Abstract

The carbonaceous macrofossils which belong to multicellular algae and which were previously known from the younger (>570 Ma) Miaohe biota are found for the first time in the Lower Vendian (Middle Ediacaran, ~580 Ma) rocks of the Ura Formation of the Patom Basin in Siberia. The Ura macrofossils include phytoleims of unbranched ribbon-like thalli preserved on the surfaces of silty mudstones. Among the fossils, the species Liulingjitaenia alloplecta and Jiuqunaoella simplicis are identified. The features of their structure are considered. The in vivo forms of the organisms and their colonies are interpreted. It is shown that these organic macrofossils were a noticeable detritus-forming component of the Ura Basin. The Ura macrophytes coexisted with the Early Ediacaran microbiota and composed a common ecosystem of the paleobasin, which formed shortly before the Shuram event and was significantly transformed after it.

中文翻译：

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来自西伯利亚帕托姆高地埃迪卡拉（文迪）前舒拉姆地层的妙河生物群代表

摘要

在帕托姆盆地 Ura 组的下文德 (Middle Ediacaran, ~580 Ma) 岩石中首次发现了属于多细胞藻类的碳质大型化石，这些化石是以前从较年轻的 (>570 Ma) 庙河生物群中发现的在西伯利亚。Ura 大型化石包括保存在粉质泥岩表面的不分枝的带状菌体的植物体。在这些化石中，有六灵鸡带菌属和九曲脑菌属被识别。考虑了它们的结构特征。解释了生物体及其菌落的体内形式。结果表明，这些有机大化石是 Ura 盆地的一个明显的碎屑形成成分。Ura 大型植物与早期埃迪卡拉纪微生物群共存，构成了古盆地的共同生态系统，该生态系统在 Shuram 事件前不久形成并在其后发生了显着变化。