Montanoceratops
Montanoceratops was up to 6 feet long (1.8 m) and weighed about 900 pounds (400 kg). Montanoceratops lived in the late-Cretaceous period, about 72 to 65 million years ago, toward the end of the Mesozoic, the Age of Reptiles. Fossils have been found in Montana and Alberta, Canada.