Species: pachyostosus REYNOSO, 2000
Holotype: IGM 7441
Locality: Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.
Horizon: Middle member of the Tlayua Formation.
Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.
Material: Fragmentary skull and fragmentary skeleton.
IGM 7443, 7442, 7445: Fragmentary skull and fragmentary skeleton.
IGM 7446, 7447: Fragmentary skeletons.