Euoplocephalus Facts
Pronunciation: you-oh-ploh-SEF-ah-lus
Name meaning: Well-armoured head
| Diet | Herbivore |
| Height | 2m |
| Length | 6m |
| Weight | 2.3 tonnes |
| Speed | 10 km/h |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Ankylosaur |
| Location | Canada |
Euoplocephalus was a heavily armoured ankylosaur that thundered across the Canadian landscape during the Late Cretaceous period, between 83.6 and 72.2 million years ago. This formidable herbivore measured up to 6 metres in length and stood about 2 metres tall at the hip, making it one of the larger armoured dinosaurs of its time. Its most striking feature was the extensive bony armour that covered its entire body from head to tail, earning it the name 'well-armoured head'.
The body of Euoplocephalus was built like a living tank, with rows of bony plates called osteoderms embedded in its skin, along with prominent spikes jutting from its shoulders and back. Its massive tail ended in a fearsome club made of fused bone that could deliver devastating blows to predators. Despite its intimidating appearance, this ankylosaur was a peaceful plant-eater that used its small, leaf-shaped teeth to process low-growing vegetation such as ferns, cycads, and early flowering plants.
Living in the lush river plains and forests of what is now Alberta, Euoplocephalus shared its habitat with famous predators like Albertosaurus and other herbivores including Centrosaurus and Parasaurolophus. When threatened, it likely crouched down to protect its less-armoured belly and used its powerful tail club as a weapon, much like a medieval knight wielding a mace.
What made Euoplocephalus distinctive?
Euoplocephalus was distinguished by its comprehensive body armour consisting of bony plates and spikes covering its back, sides, and even its eyelids. Its most recognisable feature was the massive bony club at the end of its tail, formed from fused vertebrae and measuring up to 45 centimetres across.
Behaviour
Euoplocephalus likely lived in small groups, using safety in numbers whilst foraging for low-growing plants. When confronted by predators, it would crouch down to protect its vulnerable underside and swing its powerful tail club in wide, bone-crushing arcs to deter attackers.
Discovery
Euoplocephalus was first described by Lawrence Lambe in 1910. The original fossils were discovered at Dinosaur Park Formation, Alberta, Canada.
Euoplocephalus FAQ
What did Euoplocephalus eat?
Euoplocephalus was a herbivore that fed on low-growing plants including ferns, cycads, mosses, and early flowering plants. Its small, leaf-shaped teeth were perfect for cropping vegetation, and it likely spent most of its day browsing close to the ground, using its broad beak to gather plant material.
How big was Euoplocephalus?
Euoplocephalus reached up to 6 metres in length and stood about 2 metres tall at the hip. It weighed approximately 2.3 tonnes, making it roughly the size of a modern rhinoceros but considerably more heavily built due to its extensive bony armour.
When did Euoplocephalus live?
Euoplocephalus lived during the
Late Cretaceous period, specifically between 83.6 and 72.2 million years ago. This places it in the Campanian stage of the Cretaceous, sharing its time with famous dinosaurs like
Albertosaurus and
Centrosaurus.
Where was Euoplocephalus found?
Euoplocephalus fossils have been discovered exclusively in Canada, primarily in the Dinosaur Park Formation of Alberta. This region was a warm, subtropical river plain during the
Late Cretaceous period, providing ideal conditions for preserving dinosaur fossils.
How do you pronounce Euoplocephalus?
Euoplocephalus is pronounced 'you-oh-ploh-SEF-ah-lus'. The name can be quite tricky, so it helps to break it down into syllables: Eu-oplo-ceph-alus, with the emphasis on the third syllable 'SEF'.
What does Euoplocephalus mean?
Euoplocephalus means 'well-armoured head' in Greek. The name perfectly describes this dinosaur's most distinctive feature - the extensive bony armour that covered not just its head, but its entire body from nose to tail.
How fast could Euoplocephalus run?
Euoplocephalus was not built for speed, with estimates suggesting it could reach maximum speeds of around 10 km/h. Its heavy armour and stocky build made it relatively slow-moving, but its defensive capabilities meant it didn't need to outrun predators.
What type of dinosaur was Euoplocephalus?
Euoplocephalus was an ankylosaur, a group of heavily armoured, herbivorous dinosaurs. More specifically, it belonged to the family Ankylosauridae, which includes the largest and most heavily armoured members of this dinosaur group.
Was Euoplocephalus related to birds?
Euoplocephalus was not closely related to birds. As an ankylosaur, it belonged to the ornithischian (bird-hipped) dinosaurs, but this group is not ancestral to modern birds. Birds actually evolved from theropod dinosaurs, which belong to the saurischian (lizard-hipped) group.
How many Euoplocephalus fossils have been found?
Euoplocephalus is known from numerous fossil specimens, including several nearly complete skeletons and many partial remains. It's one of the best-known ankylosaurs, with fossils representing multiple individuals of different ages, providing paleontologists with excellent insights into its anatomy and growth patterns.
