Complex embryos displaying bilaterian characters from precambrian doushantuo phosphate deposits, weng'an, guizhou, china
文献类型：期刊论文
| 作者 | Chen, Jun-Yuan1,2; Bottjer, David J.3; Li, Gang4; Hadfield, Michael G.5; Gao, Feng6; Cameron, Andrew R.6; Zhang, Chen-Yu1,2; Xian, Ding-Chang4; Tafforeau, Paul7; Liao, Xin1,2 |
| 刊名 | Proceedings of the national academy of sciences of the united states of america
 |
| 出版日期 | 2009-11-10 |
| 卷号 | 106期号:45页码:19056-19060 |
| 关键词 | Early animal evolution Early metazoan evolution Nondestructive 3-d reconstruction Precambrian ediacaran embryos Weng'an biota |
| ISSN号 | 0027-8424 |
| DOI | 10.1073/pnas.0904805106 |
| 通讯作者 | Chen, jun-yuan(chenjunyuan@163.net) |
| 英文摘要 | Three-dimensionally preserved embryos from the precambrian ediacaran doushantuo formation, weng'an, guizhou, southern china, have attracted great attention as the oldest fossil evidence yet found for multicellular animal life on earth. many embryos are early cleavage embryos and most of them yield a limited phylogenetic signal. here we report the discovery of two doushantuo embryos that are three-dimensionally preserved and complex. imaging techniques using propagation phase-contrast based synchrotron radiation microtomography (ppc-sr-mu ct) reveal that the organization of cells demonstrates several bilaterian features, including the formation of anterior-posterior, dorso-ventral, and right-left polarities, and cell differentiation. unexpectedly, our observations show a noticeable difference in organization patterns between the embryos, suggesting that they represent two distinct taxa. these embryos provide further evidence for the presence of bilaterian animals in the doushantuo biota. furthermore, these bilaterians had already diverged into distantly related groups at least 40 million years before the cambrian radiation, indicating that the last common ancestor of the bilaterians lived much earlier than is usually thought. |
| WOS关键词 | ANIMAL EMBRYOS ; SOUTH CHINA ; FOSSILS ; MICROTOMOGRAPHY ; PHOSPHORITES ; CONSTRAINTS ; EVOLUTION |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000271637500034 |
| 出版者 | NATL ACAD SCIENCES |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2175920 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Chen, Jun-Yuan |
| 作者单位 | 1.Nanjing Univ, Inst Evo Dev Biol, LPS Nanjing Inst Geol & Paleontol, Nanjing 210093, Peoples R China 2.Nanjing Univ, State Key Lab Pharmaceut Biotechnol, Nanjing 210093, Peoples R China 3.Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA 4.Inst High Energy Phys, Beijing 100049, Peoples R China 5.Univ Hawaii Manoa, Kewalo Marine Lab, Honolulu, HI 96813 USA 6.CALTECH, Div Biol, Pasadena, CA 91125 USA 7.European Synchrotron Radiat Facil, F-38043 Grenoble, France |
| 推荐引用方式 GB/T 7714 | Chen, Jun-Yuan,Bottjer, David J.,Li, Gang,et al. Complex embryos displaying bilaterian characters from precambrian doushantuo phosphate deposits, weng'an, guizhou, china[J]. Proceedings of the national academy of sciences of the united states of america,2009,106(45):19056-19060. |
| APA | Chen, Jun-Yuan.,Bottjer, David J..,Li, Gang.,Hadfield, Michael G..,Gao, Feng.,...&Yin, Zong-Jun.(2009).Complex embryos displaying bilaterian characters from precambrian doushantuo phosphate deposits, weng'an, guizhou, china.Proceedings of the national academy of sciences of the united states of america,106(45),19056-19060. |
| MLA | Chen, Jun-Yuan,et al."Complex embryos displaying bilaterian characters from precambrian doushantuo phosphate deposits, weng'an, guizhou, china".Proceedings of the national academy of sciences of the united states of america 106.45(2009):19056-19060. |
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