陕南寒武系宽川铺组具多级四分体细胞结构的微体化石  

MICROSCOPIC FOSSILS WITH MULTI-LEVEL TETRAD CELL STRUCTURES FROM THE CAMBRIAN KUANCHUANPU FORMATION IN SOUTHERN SHAANXI

作　　者：郑亚娟[1,2] 姚肖永 韩健[3,2] 郭俊锋[1,2] 

机构地区：[1]长安大学地球科学与资源学院,西安710054 [2]陕西省早期生命与环境重点实验室(西北大学),西安710069 [3]西北大学地质系及大陆动力学国家重点实验室,西安710069

出　　处：《古生物学报》2017年第4期440-448,共9页Acta Palaeontologica Sinica

基　　金：国家自然科学基金(Nos.:41472015;41672009;41621003;417720104002);中央高校基金(No.310827171013)资助

摘　　要：我国华南扬子板块埃迪卡拉纪—寒武纪的含磷地层中产有丰富的呈现分裂特征的多细胞球状化石。由于有效信息的缺乏,长期以来,这些球状化石的生物属性及分类存在争议。我们在陕南寒武系宽川铺组获得的一些保存精美的分裂型球状化石,具有明显的多级四分体结构,通过与同层位产出的动物卵裂期胚胎化石、瓮安生物群中四分体结构的藻类化石对比,结果表明这些分裂球形化石很可能为多细胞藻类。A large number of multieellular spherical microfossils occur in the phosphorus-bearing strata from the Ediacaran-Cambrian in South China, in which some of the large multicellular spherical fossils are characterized by cell cleavage. The affinity and classification of these spherical fossils have been controversial for a long time due to thelack of effective anatomical information. Here we report exceptional spherical and non-spherical fossils characterized by specific multi-level, tetrad cell structures from the Kuanchuanpu Formation in southern Shaanxi. These spherical fossils are likely akin to multicellular algae in comparison with co- occurred animal embryos in the cleavage stage and algal fossils with tetrad structures from the Ediacaran Weng＇an biota in South China.

关 键 词：藻类化石 球状化石 四分体 宽川铺生物群 

分 类 号：Q913.2[天文地球—古生物学与地层学]