| Diet | Herbivore |
| Height | 1.2m |
| Length | 2.5m |
| Weight | 78 kg |
| Speed | 25 km/h |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Pachycephalosaur |
| Location | North America |
Stegoceras was a fascinating pachycephalosaur dinosaur that roamed the forests of North America during the Late Cretaceous period, approximately 77.5 to 74 million years ago. This dome-headed herbivore was relatively small compared to many other dinosaurs, measuring about 2.5 metres in length and standing roughly 1.2 metres tall at the hip, weighing around 78 kilograms.
The most distinctive feature of Stegoceras was its thick, bony skull dome, which could be up to 8 centimetres thick in adult specimens. This remarkable dome was surrounded by small spikes and bumps, giving the creature's head a formidable appearance. Unlike some of its pachycephalosaur relatives with extremely high domes, Stegoceras had a more modest, rounded skull cap that was still quite impressive.
As a herbivore, Stegoceras fed on low-growing plants, ferns, and possibly fruits using its small, leaf-shaped teeth that were well-suited for processing plant material. Its bipedal stance and relatively long legs suggest it was quite agile and could reach speeds of up to 25 kilometres per hour when necessary, perhaps to escape predators or during social interactions.
Stegoceras lived in the lush, warm forests that covered much of western North America during the Late Cretaceous. The climate was much warmer than today, with no polar ice caps, creating ideal conditions for the diverse plant life that sustained these remarkable dome-headed dinosaurs.
Stegoceras is immediately recognisable by its thick, rounded skull dome surrounded by small spikes and bumps. Unlike some pachycephalosaurs with towering domes, Stegoceras had a more moderate but still prominent bony cap on its head that could reach 8 centimetres in thickness.
Stegoceras likely lived in small herds and may have used its skull dome for head-butting contests during mating displays or territorial disputes, though this remains debated among scientists. Its agile build suggests it was an active forager, moving quickly through forest undergrowth to find the best plant food whilst remaining alert for predators.
Stegoceras has appeared in several dinosaur documentaries and educational programmes, though it's less famous than some of its larger pachycephalosaur relatives in mainstream films and games.
Stegoceras was first described by Lawrence Lambe in 1902. The original fossils were discovered at Alberta, Canada.
