Species: quinquecuspidens HU, WANG, LUO & LI, 1997
Etymology: quinque, five (Latin); cuspis, point (Latin); dens, tooth (Latin),
for the three main cusps plus two large accessory cuspules on the lower molars.
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:
JI-4: Skull and skeleton with hair impressions.