Achelousaurus: quick facts

Achelousaurus was a horned dinosaur from the Late Cretaceous of Montana, notable for having rough bony bosses on its snout and over its eyes instead of true pointed horns. Its frill carried a pair of

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Reference background: Natural History Museum, London — Dinosaurs; Smithsonian National Museum of Natural History — Dinosaurs; American Museum of Natural History — Dinosaurs & Fossils. Figures are typical published ranges; taxonomy follows the source era and modern consensus is noted where it differs. See our sources & fact-check policy.