地质科技情报2011，Vol.30Issue(5)：36-40,5.
甘肃窑街中侏罗世 Coniopteris margaretae的原位孢子与分散孢子的关系
Relationship Between Spore in Situ and Dispersed Spore of Coniopteris margaretae of the Middle Jurassic from Yaojie, Gansu Province
摘要
Abstract
This paper studies in situ spore of Coniopteris margaretae from middle Jurassic Yaojie Basin, Gansu Province by laboratory experiments. The study summarizes the basic characteristics of the spores which are shaped tetrahedron, showing a polar view of a round triangle and the equator plane view from the semicircle and are big in volume, with the diameter of polar view' varying from 50 to 70μm at an average about 64μm and whose length is 2/3 to 3/4 of the radius. The pores are mainly yellowish brown, with flat 3-rays, and smooth exine without ornamentation, and no perispore. The analysis indicates that the spores of Coniopteris margaretae is Cyathidites austrlis, with the latter as maternal plants of the former. The confirmation of this relationship provides a new clue for further research of the Coniopteris margaretae geographical distribution and ecological characteristics. The Jurassic sporopollen data from China show that prosperous pteridophyte and gymnosperm are dominated in subtropical and tropical, but Hirmerella plants in drought climatic zone in Aalenina-Bajocian palynoflora are scarce. Therefore, it can be deduced that the paleoclimate in Yaojie Basin was warm and humid subtropical climate in Aalenina-Bajocian, Middle Jurassic.关键词
Coniopteris margaretae/原位孢子/中侏罗世/窑街组/甘肃Key words
Coniopteris margaretae / in situ spore/ Middle Jurassic/ Yaojie Formation/ Gansu Province分类
生物科学引用本文复制引用
辛存林,陈世伟,都卫东,魏明..甘肃窑街中侏罗世 Coniopteris margaretae的原位孢子与分散孢子的关系[J].地质科技情报,2011,30(5):36-40,5.基金项目
甘肃省自然科学基金项目(096RJZA119) （096RJZA119）
西北师范大学地理学重点学科和生态经济基金项目 （）
