The species diversity of fusulinaceans and high-frequency sea-level changes in the Carboniferous-Permian boundary section at Xikou, Zhen’an County, Shaanxi Province, China

Fossil is a direct record of origin, development, de-cline, and extinction of living things. Utilizing fossil record to study biodiversity and its evolution in geo-logical history is one of the basic goals of paleontol-ogy[1]. Since the last decades, the study on biodiversity and mass extinction has become an international “hot-spot” issue in paleontology field through estab-lishing the global databases of marine invertebrate, drawing the curve of the biodiversity, and discovering the mass e…