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.

Holotype: IG-CAGS-08-07

Loocality: Jingangshan, Yixian, Liaoning Province, China.

Horizon: Jiangshangou Member, Yixian Formation, Jehol Group.

Biostratigraphy:

Age: Barremian Stage, Lower Gallic Subepoch, Middle Early Cretaceous Epoch, Early Cretaceous.

Material: Skull, anterior cervical vertebrae and part of lower limbs.

Referred material:

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.

Material:

JPM 2014-004: Nearly complete skull and skeleton.