Coahuilaceratops magnacuerna is a genus of ceratopsian dinosaur which lived in what is now Mexico. Coahuilaceratops fossils have been recovered from strata of the Late Cretaceous Period, around 84 million to 70 million years ago.
Coahuilaceratops had the largest horns of any dinosaur currently known, up to 1.2m (4 feet) long.
It is the first horned dinosaur from Mexico.