Dinosaurs · Pachycephalosaur

Tylocephale

Say it tie-loh-keff-ah-lee. The name means ‘swelling head’.

Tylocephale beside a person 1.75 m tall. Ticks mark every metre.Body shape drawn for this site, showing the general build of pachycephalosaurs

Length: 1.4 m
Diet: Plant-eater
When: Late Cretaceous75 to 72 million years ago
Fossils found in: Mongolia
Named by: Maryańska and Osmólska (1974)
Family tree: Dinosauria › Ornithischia › Neornithischia › Cerapoda › Marginocephalia › Pachycephalosauria › Pachycephalosauridae

Where Tylocephale sits in the age of dinosaurs.Periods from the ICS chart; dinosaur dates from the Natural History Museum

Pachycephalosaurs. Two-legged plant-eaters with thick, domed skulls. See all 8

Lived at the same time

Alectrosaurus · same country
Anserimimus · same country
Borogovia · same country
Microceratus · same country
Mononykus · same country
Prenocephale · same country
Tarchia · same country
Protoceratops · same country

Other pachycephalosaurs

Stegoceras Late Cretaceous
Homalocephale Late Cretaceous
Prenocephale Late Cretaceous
Goyocephale Late Cretaceous
Pachycephalosaurus Late Cretaceous
Stygimoloch Late Cretaceous
Dracorex Late Cretaceous

Source: Tylocephale in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.