Genus: Gladocephaloideus LÜ, JI, WEI, & LIU, 2012
Etymology: Latin, gladius, "sword" and Greek, kephale, "head"; referring to the skull is very long and narrow, like a sword.
Species: jingangshanensis LÜ, JI, WEI, & LIU, 2012
Etymology: After the fossil locality, Jingangshan, Yixian, western Liaoning, China.
Loocality: Jingangshan, Yixian, Liaoning Province, China.
Horizon: Jiangshangou Member, Yixian Formation, Jehol Group.
Age: Barremian Stage, Lower Gallic Subepoch, Middle Early Cretaceous Epoch, Early Cretaceous.
Material: Skull, anterior cervical vertebrae and part of lower limbs.
LÜ, KUNDRAT, & SHEN, 2016
Locality: Sihedang, Lingyuan County, Liaoning Province, China.
Horizon: Jiufotang Formation, Upper Jehol Group.
Biostratigraphy: Aptian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.
JPM 2014-004: Nearly complete skull and skeleton.