This work was supported by National Natural Science Foundation of China(Grant No.30430100);Beijing Municipal Commission of Education(Grant No.KZ200410028013);the Beijing Natural Science Foundation(Grant No.5032003);PHR Project of Beijing Municipal Commission of Education and the financial support from China Postdoctoral Science Foundation(Grant No.20060400479).
Two fossil dragonflies from the Upper Jurassic to Lower Cretaceous Yixian Formation in Liutiaogou Village,Ningcheng County, Inner Mongolia,China are described and illustrated.They are assigned to two new genera and sp...