摘要
本文是对浙江中生界火山碎屑沉积岩地层中的孢子花粉的分析研究(共发现孢粉26属40多种),同时对浙西建德县和浙东新昌县含孢粉层位的时代提出了初步意见,此外,系统描述了主要孢粉类型9属16种,其中11新种。
More than forty species assigned to 26 genera of spores and pollen grains arediscovered from the Mesozoic volcanic clastic sedimentary rocks in Zhejiang.Sixteenspecies are here described,including 11 new species as listed below:Cicatricosispori-tes Zhejiangensis sp.nov.,Cicatricosisporites pinguis sp.nov.,Lygodium crassus sp.nov.,?Trilobosporites applanatus sp.nov.,Agathis?mirus sp.nov.,Agathis fortis sp.nov.,Ephedra grandis sp.nov.,Welwitschiapites gracilis sp,nov.,Cedrus minutus sp.nov.,Piceites simplex sp.nov.,and Podocarpus gracilis sp.nov.,The presentspores and pollen grains occur mainly in the lower part of the Shouchang formationin Jiande of Western Zhejiang and the Guantou formation in Xinchang ofeastern Zhejiang,which may be referred respectively to the late Upper Jurassicand the early-middle Lower Cretaceous.Discussion is also made on the cla-ssification and nomenclature of gymnospermous pollen grains with equatorial zoni-colpate and distal pore,which were designated by some palynologists as the genus ofclassopallis.But from the palaeobotanical viewpoints,these pollen grains belongprobably to different genera of a single family.According to variant exine ornamen-tations on the equator,it seems that the different genera of these pollen grains maybe readily distinguished as in Pagiophyllumpollenites,Monilapollis,etc.Actual exa-mples are here given to substantiate the classification useful for the stratigraphicdivision and correlation.
作者
张璐瑾
Zhang Lujin(Nanjing Institute of Geology and Paleontology,Academia Sinica)
出处
《古生物学报》
1978年第2期180-194,244-247,256,共20页
Acta Palaeontologica Sinica
