Genus: Liaoxiornis HOU & CHEN, 1999
Etymology: Liaoxi, is Chinese Pinyin, which measn the western part of Liaoning Province, where the specimen was discovered.
= Lingyuanornis JI & JI, 1999
Etymology:

Species: delicatus HOU & CHEN, 1999
Etymology: Latin, for small.

Holotype: 130723

Locality: Dawangzhangzi (Daxinfanzi) bed, Lingyuan, Liaoning Province, China.

Horizon: Horizon II, Yixian Formation, Jehol Group.

Biostratigraphy: Psittacosaurus fauna, Liaoxiornis Avifauna.

Age: Lower Hautervian Stage, Uppermost Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: Nearly complete specimen.
Note: This adult (?) specimen is only 5 or 6 cm long!

= Lingyuanornis parvus JI & JI, 1999
Note: Part and counterpart specimens.

Referred material:

AZUMA, 2005

Locality: Western Liaoning Province, China.

Horizon: Yixian Formation, Jehol Group.

Biostratigraphy: Psittacosaurus Fauna, Confuciusornis Avifauna.

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

Material:

IG-24: Skull and skeleton with feather impressions.