尚晓冬,刘鹏举

• 1:中国地质科学院地质研究所
• 2:自然资源部地层与古生物重点实验室

摘要(Abstract)：

本文首次报道并描述湖南张家界地区田坪剖面埃迪卡拉系陡山沱组下部燧石条带中发现的疑源类微体化石,经系统鉴定共5属6种和1个不定属种,包括Appendisphaera grandis,A.tenuis,Cavaspina acuminata,Megasphaera inornata,Mengeosphaera gracilis,Tanarium tuberosum,Acritarcha gen.et sp.indet.。新的化石材料扩大了华南埃迪卡拉纪早期微体生物群的分布范围,这些疑源类属种在分类学上同华南地区及全球其他埃迪卡拉纪微体化石组合相似,为生物地层学研究提供了更多的古生物数据。虽然所发现的化石属种数量较为有限,同其他地区的精确生物地层对比关系尚不能建立,但由于包含Tanarium tuberosum,故将当前的生物组合与Tanarium tuberosum-Schizofusa zangwenlongii组合带相对比。此外,在Tanarium tuberosum膜壳内发现许多大小一致的球状内含物,可能是其生殖阶段的子细胞,为研究埃迪卡拉纪具刺疑源类的生物亲缘关系提供了新的化石证据。

关键词(KeyWords)： 陡山沱组;埃迪卡拉纪;疑源类;生物地层;田坪;湖南

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(41872024、41902019);; 中国博士后科学基金(2019M660742);; 中国地质调查局项目(DD20190008);; 中国科学院战略性先导科技专项(B类)(XDB 26000000)共同资助

作者(Author): 尚晓冬,刘鹏举

DOI: 10.19839/j.cnki.dcxzz.2020.0023

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