globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12148
Scopus记录号: 2-s2.0-84944152864
论文题名:
Early evolution of large micro-organisms with cytological complexity revealed by microanalyses of 3.4 Ga organic-walled microfossils
作者: Sugitani K.; Mimura K.; Takeuchi M.; Lepot K.; Ito S.; Javaux E.J.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2015
卷: 13, 期:6
起始页码: 507
结束页码: 521
语种: 英语
Scopus关键词: cytology ; evolution ; extraction method ; greenstone belt ; microfossil ; palynology ; shallow water ; stromatolite ; terrane ; ultrastructure ; Australia ; Pilbara Block ; Western Australia ; analysis ; evolution ; fossil ; scanning electron microscopy ; sediment ; transmission electron microscopy ; ultrastructure ; Western Australia ; Biological Evolution ; Fossils ; Geologic Sediments ; Microscopy, Electron, Scanning ; Microscopy, Electron, Transmission ; Western Australia
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: The Strelley Pool Formation (SPF) is widely distributed in the East Pilbara Terrane (EPT) of the Pilbara Craton, Western Australia, and represents a Paleoarchean shallow-water to subaerial environment. It was deposited ~3.4 billion years ago and displays well-documented carbonate stromatolites. Diverse putative microfossils (SPF microfossils) were recently reported from several localities in the East Strelley, Panorama, Warralong, and Goldsworthy greenstone belts. Thus, the SPF provides unparalleled opportunities to gain insights into a shallow-water to subaerial ecosystem on the early Earth. Our new micro- to nanoscale ultrastructural and microchemical studies of the SPF microfossils show that large (20-70 μm) lenticular organic-walled flanged microfossils retain their structural integrity, morphology, and chain-like arrangements after acid (HF-HCl) extraction (palynology). Scanning and transmitted electron microscopy of extracted microfossils revealed that the central lenticular body is either alveolar or hollow, and the wall is continuous with the surrounding smooth to reticulated discoidal flange. These features demonstrate the evolution of large micro-organisms able to form an acid-resistant recalcitrant envelope or cell wall with complex morphology and to form colonial chains in the Paleoarchean era. This study provides evidence of the evolution of very early and remarkable biological innovations, well before the presumed late emergence of complex cells. © 2015 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85126
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作者单位: Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Australian Centre for Astrobiology, University of New South Wales, Sydney, NSW, Australia; Laboratoire d'Océanologie et de Géosciences, Université de Lille, CNRS UMR8187, Villeneuve d'Ascq, France; School of Informatics and Sciences, Nagoya University, Nagoya, Japan; Department of Geology, University of Liège, Liège, Belgium; Japan Finance Corporation, Tokyo, Japan

Recommended Citation:
Sugitani K.,Mimura K.,Takeuchi M.,et al. Early evolution of large micro-organisms with cytological complexity revealed by microanalyses of 3.4 Ga organic-walled microfossils[J]. Geobiology,2015-01-01,13(6)
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