Placerias was a ox sized dicynodont that lived during the late triassic period in which is now North America.
Placerias weighed 1 ton and was hunted by animals like postosuchus. It was terribly slow and relied on its numbers for most self defence. It had tusks and a powerful beak although tough, they were actually peacefull herbivores.
In other MediaEdit
Placerias was shown in walking with dinosaurs, the episode name was, New Blood.