吉林南部义和盆地早侏罗世几种苏铁类化石及其古气候意义  

EARLY JURASSIC FOSSIL CYCADS FROM YIHE BASIN IN SOUTHERN JILIN PROVINCE: Paleoclimatic significance

作　　者：孙春林[1,2] 李涛[1,2] 孙跃武[1,2] 陈跃军[1,2] 李春田[1,2] 赵国伟[1,2] 

机构地区：[1]东北亚生物演化与环境教育部重点实验室,吉林长春130026 [2]吉林大学古生物学与地层学研究中心,吉林长春130026

出　　处：《地质与资源》2010年第1期1-8,共8页Geology and Resources

基　　金：高等学校博士学科点项科研基金(项目编号2005018306)资助

摘　　要：报道了吉林南部早侏罗世义和植物群中的苏铁类化石3属7种,即Pterophyllum baotoum Zhang,Pterophyllum exhibens Li,Pterophyllum cf.tietzei Schenk,Pterophyllum sp.,Nilssonia inouyei Yokyama,Nilssonia orientalis Heer,Cycadolepiscorrugata Zeiller.同时,讨论了苏铁类化石的古气候意义,认为吉林南部早侏罗世时期位于濒古太平洋带,气候温暖潮湿,有利于苏铁类繁茂生长.Abundant fossil cycad leaves preserved as impression are collected from the Early Jurassic Yihe Formation in Southern Jilin Province, China. In this paper, three genera belonging to seven species are recognized based upon leaf morphology, i. e. Pterophyllum baotoum Zhang, PterophyUum exhibens Li, Pterophyllum cf. tietzei Sehenk, Pterophyllum sp., Nilssonia inouyei Yokoyama, Nilssonia orientalis Heer and Cycadolepis corrugata Zeiller. The occurrence of these species in the Early Jurassic of Southern Jilin significantly infers that they grew in an area witha warm and humid climate in the warm temperate zone close to Paleopacific Ocean.

关 键 词：吉林南部 早侏罗世 苏铁类 古气候 

分 类 号：Q914.3[天文地球—古生物学与地层学] Q914.5[生物学—古生物学]