Spiclypeus Facts
| Diet | Herbivore |
| Height | 2.5m |
| Length | 6m |
| Weight | 3 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Ceratopsian |
| Location | North America |

| Diet | Herbivore |
| Height | 2.5m |
| Length | 6m |
| Weight | 3 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Ceratopsian |
| Location | North America |
Spiclypeus was a remarkable ceratopsian dinosaur that lived approximately 83.6 million years ago during the Late Cretaceous period in what is now Montana, United States. This impressive plant-eater was distinguished by its unique skull ornamentation, which gave it its name meaning 'spike shield'. Like other ceratopsians, Spiclypeus was a quadrupedal herbivore built for processing tough vegetation.
The most striking feature of Spiclypeus was its elaborate frill decorated with distinctive spikes and ornamental projections. Its skull showed a fascinating asymmetry, suggesting this individual may have survived an injury or infection during its lifetime. The dinosaur possessed a large bony frill extending from the back of its skull, along with prominent horns that would have served both defensive and display purposes.
As a herbivore, Spiclypeus used its powerful beak and rows of grinding teeth to process ferns, cycads, and other Cretaceous plants. Its robust build and defensive features suggest it lived in environments where large predators posed a constant threat. The discovery of Spiclypeus has provided valuable insights into the diversity of ceratopsian dinosaurs in Late Cretaceous North America.
Measuring approximately 6 metres in length and standing 2.5 metres tall at the hip, Spiclypeus was a substantial dinosaur that would have weighed around 3 tonnes. Its fossils were discovered in the fossil-rich Judith River Formation, adding another fascinating chapter to our understanding of ceratopsian evolution.
Spiclypeus possessed a distinctive frill adorned with prominent spikes and ornamental projections, giving it its 'spike shield' name. The skull shows notable asymmetry, with one side displaying different horn and frill development, possibly due to an injury or infection that healed during the dinosaur's lifetime.
Like other ceratopsians, Spiclypeus likely lived in herds for protection against predators, using its impressive horns and frill both for defence and social display. The elaborate skull ornamentation would have been used in species recognition and possibly in dominance displays between individuals.
Spiclypeus was first described by Jordan Mallon and team in 2016. The original fossils were discovered at Judith River Formation, Montana, USA.