Species: yandica ZHOU, JIN & ZHANG, 1992
Etymology: From Yandu, the old name of Chaoyang where the bird was found.

Holotype: IVPP V9169A, B

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: Skull and fragmentary skeleton.

Modified from ZHOU, JIN & ZHANG, 1992, IVPP V9169A, B

Referred material:

MARTIN & ZHOU, 1993

IVPP V10896, V10916: Skulls and skeletons.

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