J Integr Plant Biol. ›› 1981, Vol. 23 ›› Issue (5): -.

• Research Articles •    

A New Cycad -Primocycas chinensis gen. et sp. Nov. Discovers from the Lower Permian in Sha-nxi, China and Its Significence

Zhu Jia-nan and Du Xian-ming   

Abstract: This paper described a new cycad which from the Lower Shihezi Formation in Shanxi China. These new materials described here belong to a kind of macrosporophyll of cycad. At the same time, a great part of those specimens of Norinia cuculata must be divided into the present new genus. As far as the age of geology was concerned that the Halle's specimens were younger than present ones. Based on the different characters of the present specimens and the Halle’s ones, both of them have been named Primocycas chinensis, gen. et sp. nov. and P. muscariformis, sp. nov. separately by authors. The new cycad here has been compared with others permian cycad macrosporophyll, such as Phasmatocycas kansana and Archaeocycas whitei. According to the small resinoid spherules bearing between those lateral veins of both Phasmatocycas kansana and Taeniopteris multinervis, it seems to authors that the relationship between them is more close. Fineral, authors regard the genus Samaropsis as the seed of cycad based on the specimens of the new one.

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