The weng'an biota and the ediacaran radiation of multicellular eukaryotes
文献类型：期刊论文
| 作者 | Xiao, Shuhai1; Muscente, A. D.1; Chen, Lei2,3; Zhou, Chuanming4; Schiffbauer, James D.5; Wood, Andrew D.6; Polys, Nicholas F.6; Yuan, Xunlai2 |
| 刊名 | National science review
 |
| 出版日期 | 2014-12-01 |
| 卷号 | 1期号:4页码:498-520 |
| ISSN号 | 2095-5138 |
| 关键词 | Ediacaran period Doushantuo formation Weng'an biota Multicellularity Eukaryotes Animals Algae |
| DOI | 10.1093/nsr/nwu061 |
| 通讯作者 | Xiao, shuhai(xiao@vt.edu) |
| 英文摘要 | The rise of multicellularity represents a major evolutionary transition and it occurred independently in multiple eukaryote clades. although simple multicellular organisms may have evolved in the mesoproterozoic era or even earlier, complex multicellular eukaryotes began to diversify only in the ediacaran period, just before the cambrian explosion. thus, the ediacaran fossil record can provide key paleontological evidence about the early radiation of multicellular eukaryotes that ultimately culminated in the cambrian explosion. the ediacaran weng'an biota in south china hosts exceptionally preserved eukaryote fossils, including various acanthomorphic acritarchs, pseudoparenchymatous thalli, tubular microfossils, and spheroidal fossils such as megasphaera, helicoforamina, spiralicellula, and caveasphaera. many of these fossils have been interpreted as multicellular eukaryotes, although alternative interpretations have also been proposed. in this review, we critically examine these various interpretations, focusing particularly on megasphaera, which has been variously interpreted as a sulfur-oxidizing bacterium, a unicellular protist, a mesomycetozoean-like holozoan, a volvocine green alga, a stem-group animal, or a crown-group animal. we conclude that megasphaera is a multicellular eukaryote with evidence for cell-to-cell adhesion, a flexible membrane unconstrained by a rigid cell wall, spatial cellular differentiation, germ-soma separation, and programmed cell death. these features are inconsistent with the bacterium, unicellular protist, and mesomycetozoean-like holozoan interpretations. thus, the surviving hypotheses, particularly the stem-group animal and algal interpretations, should be further tested with additional evidence. the weng'an biota also hosts cellularly differentiated pseudoparenchymatous thalli with specialized reproductive structures indicative of an affinity with florideophyte red algae. the other weng'an fossils reviewed here may also be multicellular eukaryotes, although direct cellular evidence is lacking in some and phylogenetic affinities are poorly constrained in others. the weng'an biota offers many research opportunities to resolve the life histories and phylogenetic diversity of early multicellular eukaryotes and to illuminate the evolutionary prelude to the cambrian explosion. |
| WOS关键词 | NEOPROTEROZOIC DOUSHANTUO FORMATION ; PRECAMBRIAN ANIMAL LIFE ; GIANT SULFUR BACTERIA ; YANGTZE GORGES AREA ; SOUTH CHINA ; GUIZHOU PROVINCE ; RED ALGAE ; ACANTHOMORPHIC ACRITARCHS ; GAOJIASHAN LAGERSTATTE ; EXPERIMENTAL TAPHONOMY |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000356860000015 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376421 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xiao, Shuhai |
| 作者单位 | 1.Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA 2.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Jiangsu, Peoples R China 5.Univ Missouri, Dept Geol Sci, Columbia, MO 65211 USA 6.Virginia Polytech Inst & State Univ, Adv Res Comp, Blacksburg, VA 24061 USA |
| 推荐引用方式 GB/T 7714 | Xiao, Shuhai,Muscente, A. D.,Chen, Lei,et al. The weng'an biota and the ediacaran radiation of multicellular eukaryotes[J]. National science review,2014,1(4):498-520. |
| APA | Xiao, Shuhai.,Muscente, A. D..,Chen, Lei.,Zhou, Chuanming.,Schiffbauer, James D..,...&Yuan, Xunlai.(2014).The weng'an biota and the ediacaran radiation of multicellular eukaryotes.National science review,1(4),498-520. |
| MLA | Xiao, Shuhai,et al."The weng'an biota and the ediacaran radiation of multicellular eukaryotes".National science review 1.4(2014):498-520. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。