A restoration of Euoplocephalus tutus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Cerapoda
clade: Dinosauria
Superorder: Ornithopoda
Genus: Euoplocephalus
Lambe, 1910
Type species
Euoplocephalus tutus
Lambe, 1902
  • Stereocephalus tutus Lambe, 1902

Euoplocephalus (Greek, "well-armed head") belonged to the Ankylosaur family. It lived during the Cretaceous period until the great extinction. It was one of the final species in a long line of evolving Ankylosaurs. Euoplocephalus often traveled in herds of Iguanodonts which offered protection to itself and to the Iguanodonts and the Euoplocephalus. It is very likely it was similar in appearance to it's relative, Ankylosaurus, except that the Euoplocephalus had armour on its head, unlike the Ankylosaurus.

Euoplocephalus body was covered in "armor", which was actually bone plating, which protected it from predators. Its tail was a giant club, much like a mace, that could be used as a weapon to defend itself from predators. It is believed that it would lay down and pull its limbs under the boney plates to keep itself from being damaged, and then it would swing its tail until a predator lost interest or became mortally injured by the club like tail. Some paleontologists believed this was such a good adaptation that if the great extinction didn't occur Euoplocephalus might still have been alive today.


The Euoplocephalus was around 6-7 meters long, medium sized for an Ankylosaurid, and lived around the same time as its more famous cousin, the Ankylosaurus. It's spiked and knobby armor probably protected it from lots of different predators, but would be doubtful against the ferocious bite of a Tyrannosaurus, or other large predator. Like all Ankylosaurids, Euoplocephalus probably grazed on low-lying plants, such as primitive bushes, and ferns.

Discovery and species



It lived to the western side of North America, where a huge inland sea provided lots of moisture, and easy accessibility to food for the Euoplocephalus.


In the Media

  • This dinosaur was featured in the Disney movie, Dinosaur, as Earl, a pet which acted like a dog. Of course, this was not meant to be accurate, but for entertainment.
  • Euoplocephalus was a dinosaur featured in the novel, Jurassic Park.
  • Euoplocephalus also appears in the toyline for Jurassic Park III, despite never appearing in the film.
  • It apparently suffered cruelty after the Isla Nublar Incident of 2015 before Jurassic World: Fallen Kingdom. It is unknown if there are any surviving populations.
  • It also appeared in Jurassic World: The Game and Jurassic Park Builder as a purchasable dinosaur.
  • In the PlayStation Game Version of The Lost World: Jurassic Park it was seen as a boss level fighting the Velociraptor.
  • Euoplocephalus appears in a dozen episodes of Dinosaur Train. There's a character named Eugene Euoplocephalus that lives by The Big Pond & is the areas for expert of Dino Ball.
  • Euoplocephalus appears in a dozen episodes & Three Seasons of Dino Dan.
  • Euoplocephalus appears in Jurassic World: Alive.
  • Euoplocephalus appears in Jurassic World: Evolution’s Claire’s Sanctuary DLC.