【摘要】 本文记录了鄂西秭归盆地东缘泄滩组上部 2 1个属 36个种的孢粉植物群 ,其中包括 3个新种。讨论了主要属种组合特征和地层延限。根据中侏罗世孢粉植物群组合在国内外的对比 ,提出泄滩组上部 Cyathidites minor-Classopollis- Callialasporites组合的时代属于中侏罗世。这个组合以桫椤科、掌鳞杉科植物的繁盛 ,和出现大量 Cal-lialasporites母体植物为特点 ,暗示泄滩组上部形成于炎热而干旱的气候环境。更多还原

【Abstract】 A total of 21 genera and 36 species of spores and pollen, including 3 new species, are recorded from the Upper Xietan Formation in the eastern margin of the Zigui Basin, W. Hubei. The assemblage characteristics and stratigraphic ranges of main genera and species are discussed. Based on the correlation with the Middle Jurassic assemblages at home and abroad, the Cyathidites minor Classopollis Callialasporites assemblage from the Upper Xietan Formation is proposed to be Middle Jurassic in age. The assemblage is characterized by the flourishing of Cyatheaceae, Cheirolepidiaceae and by the appearance of a number of parent plants of Callialasporites , suggesting that the Upper Xietan Formation would have been formed in a warm and quite dry environment.更多还原