Species: orientalis HWANG, NORELL & JI & GAO, 2004
Etymology: Latin, orientalis, "of or from the east."

Holotype: CAGS-IG02-301

Locality: Dabangou village, Sihetun area, near Beipiao City, Liaoning Province, China.

Horizon: Horizon 1, Lower part of the Yixian Formation, Jehol Group.

Biostratigraphy: Psittacosaurus Fauna, Confuciusornis Avifauna.

Age: Valanginian Stage, Upper Neocomian Subepoch, Early Early Cretaceous Epoch, Early Cretaceous.

Material : A nearly complete skeleton lacking only the distal end of the tail.
Note: As large as Beipiaosaurus.

Note: Has furcula.

Referred material:

JI-40: Cast.

 

Locality: Sihetun, western Liaoning Province, Northeastern China.

Horizon: Yixian Formation, third member, grey, grayish-black, grayish-white shale with light yellow sandstone, siltstone, silty mudstone and more than 10 layers of light yellow tuffite, tuffaceous sandstone and mudstone.

Biostratigraphy:

Age: Early Cretaceous.

Material:

NGMC 98-5-003: An almost complete poorly reconstructed and poorly prepared specimen.