New Ediacara fossils preserved in marine limestone and their ecological implications.
New Ediacara fossils preserved in marine limestone and their ecological implications.
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海洋石灰岩中保存的新埃迪卡拉化石及其生态意义
DOI：
10.1038/srep04180
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发表时间：
2014-02-25
影响因子：
4.6
通讯作者：
Yuan X
中科院分区：
文献类型：
--
作者：
Chen Z;Zhou C;Xiao S;Wang W;Guan C;Hua H;Yuan X
埃迪卡拉化石是我们了解寒武纪大爆发前夕动物进化的核心，因为其中一些可能代表了茎群海洋动物。然而，一些标志性的埃迪卡拉化石也被解释为陆地地衣或微生物菌落。我们测试这些假设的能力受到地貌学偏见的限制，即大多数埃迪卡拉化石都保存在砂岩和粉砂岩中。本文报道了中国南方551-541马灯影组海相灰岩中几个标志性的埃迪卡拉化石和一个环状管状化石（重建为具有单列排列模块单元的直立底栖生物）。这些化石极大地扩展了几个关键埃迪卡拉分类群的生态范围，并支持它们是海洋生物而不是陆地地衣或微生物菌落。它们与丰富的双边洞穴密切相关，也表明它们可以忍受中等水平的生物扰动，并可能存活下来。
Ediacara fossils are central to our understanding of animal evolution on the eve of the Cambrian explosion, because some of them likely represent stem-group marine animals. However, some of the iconic Ediacara fossils have also been interpreted as terrestrial lichens or microbial colonies. Our ability to test these hypotheses is limited by a taphonomic bias that most Ediacara fossils are preserved in sandstones and siltstones. Here we report several iconic Ediacara fossils and an annulated tubular fossil (reconstructed as an erect epibenthic organism with uniserial arranged modular units), from marine limestone of the 551–541 Ma Dengying Formation in South China. These fossils significantly expand the ecological ranges of several key Ediacara taxa and support that they are marine organisms rather than terrestrial lichens or microbial colonies. Their close association with abundant bilaterian burrows also indicates that they could tolerate and may have survived moderate levels of bioturbation.
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影响因子：
56.9
作者：
Droser, Mary L.;Gehling, James G.
通讯作者：
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影响因子：
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作者：
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