Genus: Tylocephale MARYANSKA & OSMOLSKA, 1974
Etymology: Greek, tyle, “swelling on the skin” and Greek, kephale, “head”; in reference to the thickening of the skull roof.

Species: gilmorei MARYANSKA & OSMOLSKA, 1974
Etymology: In honor of Charles W. Gilmore, who first gave the detailed description of a pachycephalosaurid species.

Holotype: Z. Pal. No. MgD-I/105

Locality: Khulsan, Nemegt basin, Ömnögov (South Gobi), Mongolia.

Horizon: Barun Goyot Formation.

Biostratigraphy: Djadochtatherium catopsaloides KIELAN-JAWOROWSKA, Nemegtbaatar gobiensis KIELAN-JAWOROWSKA, and Chulsanbaatar vulgairs KIELAN-JAWOROWSKA Zone.

Age: Middle –Late Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Damaged skull with several maxillary teeth, lacking braincase, palate and anterior portion of snout, mandible with several mandibular teeth, lacking anterior portion of dentary, as well as articular and prearticular.

Tylocephale gilmorei (modified from MARYANSKA & OSMOLSKA, 1974), Holotype: Z. Pal. No. MgD-I/105.