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First-confirmed occurrence of a lambeosaurine dinosaur found on Alaska's North Slope. Paleontologists have discovered the first-confirmed occurrence of a lambeosaurine (Crested 'duck-billed' dinosaur) from the Arctic -- part of the skull of a lambeosaurine dinosaur from the Liscomb Bonebed (71-68 Ma) found on Alaska's North Slope. The discovery proves for the first time that lambeosaurines inhabited the Arctic during the Late Cretaceous. Source 5w.