Euoplocephalus

Euplocephalus (meaning "well-armored head") was a large armored dinosaur, measuring about 20 feet (6 m) long; it weighed about 2 tons. Its wide head had a horny, toothless beak, small, peg-like cheek teeth, bony horns, and a small brain. Among its contemporaries were the large meat-eating Tyrannosaurus and Deinonychus.

Fossils from more than 40 individuals have been discovered in Alberta, Canada and Montana in the United States, making Euoplocephalus the best known ankylosaurid.Arbour V.M.; Currie P.J. 2013. Euoplocephalus tutus and the diversity of Ankylosaurid dinosaurs in the Late Cretaceous of Alberta, Canada, and Montana, USA. PLOS ONE. 8 (5): e62421.  This includes 15 skulls, teeth, and a few almost-complete skeletons, found with the armor still attached.Vickaryous M.K. et al. 2004. "Ankylosauria" In D.B. Weishampel, P. Dodson, and H. Osmolska (eds) The Dinosauria. 2nd ed, University of California Press, Berkeley. 363-392 Individual armor plates are the most commonly found element from them.

 References 

Category:Ankylosauria