埃迪卡拉纪生物群在生命演化史上占有重要地位，尤其是在埃迪卡拉纪晚期出现了目前认为最古老的骨骼化化石生物群。这些化石记录为研究海洋生物在前寒武纪－寒武纪界线附近的转换过程提供了最直接的证据。我国上扬子区陕西省宁强县境内埃迪卡拉系上部灯影组碳酸盐岩中产出高分异度(管状、球状、瓶状、树枝状等)的微体化石生物群，对于解读寒武纪生命大爆发前夕埃迪卡拉纪晚期海洋生物的演化过程具有重要意义。但是，前人的研究尚处于摸索阶段，该套生物组合急需系统深入的研究。本项研究计划灵活使用"酸泡法"和"切片法"来从碳酸盐岩中分离化石个体或提取化石形态学信息，对宁强县境内的两个代表性剖面(高家山剖面和李家沟剖面)灯影组上部的碳酸盐岩地层开展详细的化石古生物学和古生态学研究。

Ediacaran biota marks an pivotal position in the evolution of life, especially the emergence of the currently proposed the oldest skeletonized metazoan in the late Ediacaran. The late Ediacaran fossil record would shed importatn insights into our understanding of biological transition at the Precambrian-Cambrian boundary. Edicaran carbonate sequence in the Ningqiang area (southern Shaanxi Province of South China) has yielded abundant diversified micro-fossils, including tubular, spherical, vase-shaped, and dendritic taxa. However, these biomineralized microfossisl is poorly studied. This study aim to conduct a detailed paleobiological and paleoecological investigation on these important fossils. Three-dimensionally phosphatized fossil materials will be isolated using acid-diagestion method, whereas those preserved through calcification will be thin-sectioned and microscopically studied. This study focuses on two representative sections (Gaojiashan and Lijiagou) of the Ediacaran Dengying Formation.