Euoplocephalus

Euoplocephalus Temporal range: Late Cretaceous, 76.4–75.6 Ma PreЄ Є O S D C P T J K Pg N ↓
Reconstruction of specimen ROM 1930, Senckenberg Museum
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Order:	†Ornithischia
Family:	†Ankylosauridae
Subfamily:	†Ankylosaurinae
Genus:	†Euoplocephalus Lambe, 1910
Type species
†Stereocephalus tutus Lambe, 1902
Species
†Euoplocephalus tutus (Lambe, 1902)
Synonyms
Stereocephalus tutus Lambe, 1902 (preoccupied)

†Euoplocephalus tutus (Lambe, 1902)

Stereocephalus tutus
Lambe, 1902 (preoccupied)

Euoplocephalus (/juːˌɒploʊˈsɛfələs/ yew-OP-lo-SEF-ə-ləs) is one of the largest genera of herbivorous ankylosaurian dinosaurs, living during the Late Cretaceous of Canada. It has only one named species, Euoplocephalus tutus.

The first fossil of Euoplocephalus was found in 1897 in Alberta. In 1902, it was named Stereocephalus, but that name had already been given to an insect, so it was changed in 1910. Later, many more ankylosaurid remains were found from the Campanian of North America and often made separate genera. In 1971, Walter Coombs concluded that they all belonged to Euoplocephalus which then would be one of the best-known dinosaurs. Recently however, experts have come to the opposite conclusion, limiting the authentic finds of Euoplocephalus to about a dozen specimens. These include a number of almost complete skeletons, so much is nevertheless known about the build of the animal.