Genus: Cathayornis non ZHOU, et al, 1991

Species: aberransis HOU, ZHOU, ZHANG & GU, 2002
Etymology: In reference to the ancient name of China species name indicates abnormal features of this bird.

Holotype: IVPP V12353

Locality: Xidagou, Boluochi, Chaoyang City, Liaoning Province, China.

Horizon: Horizon IV, Jiufotang Formation, Upper Jehol Group.

Biostratigraphy: Psittacosaurus fauna, Cathayornis-Chaoyanga Avifauna.

Age: Barremian Stage, Lower Gallic Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary skull and fragmentary skeleton.

_____________________________________________________________________________________
Species: chabuensis LI, LI, ZHANG, ZHOU, BAI, ZHANG & BA, 2008
Etymology: The species name is derived from the locality Chabu.

Holotype: BMNHC-Ph00010 a, b

Locality: Chabu Sumu, western Inner Mongolia.

Horizon: Jingchuan Formation, Zhidan Group.

Biostratigraphy:

Age: Barremian-Aptian Stage, Gallic Subepoch, Lower Cretaceous Epoch, Early Cretaceous.

Material: Incomplete postcranial skeleton (part and counterpart) mainly preserved as bone fragments or impressions.

Referred material:

ZHANG, ZHANG, LI, & LI, 2010

OFMB-1: Sternum, furicula, rib, coracoid, scapula.