云南临沧晚中新世类黄杞及其古生物地理意义

来源 :古生物学报 | 被引量 : 0次 | 上传用户:summerweixi
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
通过对产自云南临沧邦卖盆地的9块类黄杞翅果化石形态特征的观察和研究,将它们鉴定为3个种。其中包括1个新种临沧类黄杞(Palaeocarya lincangensis Shao and Xie sp.nov.),还包括2个已知种云南类黄杞(Palaeocaryayunnanensis)和长翅类黄杞(Palaeocarya longialata)。Palaeocarya lincangensis主要特征为:羽状脉,中、侧裂片长度近似相等,果翅裂片基部与顶端宽度相差不大;侧裂片分裂较浅,无始叶;未见小坚果,果柄较长。另外,对类黄杞化石记录的全球统计表明:类黄杞在始新世至渐新世最为繁盛,之后逐渐衰落;现生黄杞族的分布范围进一步退缩至低纬度地区。这与渐新世以后全球气候逐渐变冷的趋势相一致。研究类黄杞与现生黄杞族脉序特征发现:亚洲地区的类黄杞绝大多数为羽状脉序,与分布于东亚和东南亚地区的现生Engelhardia和Alfaropsis相似;美洲和欧洲地区的类黄杞绝大数为三出脉,与分布于中美洲地区的现生Oreomunnea和Alfaroa一致。 Through the observation and research on the morphological characteristics of nine species of Huangqiqi fruit fossils from the Linpang Bupan Basin in Yunnan Province, they were identified as three species. Among them, a new species of Palaeocarya lincangensis Shao and Xie sp. Nov., Also includes two known species of Palaeocaryaununanensis and Palaeocarya longialata. The main characteristics of Palaeocarya lincangensis are: pinnate, middle and lateral lobes are approximately equal in length, base and top widths of fruit wing lobes are not much different; lateral lobes are shallowly divided and without primary leaves; In addition, the global statistics on the records of the genus Huangqi showed that Gentiana macrophylla was the most prosperous from the Eocene to the Oligocene, then gradually declined; the range of the genus Huangqi further retreated to the lower latitudes. This is in line with the gradual cooling of the global climate after the Oligocene. The study on the characteristics of the vein of Huangqi and the existing Huangqi family found that the majority of the genus Astragalus in Asia are plume veins, similar to the native Engelhardia and Alfaropsis distributed in East Asia and Southeast Asia. In the Americas and Europe The vast majority of the yellow jasmine is three veins, consistent with the current lives of Oreomunnea and Alfaroa in Central America.
其他文献
目的 探讨中医辩证疗法在治疗皮肤湿疹中的应用效果.方法 本研究自2018年2月开始,总研究时间为1年,研究对象为研究期间诊疗的120名皮肤湿疹患者,共将其随机分为两组(M组和N组
传统的语文复习方式是教师简单的知识点概述,学生不断做练习的方式,导致学生的课业压力越来越大,学习效率也得不到真正的提高。所以,在课程改革下,在“以生为本”理念的指导
期刊