湖北鹤峰白果坪水井沱组（早寒武世）燧石中微化石新资料

NEW DATA OF MICROFOSSILS FROM THE SHUIJINGTUO FORMATION (LOWER CAMBRIAN) IN HEFENG, HUBEI PROVINCE

湖北省鹤峰白果坪剖面下寒武统水井沱组底部黑色燧石的岩石薄片中，发现有丰富的保存完好的微化石，包括球形藻、刺球藻、丝状藻类及一些分类不明的微化石。经初步研究计有６属９种类型。其中包括１新属Ｓｐｉｃｉｆｏｒｍａｇｅｎ．ｎｏｖ．和２个新种Ｓｐｉｃｉｆｏｒｍａａｇｇｌｏｍｅｒａｔａｇｅｎ，ｅｔｓｐ．ｎｏｖ．和？Ｒｅｔｉｎａｒｉｔｅｓｓｐｉｒａｌｉｓｓｐ．ｎｏｖ．。这一发现进一步丰富了早寒武世早期硅质岩相地层的微体化石资料，为相关地层的对比提供了可资参考的古生物学依据。

The microfossils described and illustrated in this paper were discovered in the black chert of the lower Cambrian Shuijingtuo Formation at Baiguoping, Hefeng, Hubei Province. All of them have been observed in petrographic thin-sections,with 6 genera and 9 species (including Spiciforma agglomerata gen. et sp. nov. and ?Retinarites spiralis sp. nov. ). This microfossil assemblage provides important data for making correlations with the SinianCambrian boundary strata of the adjacent areas.