Species: hengdaoziensis JI, CHIAPPE & JI, 1999
Etymology: Hengdaozi referes to the stratigraphic horizon where it was collected.
Holotype: National Geological Museum of China collection, GMV 2129-a/b
Locality: Jianghsangou village (~25 km south of Beipiao City), western Laioning Province, northeastern China.
Horizon: Horizon 1, Lower part of the Yixian Formation, Jehol Group.
Note: Orginally Hengdaozi Member, Chaomidianzi Formation, a newly established unit formerly regarded as the lower part of the Yixian Formation.
Biostratigraphy: Psittacosaurus Fauna, Confuciusornis Avifauna.
Age: Valanginian Stage, Upper Neocomian Subepoch, Early Early Cretaceous Epoch, Early Cretaceous.
Material: Nearly complete specimen with feather impressions with 2 long tail feathers.
Changchengornis hengdaoziensis (modified from JI, CHIAPPE & JI, 1999), Holotype: GMV 2129-a/b.