Tooth-marked bones are more common in the fossil record than published accounts would lead us to believe, but with rare exceptions, the animals that made the marks cannot be identified. A partial skeleton of an azhdarchid pterosaur found in Upper Cretaceous strata of Dinosaur Provincial Park was eaten by the theropod Saurornitholestes langstoni, which left tooth marks and the broken tip of one tooth imbedded in one of the bones. The presence of the broken dinosaur tooth is the first reported in association with tooth-marked bone, and probably indicates that the dromaeosaur was a scavenger in this case. Because the bitten pterosaur bone was thin walled, the bone must have been very tough to have broken the theropod tooth.

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