Euoplocephalus

Say it like this: “yoo-OP-loh-SEF-uh-luhs”

Euoplocephalus tutus

Euoplocephalus ate plants and walked on four legs. It lived in the Late Cretaceous. Bones have been found in Canada.

Quiz me on Euoplocephalus

When: Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
Named in: 1910 · Lambe, L. M.
Hip height: Not established
Length: 5.3 m · 17 ft
Weight: 2 tonnes
Found in: Canada · Dinosaur Park
Food and walking: Herbivore · Four legs
Kind: armored dinosaur · Ankylosaur
Family branch: Ankylosaurinae

The story in short

The genus Euoplocephalus dates to 1910, the year L. M. Lambe described it. The name means “well-armored head.”

It lived in the Late Cretaceous (Campanian), roughly 83.6 to 72.2 million years ago. Finds come from Canada, including the Dinosaur Park Formation. It was a herbivore and walked on four legs.

Published estimates put Euoplocephalus at a length near 5.3 m and a body mass around 2 tonnes.

On the family tree it sits in Ankylosaurinae, among the armored dinosaurs.

Close relatives

Akainacephalus

Akainacephalus johnsoni

Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago

Ankylosaurus

Ankylosaurus magniventris

Late Cretaceous (Maastrichtian) · roughly 72.2 to 66 million years ago

Anodontosaurus

Anodontosaurus lambei

Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago