河南东南部早石炭世植物群  

EARLY CARBONIFEROUS FLORA IN SOUTHEASTERN HENAN

作　　者：陈芬[1] 孙克勤[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《Acta Botanica Sinica》1996年第4期312-317,共6页Acta Botanica Sinica（植物学报：英文版）

摘　　要：研究了河南东南部商城和固始杨山组植物化石，共计１１ 属１８ 种。它们分属于石松纲、楔叶纲、真蕨纲、种子蕨纲、科达纲和裸子植物种子，其中以石松纲鳞木类植物占优势。杨山组植物群含有一些典型的早石炭世分子， 如 Ａｒｃｈａｅｏｃａｌａｍ ｉｔｅｓ ｓｃｒｏｂｉｃｕｌａｔｕｓ、Ｃａｒｄｉｏｐｔｅｒｉｄｉｕｍ ｓｐｅｔｓｂｅｒｇｅｎｓｅ、Ｒｈｏｄｅｏｐｔｅｒｉｄｉｕｍｈｓｉａｎｇｈｓｉａｎｇｅｎｓｅ，它们在维宪期至纳缪尔早期地层是颇为常见的；然而这一植物群也含有某些华夏型的鳞木类植物，即Ｌｅｐｉｄｏｄｅｎｄｒｏｎ ｃｆ．ａｏｌｕｎｇｐｙｌｕｋｅｎｓｅ、Ｌ．ｓｈａｎｙａｎｇｅｎｓｅ、Ｌ．ｃｆ．ｓｕｂｒｈｏｍ ｂｉｃｕｍ 等。根据植物群的总体组成，杨山组植物群的地质时代属于早石炭世晚期，大致相当于维宪晚期至纳缪尔Ａ期。当前植物群可以与甘肃东部、陕西山阳、华南和马来西亚西部等的一些同期植物群进行对比，对比结果表明与陕西山阳植物群最接近。此外。The fossil plants described and illustrated were collected from the Yangshan Formation in Shangcheng and Gushi districts of southeastern part of Henan Province,namely,Lepidodendron cf.aolungpylukense Sze,L.shanyangense Wu et He,L..cf.subrhombicum Gu et Zhi,L.sp.a,L.sp.b,Bothrodendron sp.a,B.sp.b,Lepidostrobus ? sp.,Stigmaria ficoides(Sternberg)Brongniart,Archaeocalamites scrobiculatus (Schlotheim) Seward,Cardiopteridium spetsbergense Nathorst,Triphyllopteris ? sp.,Rhodeopteridium hsianghsiangense (Sze) Zhang,Zhao et Wu,Paripteris cf.pseudogigantea(Potonié) Gothan,P.?sp.,Cordaites schenkii Halle,Cardiocarpus cordai (Geinitz) Gu et Zhi and Carpolithus sp.,including 18 species in 11 genera.They belonged to Lycopsida,Sphenopsida,Filices,Pteridospermopsida,Cordaitopsida and Semina Gymnospermarum respectively ,in which Lepidophytic plants of Lycopsida were the dominanance.The Yangshan Formation flora contains some typical Early Carboniferous elements,such as Archaeocalamites scrobiculatus,Cardiopteridium spetsbergense and Rhodeopteridium hsianghsiangense,which were fairly common from Visean to early Namurian;however,it also includes certain lepidophytic plants of the Cathaysian type,such as Lepidodendron cf.aolungpylukense,L.shanyangense and L.cf.subrhombicum,etc.On the basis of the floral composition,the geological age of the Yangshan Formation flora belonged to the late Early Carboniferous epoch,corresponding approximately to late Visean to early Namurian A.The present flora could be compared with contemporaneous floras from eastern Gansu,Shanyang of Shaanxi,South China and western Malaysia,which was closest to the Shanyang flora.In addition,the authors also discussed the distribution of late Early Carboniferous floras in other parts of the world.

关 键 词：早石炭世 杨山组 植物群 古植物学 

分 类 号：Q914.646[天文地球—古生物学与地层学]