中文摘要：

雷口坡组是四川盆地内一套以灰岩、白云岩夹岩溶角砾岩及砂泥岩为主并含石膏、盐岩的沉积地层，产丰富海相动物化石，时代属中三叠世早期。本文从重庆市统景镇雷口坡组3块样品中获得了大量微体植物化石，是该组微体植物化石的首次发现，对其生物群具有重要的补充意义。组合中见有Aratrisporites granulatus，A．paraspinosus，Lundbladispora sp．和Taeniaesporites kraeuseli等常见于三叠纪的陆生植物孢粉以及海相疑源类Sulcusicystis echinatus，时代为中三叠世，与海相动物化石所示时代一致。后者或许可作为区域地层对比的标志化石。

英文摘要：

The Leikoupo Formation is a Middle Triassic lithostratigraphic unit of the Sichuan Basin, which is primarily composed of limestone and dolomite interbedded with karst breccias, sandstone and mudstone. Abundant marine faunal fossils have been found from this formation. In this paper, microfloral fossils from this formation are reported for the first time from Tongjing Town, Chongqing, which furnishes an important supplement to the biota. This flora contains a series of terrestrial pollen that commonly occur in T Aratrisporites granulatus , A. rlassl spores and c including paraspznosus, LundbZadispora sp. and Taeniaesporites kraeuse li, implying a Middle Triassic age. There a large number of marine acritarch Sulc are also uszcystzs echinatus in the assemblages, which might be useful for regional stratigraphic correlation.