Of all the dinosaurs that have ever lived, ceratopsians were some of the most impressive. There was the huge, three-horned Triceratops; Kosmoceratops, the so-called “horniest dinosaur“; and the hook-horned Einiosaurus, to name just a few. Yet ceratopsians were not just prickly giants. (All the big-bodied forms fall into a particular ceratopsian subgroup called ceratopsids.) The wider ceratopsian family included smaller forms with deep tails and skulls that generally lacked the imposing ornaments of their larger cousins. Protoceratops from the Cretaceous of Mongolia’s Gobi Desert is the most familiar of these often-overlooked ceratopsians, but North America sported a variety of genera, too. Among them was Montanoceratops, a comparatively small horned dinosaur