| 贵州瓮安陡山沱期矿化生物群的研究进展和意义 |
| 修订日期：2001-07-05 |
| 关键词:Doushantuo Stage permineralized biota resting eggs embryo blastula gastrula |
| 基金项目:国家自然科学基金(49872002)，科学技术部“九五”专项(95专0133，G99A05a)，国家重点基础研究发展规划项目(G2000077700) |
|
| 摘要点击次数: 5578 |
| 全文下载次数: 5972 |
| 摘要: |
| Advances in the Study of Permineralized Biota of Doushantuo Stage in Weng'an, Guizhou Province and Their Geological Significance |
| In recent years, great importance has been attached to the study of permineralized (silicified and phosphatized) biota of the Doushantuo Stage in Weng'an, Guizhou Province, which provides an important opportunity of studying early stage evolution of metazoan including multicellular organisms. As some phosphatized spheroidal fossils preserved structures in different stages of cleavages, they were commonly interpreted as resting eggs and embryos of metazoan. Due to the shortage of trustworthy evidence of gastrula and hatching, their phylogenetic affinity remains a problem of long controversy. Based on new data of the phosphatized spheroidal fossils found in Doushantuo phosphorites in Weng'an, the authors found some phosphatized gastrula, colonial blue green algae, questionable sponge animal and vase shaped problematic fossils in addition to the reported resting eggs and embryos. It is obvious that the phosphatized spheroidal fossil assemblage found in Weng'an consists of cyanobacteria, benthic multicellular algae, planktonic acritarchs and other fossils with uncertain assignments, which seem to constitute an exceptionally well preserved phosphatized fossil Lagerst?tten. |
| YIN Chong-yu,GAO Lin-zhi,XING Yu-sheng.2002.Advances in the Study of Permineralized Biota of Doushantuo Stage in Weng'an, Guizhou Province and Their Geological Significance[J].Acta Geoscientica Sinica,23(1):47-54. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|