First discovery of Mesozoic bird fossils in Hebei province and its significance

Bird fossils were for the first time discovered in the bottom of the Jurassic Yixian Formation in the north of Fengning county,Hebei.Study of the fossils indicates that the bird is most close to Archaeopterx ,but more developed than the latter.It is significantly different from neo bird subclass.It is classified as a new species of palaeobird subclass,and named as Fengninghebei Bird.