龙门山区中泥盆世金宝石植物群  

THE MIDDLE DEVONIAN JINBAOSHI FLORA FROM LONGMEN MOUNTAINS, NORTHWEST OF SICHUAN

作　　者：王洪峰[1] 

机构地区：[1]成都理工大学地球科学学院,成都610059

出　　处：《成都理工大学学报（自然科学版）》2003年第5期474-484,共11页Journal of Chengdu University of Technology: Science & Technology Edition

摘　　要：首次系统地记述了四川西北龙门山区中泥盆世金宝石组植物化石,共计10属19种,其中包括3新种和1新比较种,它们分属于Psilophytopsida,Primofilices,Protolepido-dendrales,Lepidodendrales和Progymnospermopsida。根据植物化石的总体面貌以及紧邻其上覆和下伏地层中所产腕足类和牙形石类化石论证了金宝石植物群的时代,将其确定为中泥盆世吉维持早期(EarlyGivetian)。并讨论了金宝石植物群的发现在研究古地理、古植物地理分区、植物界的演化发展以及地层的划分、对比和时代确定等方面的重要意义。This paper describes the flora from the Middle Devonian Jinbaoshi Formation of Longmen Mountains in the northwest of Sichuan for the first time. The flora contains 19 species in 10 genera. They are Taeniocrada decheniana (Goepp.) Kr. et Weyl., Psilophyton bellum (Tschirkova) Dou, Psilophyton sp., Protopteridium minutum Halle, Protolepidodendron cf. scharyanum krejci, ?Colpodexylon sp., Cyclostigima sp., Lepidodendropsis cf. arborescens (Sze) Sze, Lepidodendropsis theodori (Zalessky) Jongmans, Lepidodendropsis cf. wutubulakensis Dou et Sun, Lepidodendropsis cf. hirmeri Lutz, Prelepidodendron jinbaoshiensis sp. nov., Prelepidodendron cf. jinbaoshiensis sp. nov., Prelepidodendron sichuanensis sp. nov., Prelepidodendron beichuanensis sp. nov., Prelepidodendron sp., Syringodendron (?Lepidosigillaria) sp.3, Syringodendron (?Lepidosigillaria) sp.4, ? Archaeopteris sp..The geologic age of the Jinbaoshi flora is inferred to be Early Givetian. This paper discusses the significance of the Jinbaoshi flora in paleogeography, geographical distribution of Paleophyte, evolution of plantae, stratigraphyic division and correlation.

关 键 词：中泥盆世 金宝石植物群 形态特征 龙门山区 四川 

分 类 号：Q914.2[天文地球—古生物学与地层学]