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.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第5期474-484,共11页
Journal of Chengdu University of Technology: Science & Technology Edition
关键词
中泥盆世
金宝石植物群
形态特征
龙门山区
四川
Middle Devonian
plant fossils
morphological character
Jingbaoshi
Longmen Mountains
Sichuan
