苏皖象山群下部一些裸子植物化石及其表皮构造的研究

SOME SPECIMENS OF GYMNOSPERMAE FROM THE LOWER PART OF XIANGSHAN GROUP IN JIANGSU AND ANHUI PROVINCES WITH STUDY ON THEIR CUTICULES

报道象山群下部的裸子植物 5属 5种 :Otozamitessp .,PtilophyllumhsingshanenseWu ,n .emend .,Nilssoniacf.saighanensisSeward ,Pseudoctenissp .,Baieracf.guilhaumatiiZeiller,对其表皮构造进行详细的描述。标本产自安徽宿松、屯溪和江苏南京、江都的象山群下部。

This paper deals with some specimens of Gym nospermaederived from the lower part of Xiangshan Groupin Jiangsuand An huiprovinces ,payingparti cularattention to characteristicsoftheircuticular structures.The sespecimensin clud Ptilophyllumhs ingshanenseWu ,n .emend .,Otozamitessp ., Nilssoniacf.saighanensisSeward ,Pseudoctenissp . and Baieracf .guilhaumatii Zeiller ,beingcollected fromfourlocalities respectively :1)Maoling of Susong County in Anhui Province (WuchangFormation) ;2 ) YutanofTunxiCityinAnhuiProvince (YutanFor mation) ;3)Shifo an of NanjingCityinJiangsu Province (LingyuanFormation)and 4 )Zhuanqiaoof JiangdouCityinJiangsu Province (LingyuanForma tion) .Allthe plant bearing strataaregenerally con sideredtobeLowerJurassicinage .