Diversity of organic-walled microfossils from the early Mesoproterozoic Ruyang Group, North China Craton - A window into the early eukaryote evolution
文献类型：期刊论文
| 作者 | Agic, Heda; Moczydlowska, M (Moczydlowska, Malgorzata); Yin, LM (尹磊明） |
| 刊名 | Precambrian Research
 |
| 出版日期 | 2017 |
| 卷号 | 297页码:101-130 |
| 关键词 | Mesoproterozoic Ruyang Group Organic-walled microfossils Eukaryotic evolution North China Palaeobiodiversity |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2017.04.042 |
| 英文摘要 | Mesoproterozoic Era was an important time for initial diversification of eukaryotic clades and appearance of the earliest complex cell morphologies. Shales and siltstones of the Ruyang Group, Shanxi Province, North China Craton, record such diverse organic-walled microfossils, in addition to novel morphotypes. Recently, the depositional age of this succession has been constrained to 1744 22 to 1411 27 Ma via zircon U-Pb and Hf isotopic dating. This dating extended back the time of the first appearance of complex eukaryotic characters (e.g. processes, sculpture, layered wall structure) in the fossil record. We have conducted a biostratigraphic investigation of the samples throughout the fossiliferous Ruyang Group to provide an estimate of the relative early eukaryotic diversity in the Mesoproterozoic. Light- and scanning electron microscope observations have documented 26 species, including several that are reported for the first time, and some that were previously known only from younger, Neoproterozoic strata. Diversity was high in the upper Baicaoping Formation, declined in the middle and reached its peak in the upper Beidajian Formation. Novel morphologies among the unicellular Ruyang biota included a variety of processes, from tube-like extensions to hirsute spines, vesicles with velutinous outer membranes, as well as numerous specimens with internal bodies of varying sizes. We have also recorded the globally distributed Mesoproterozoic taxa Dictyosphaera and Tappania, and several morphotypes of Shuiyousphaeridium. Key characters displayed by the Ruyang biota are consistent with reproductive structures (especially cysts) like those among modern protists. These microfossils provided an additional evidence for the ongoing first radiation of Eukarya by at least 1400 Ma. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000404697200006 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/13451]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Agic, Heda |
| 推荐引用方式 GB/T 7714 | Agic, Heda,Moczydlowska, M ,Yin, LM . Diversity of organic-walled microfossils from the early Mesoproterozoic Ruyang Group, North China Craton - A window into the early eukaryote evolution[J]. Precambrian Research,2017,297:101-130. |
| APA | Agic, Heda,Moczydlowska, M ,&Yin, LM .(2017).Diversity of organic-walled microfossils from the early Mesoproterozoic Ruyang Group, North China Craton - A window into the early eukaryote evolution.Precambrian Research,297,101-130. |
| MLA | Agic, Heda,et al."Diversity of organic-walled microfossils from the early Mesoproterozoic Ruyang Group, North China Craton - A window into the early eukaryote evolution".Precambrian Research 297(2017):101-130. |
入库方式： OAI收割
来源：南京地质古生物研究所
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