Ceratopsidae

A large Canadian centrosaurine whose nose carried a broad roughened boss instead of a conventional horn, known from multiple partial skulls and regional bonebeds.

A short-frilled horned dinosaur from Alberta, famous for its long nasal horn, hooked frill ornaments and enormous mass-death bonebeds.

A classic long-frilled horned dinosaur from Alberta, known from complete skulls, articulated skeletons, skin impressions and a rare juvenile skeleton.

A massive latest-Cretaceous herbivore with a parrot-like beak, continuously replacing dental batteries, two long brow horns, a nasal horn and a solid bony frill. It lived alongside Tyrannosaurus during the final two million years of the dinosaur age.

A centrosaurine horned dinosaur from the upper Dinosaur Park Formation, distinguished by a huge nasal horn and long spikes around its frill. Several skulls show that the celebrated frill pattern varied—and could be strongly asymmetric—between individuals.