Cockerosaurus is a herbivorous dinosaur of the genus Cockerosaurus of the ornithopterosaurus family. Its Latin name means "open and split reptile", and it is also known as Gasperosaurus and Cracerosaurus. Its body length is 4.8-6 meters, its weight is 3.6 tons, its head shield is wide and heart-shaped with holes, its nose has short corners, and its frontal horn length varies by sex. The dorsum has a tumor-like protrusion 5cm in diameter, and the neck fold leaf structure is longer than that of Triceratops. The known species include Billerosaurus, Canadian killerosaurus, etc. Some fossils have been classified as agouhaerosaurus. The species lived in Late Cretaceous North America, and most fossils were found in Alberta, Canada.

It is a type of dinosaur that lived in the late Cretaceous period and is known for its unique head features, namely one or more pairs of large bony horns at the back of the skull. These horns are usually spear shaped and very spectacular. The ceratopsian dinosaurs belong to the bird hipped order and are a large group within the dinosaur family. They have a large body size, usually with strong limbs and thick skin, as well as a wide jaw and sharp teeth, suitable for chewing hard plants. Fossils of ceratopsian dinosaurs have been found in North America and Asia, and are important materials for studying dinosaur evolution and paleoecological environments.