贵州埃迪卡拉系–寒武系留茶坡组中球形化石的研究  

Study of the Spherical Fossils from the Ediacaran-Cambrian Liuchapo Formation in Guizhou,China

作　　者：刘晖 董琳 LIU Hui;DONG Lin(Key Laboratory of Orogenic Belts and Crustal Evolution(MOE),School of Earth and Space Sciences,Peking University,Beijing 100871)

机构地区：[1]造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京100871

出　　处：《北京大学学报（自然科学版）》2023年第3期427-433,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金(41402025);中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室基金(133103)资助。

摘　　要：对贵州省东部坝黄剖面留茶坡组硅质岩中的微体化石进行研究。通过薄片观察,发现多种球形化石,包括一类具连接体的球形化石以及两种具深色外壁的球形化石。对具连接体的球形化石进行系统的描述,并建立新属Bahuangia gen.nov.。Bahuangia的连接体呈葫芦状或链状,形态可与出芽生殖的单细胞真菌或细菌进行类比。所报道的3类球形化石在扬子板块埃迪卡拉纪晚期的深水相地层中广泛分布,此次发现加深了对埃迪卡拉纪晚期深水区生物面貌的认识,可为区域地层对比以及地球早期生命演化的研究提供新的材料。Microfossils from cherts of the Liuchapo Formation at Bahuang section in eastern Guizhou Province were studied.Through thin section observation,a large number of spherical fossils were revealed,including one type with connected spheroids,and two types with dark outer wall.The former is systematically described,and a new genus Bahuangia gen.nov.is established.The connected bodies of Bahuangia are calabash-or chain-shaped,and resemble the budding unicellular fungi or bacteria in morphology.Spherical fossils similar to these Bahuang specimens are widely distributed in the late Ediacaran deep-water facies of the Yangtze Plate.Through this study,the understanding of deep-water life forms during the ECT is improved,and new materials for both regional stra-tigraphic correlation and early life evolution are provided.

关 键 词：球形化石 硅质岩 留茶坡组 贵州 

分 类 号：Q911.2[天文地球—古生物学与地层学] P534.41[生物学—古生物学]