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Avaceratops was a centrosaurine horned dinosaur that lived during the Late Cretaceous, in the famous Judith River deposits of western North America. The first specimen was believed to belong to a horned dinosaur that was 2.3 m (7.5 feet) long, although recent analysis of its bones show the animal was still growing rapidly, so we might expect it to have at least reached the size of its close relative Furcatoceratops, which grew closer to 4 m (12 feet) in length.
Both genera belong to a recently recognized group of centrosaurines called the Nasutoceratopsini, which includes the bull-horned Nasutoceratops. This group of basal centrosaurines had larger brow horns than nose horns, a distinctive look compared to later nose-horn dominant centrosaurines like Styracosaurus and Centrosaurus.
