侏罗纪五种锥叶蕨植物原位孢子及其与分散孢子的关系  

Relationship between dispersed spores and spores in situ of five jurassic plants Coniopteris

作　　者：辛存林[1] 孟健[1] 魏明[1] 陈世伟[1] 都卫东[1] 

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070

出　　处：《兰州大学学报（自然科学版）》2010年第4期7-12,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：甘肃省自然科学基金项目(096RJZA119);西北师范大学地理学重点学科基金项目

摘　　要：通过室内实验分析和镜下鉴定,研究了甘肃窑街盆地中侏罗世五种锥叶蕨的原位孢子,揭示其孢子囊群和原位孢子特征.通过对比发现:其原位孢子与地层中的五种分散孢子较为一致,而且大化石与分散孢子的地史、地理分布范围也相同,因而认为Cyathidites australis是Coniopterismargaretae的孢子,后者为前者的母体植物;Cyathidites medicus是Coniopteris hymenophylloides的孢子,后者为前者的母体植物;Cibotiumspora dicksoniaeformis是Coniopteris lanzhouensis的孢子,后者为前者的母体植物;Punctatisporites triassicus是Coniopteris bella的孢子,后者为前者的母体植物;Cyathidites minor是Coniopteris spectabilis的孢子,后者为前者的母体植物.Five species of Cyathidites plants from the middle jurassic Yaojie basin, Gansu province, were studied based on laboratory experiments and microscopic observation, revealing the characteristics of sporangium and in situ spores of Cyathidites. A comparison of the five in situ spores with the five dispersed spores sampled from the same strata was carried out. In addition, both the regional distribution and phylogenesis of megafossils are identical to that of dispersed spores. As a result, it was suggested that the spores of Cyathidites australis, Cyathidites medicus, Cibotiumspora dicksoniaeformis, Punctatisporites triassicus and Cyathidites minor are equivalent to Coniopteris margaretae, Coniopteris hymenophylloides, Coniopteris lanzhouensis, Coniopteris bella and Coniopteris spectabilis, respectively, indicating that the latter ones belong to the parent plants of the former.

关 键 词：锥叶蕨 原位孢子 侏罗纪 甘肃窑街 

分 类 号：P534[天文地球—古生物学与地层学] Q913[天文地球—地质学]