Euoplocephalus ( ; Greek: eu-/ευ- meaning 'well', hoplo-/οπλο- meaning 'armed' and kephale/κεφαλη meaning 'head') is one of the largest genera of ankylosaurian dinosaurs, at about the size of a small elephant. Like other ankylosaurids, it has extensive spiked armor, low-slung body and great club-like tail that are well documented in the fossil record. Description Among the ankylosaurids, Euoplocephalus was exceeded in size only by Tarchia and Ankylosaurus. Euoplocephalus was long and weighed about . It was also wide. The skull of Euoplocephalus can be distinguished from other a...

Edmontonia was an armoured dinosaur, a part of the nodosaur family from the Late Cretaceous Period. It is named after the Edmonton Formation (now the Horseshoe Canyon Formation), the unit of rock it was found in. Description Edmontonia was bulky and tank-like at roughly 6.6 m (22 ft) long and 2 m (6 ft) high. It had small, ridged bony plates on its back and head and many sharp spikes along its back and tail. The four largest spikes jutted out from the shoulders on each side, two of which were split into subspines in some specimens. Its skull had a pear-like shape whe...