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文章简要报道湖北中部京山县郊发现的一个布尔吉斯页岩型生物群,该生物群由大量三叶虫、腕足类、软舌螺及少量鳃曳动物、双瓣壳节肢动物、非三叶虫节肢动物和棘皮动物等组成。文中重点描述非三叶虫节肢动物Clypecaris?和棘皮动物Sinoeocrinus,两者分别为澄江动物群和凯里生物群的典型分子。依据生物地层学证据,该生物群的时代大致为寒武纪第四期晚期(龙王庙期),与凯里生物群下部组合基本相当,稍晚于云南东部的关山动物群和峡东地区石牌组的布尔吉斯页岩型生物群。该发现进一步丰富了华中地区早-中寒武世化石库的资料,扩大了布尔吉斯页岩型生物群的地理分布,并是目前已知唯一的分布在扬子地台北缘的该类型生物群,这对寒武纪环扬子地台古生态的重建和多门类后生生物的演化都将提供重要资料。
The paper briefly reports on a Burghis shale-type biota found in the suburb of Jingshan in the central part of Hubei Province. The biota consists of a large number of trilobites, brachiopods, soft lingual snails and a small number of gill thrips, two-lobed arthropods, Insect arthropods and echinoderms and other components. In this paper, the non-trilobite arthropod Clypecaris? And the echinoderm Sinoeocrinus are mainly described, which are typical molecules of Chengjiang fauna and Carey biota, respectively. Based on biostratigraphic evidence, the age of this biota is roughly the late Cambrian fourth phase (Longwangmiao period), which is basically equivalent to the lower part of the Kaili Group and later to the Guanshan Group and the Gorge Region in eastern Yunnan Lichen Shale-type biota. The discovery further enriches the data of the Early-Middle Cambrian fossil reservoir in Central China and expands the geographical distribution of the Burqis shale-type biota. It is the only biota known to have been located in the northern margin of the Yangtze platform , Which will provide important information for the reconstruction of ancient ecology and the evolution of many kinds of epigenetic organisms in the Yangtze Yangtze platform.