Sponge Spicule Fossils from the Jiumenchong and Zhalagou Formations (Cambrian) of
详细信息
- 责任者：Yang Xinglian (College of Resource and Environment ; Guizhou University ; Guiyang 5500032 ; China) ; Zhao Yuanlong
- 刊名：Acta Micropalaeontologica Sinica
- 出版年：2010
- 卷期：27(3)
- 关键词：玻璃海绵纲 ; Hyalospongea ; 普通海绵纲 ; Demospongea ; 海绵针 ; spicules ; 贵州 ; Guizhou Province
- 页码：p.243-252
- 图表：2 illus., 2 paltes, 1 table, 49 refs.
- 分类号：1103
- issnNo：ISSN1000-0674
- isbnNo：CN32-1189/Q
摘要
Sponge spicules from the deep water facies Jiumenchong and Zhalagou formations of the early Cambrian of Guizhou are mainly consisted of monaxons with subradiates,acanthostauractines,acerose hexactines,acerose acanthohexactines,acerose acanthohexactines,stubby hexactines,pentactines,and clinopentactines. Except for the mona-xons spicules that belong to demosponge,all the other spicule types belong to the hexactinellid. The diversity and abundance are significantly lower than those of the Qiongzhusi Formation of Zhenping and the Xihaoping Member (of the upper part of Dengying Formation) and Shuijingtuo Formation of Zhenba,Shaanxi Province. Furthermore,demosponge spicules such as orthopolyactines,orthopolyaenes,triaenes and other types found in the Zhenba region belonging to shallow-water facies and are not found in the deeper water facies of the Jiumenchong and Zhalagou formations of Guizhou. It may be indicated that compositions of sponge spicules assemblages are controlled by water depth.
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