"Strong Roof Horn"
Length: 2m (6.6ft)
Weight: 68kg (150lbs.)
Location: Alberta, Canada
Era: Campanian age, upper Cretaceous (75 million years ago)
The first Pachycephalosaur known from reasonably complete remains. When it was first discovered, deprived of the context of its relatives, Stegoceras was something of an anomaly, considered perhaps to be a very unusual, thick skulled Ornithopod.
Ornatotholus browni Wall & Galton, 1979