Uppermost Permian Radiolaria from Southwestern China

The uppermost Permian radiolarian fauna of Southwestern China described here includes 11 genera and 17 species, of which 2 species are new. Preliminary geochemistry research indicates that the sediments yielding the fauna are with anoxic feature. This study contributes to a better understanding on the evolution of Permian radiolarias and the cause of end Permian radiolarian extinction.