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《植物学报(英文版)》 1983-06
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ST ACHYOPHYTON GEN.NOV.DISCOVERS FROM LOWER DEVONIAN OF YUNNAN AND ITS SIGNIFICANCE

Geng Bao-yin (Institute of Botany,Academia Sinica)  
This paper describes a new plant——Stachyophyton yunnanense gen.et sp.nov.,from Posongchong Formation(Siegenian)of the Lower Devonian in Wenshan district,Yunnan, China. This plant shows some similar organization in fertile region and sterile parts in compa- rison with other Devonian genera(Protolepidodendron,Colpodexylon,Leclercqia,Enigmo- phyton,Krithodeophyton).It may be that the plant represents an intermediate stage in evo- lution between Enigmophyton and Krithodeophyton,and shows perhaps a certain affinity to lycopods.According to the salient features of Stachyophyton,it can not be,at present,pla- ced in any group known in vascular plant.It can be assigned to definite position of taxon basing on much fossils record and further studies.
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