Species: beishanensis HOU & ZHANG, 1993
Etymology: In reference to the Beishan Quarry, Chaoyang County, Liaoning Province, China, where the specimen was found.
Holotype: IVPP 9934
Locality: Beishan Quarry, Chaoyang County, Liaoning Province, China.
Horizon: Horizon IV, Jiufotang Formation, Upper Jehol Group.
Biostratigraphy: Pistacosaurus fauna, Cathayornis-Chaoyanga Avifauna.
Age: Barremian Stage, Lower Gallic Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.
Material: Incomplete skeleton lacking skull and forelimbs.
HOU, MARTIN, ZHOU & FEDUCCIA, 1996
Number: Not given: Partial foot, and shoulder girdle including the furcula, coracoids, and sternum.
Number: Not given: Fragmentary skull and fragmentary skeleton.