云南墨江羊八寨地区晚二叠世晚期植物群  

LATEST PERMIAN CATHAYSIAN FLORA FROM YANGBAZHAI,MOJIANG IN YUNNAN PROVINCE

作　　者：万明礼[1] 石和[1] 王道永[2] 

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059 [2]成都理工大学地球科学学院,四川成都610059

出　　处：《古生物学报》2011年第2期251-267,共17页Acta Palaeontologica Sinica

基　　金：中国地质调查局云南1:5万骂泥街;牛孔;广丰;作播幅区调项目(编号:1212010880406)资助

摘　　要：首次比较系统地记述云南墨江羊八寨地区晚二叠世羊八寨组植物化石,共计17属26种。墨江地区晚二叠世晚期植物群新的发现,对该区羊八寨组地质时代判定,以及植物地理分区上都具有重要意义。表明墨江地区晚二叠世植物群的高度分化、繁衍,补充和完善其生物多样性,证明该区在晚二叠世晚期仍然是华夏植物群华南亚区的一部分。It is well known that southwestern China including western Guizhou and eastern Yunnan has been relatively an ideal place for the research of the Permian-Triassic floral transition because the Permian-Triassic terrestrial deposits there are continu-ous and fossiliferous.Recent investigation on the biostratigraphy of the Mojiang region in Yunnan yielded abundant plant fossils from the Late Per-mian Changhsingian Yangbazhai Formation.This latest Permian flora includes 19 species of 14 genera.The dominant plant taxa such as Gigantopteris dictyophylloides,Gigantonoclea hallei,Lobatannularia cathaysiana,Facipteris densata,Taenio-pteris crassinervis and Cathaysiodendron acutangulum are all typical elements of the well known Cathaysian flora.As a consequence,this flora indicates that the latest Permian flora in this region are certainly of the Cathaysian type,which differs from those latest Permian floras from northern China that are more comparable with the Subangaran and Euramerican floras.The present flora adds new significant information to our understanding on the floral evolution through the Permian and Triassic.

关 键 词：植物群 晚二叠世晚期 墨江 云南 

分 类 号：Q914[天文地球—古生物学与地层学]