The Liexi fauna: a new Lagerstätte from the Lower Ordovician of South China
The Liexi fauna: a new Lagerstätte from the Lower Ordovician of South China
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DOI：
10.1098/rspb.2022.1027
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发表时间：
2022-07
期刊：
影响因子：
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通讯作者：
X. Fang;Ying-yan Mao;QI Liu;W. Yuan;Zhongyang Chen;R. Wu;Lixia Li;Yuchen Zhang;Junye Ma;Wenhui Wang;Renbin Zhan;S. Peng;Yuandong Zhang;Diying Huang
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文献类型：
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作者：
X. Fang;Ying-yan Mao;QI Liu;W. Yuan;Zhongyang Chen;R. Wu;Lixia Li;Yuchen Zhang;Junye Ma;Wenhui Wang;Renbin Zhan;S. Peng;Yuandong Zhang;Diying Huang
在奥陶纪生物多样性大事件（GOBE）期间，奥陶纪Lagerstätten记录了大量保存完好的软体化石。然而，下奥陶统的Lagerstätten很少，其中大部分保存在限制环境和高纬度地区。本文报道了新近在湘西下奥陶统马道峪组碳酸盐岩地层中发现的热带列西Lagerstätte动物群。它含有各种软组织，以及丰富的贝壳化石，包括古石蠕虫，可能Ottoia，三叶虫，棘皮动物，海绵，笔石，多毛类，苔藓虫，牙形石和其他化石。动物群中既有寒武纪的遗迹，又有奥陶纪的起源，构成了一个复杂而完整的海洋生态系统。寒武纪遗迹与奥陶纪生物群的共存，揭示了寒武纪与古生代演化动物群之间的重要过渡。列西动物群的发现为认识奥陶纪的宏观演化和戈壁滩的形成提供了新的证据。
The Ordovician Lagerstätten record substantial amounts of excellent preservation and soft-bodied fossils during the Great Ordovician Biodiversification Event (GOBE). However, few Lagerstätten are known from the Lower Ordovician, most of which are preserved in restricted environments and high-latitude regions. Here, we report on a new tropical Lagerstätte, Liexi fauna, which has been recently discovered from a carbonate succession within the Lower Ordovician Madaoyu Formation in western Hunan, South China. It contains a variety of soft tissues, as well as rich shelly fossils, including palaeoscolecidan worms, possible Ottoia, trilobites, echinoderms, sponges, graptolites, polychaetes, bryozoans, conodonts and other fossils. The fauna includes taxa that are not only Cambrian relics, but also taxa originated during the Ordovician, constituting a complex and complete marine ecosystem. The coexistence of the Cambrian relics and Ordovician taxa reveals the critical transition between the Cambrian and Palaeozoic Evolutionary faunas. The unusual Liexi fauna provides new evidence for understanding Ordovician macroevolution and the onset of the GOBE.