Conodonts from the Lujuantun Formation Strata in Panshi Area,Jilin Province

The Lujuantun Formation has been listed as "Lower Carboniferous" since its founding.Some conodonts are found in four samples from the upper part of Lujuantun Formation in Mingcheng,Panshi area,Jilin Province.Among them,Idiognathoides corrugatus,Id.lanei,Id.sinuatus,Id.sulcatus,Idiognathodus sinuosus are representative species of the Early Pennylvanian.Moreover,the fact that both Idiognathodus and Streptognathodus originally appear indicates that the age of the upper part of the Lujuantun Formation approximately corresponds to the middle-late Bashkirian.