Genus: Houornis WANG & LIU, 2015
Etymology: In honor of Dr. Hou Lianhai for his contribution to the research of Mesozoic birds of China and Greek, ornis, "bird."

Species: caudatus (HOU, 1997) WANG & LIU, 2015
= Cathayornis caudatus HOU, 1997
Etymology: Latin, caudatus, "tail."

Holotype: IVPP 10917

Locality: 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.

Referred material:

IVPP 10533: Fragmentary skeleton.

IVPP 10904: Fragmentary skeleton.