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DOI | 10.1073/pnas.2001045117 |
Discovery of the oldest bilaterian from the Ediacaran of South Australia | |
Evans, Scott D.1,4; Hughes, Ian V.2; Gehling, James G.3; Droser, Mary L.1 | |
2020-04-07 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:14页码:7845-7850 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Australia |
英文摘要 | Analysis of modern animals and Ediacaran trace fossils predicts that the oldest bilaterians were simple and small. Such organisms would be difficult to recognize in the fossil record, but should have been part of the Ediacara Biota, the earliest preserved macroscopic, complex animal communities. Here, we describe Ikaria wariootia gen. et sp. nov. from the Ediacara Member, South Australia, a small, simple organism with anterior/posterior differentiation. We find that the size and morphology of Ikaria match predictions for the progenitor of the trace fossil Helminthoidichnites-indicative of mobility and sediment displacement. In the Ediacara Member, Helminthoidichnites occurs stratigraphically below classic Ediacara body fossils. Together, these suggest that Ikaria represents one of the oldest total group bilaterians identified from South Australia, with little deviation from the characters predicted for their last common ancestor. Further, these trace fossils persist into the Phanerozoic, providing a critical link between Ediacaran and Cambrian animals. |
英文关键词 | bilaterian Ediacaran Ediacara Biota phylogenetics trace fossil |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000524486300046 |
WOS关键词 | RAWNSLEY QUARTZITE ; GRAZING BEHAVIOR ; EVOLUTION ; BIOTA ; BODY ; ASSEMBLAGE ; ANCESTRY ; PATTERNS ; BURROWS ; MEMBER |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249560 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA; 2.Univ Calif San Diego, Div Biol Sci, Sect Ecol Behav & Evolut, La Jolla, CA 92093 USA; 3.South Australia Museum, Dept Palaeontol, Adelaide, SA 5000, Australia; 4.Smithsonian Inst, Dept Paleobiol, Washington, DC 20560 USA |
推荐引用方式 GB/T 7714 | Evans, Scott D.,Hughes, Ian V.,Gehling, James G.,et al. Discovery of the oldest bilaterian from the Ediacaran of South Australia[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(14):7845-7850. |
APA | Evans, Scott D.,Hughes, Ian V.,Gehling, James G.,&Droser, Mary L..(2020).Discovery of the oldest bilaterian from the Ediacaran of South Australia.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(14),7845-7850. |
MLA | Evans, Scott D.,et al."Discovery of the oldest bilaterian from the Ediacaran of South Australia".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.14(2020):7845-7850. |
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