three optimum phases, i.e., the Eocene, the Miocene and the post-Holocene. The diversity of Acer at species level is spirally increased through the three evolutionary cycles.
Key words: Lincang; Bangmai Formation; Late Miocene; Acer; biodiversity
Corresponding author: XIE Sanping, Associate Professor; E-mail: hai3p@163.com
械属(Acer)属于械树科(Aceraceae),是组成现代北温带阔叶林最大的属之一(徐廷志, 1998)。目前,该属大约有129个现生种,主要分
收稿日期:2014-07-09;修回日期:2014-11-20 基金项目:国家自然科学基金(41172021;40802008)
布于亚洲、欧洲、北美和非洲北缘。其中一半以上的种类分布在东亚,中国则是械属植物最集中分布的地区,约99种(FloraofChinaEditonial
作奢简介:王云峰,男,1988年生,硕士研究生,研究方向为古植物与环境变化;E-mail:wangyf12@lzu.edu.en
*通讯作者:解三平,男,1977年生,副教投,研究方向为古植物学;E-mail:hai3p@163.com