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Skulls of Horned Dinosaurs

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Skulls of Horned Dinosaurs.jpg PterodactylsThumbnailsSkeleton of Tyrannosaurus in comparison with human skeletonPterodactylsThumbnailsSkeleton of Tyrannosaurus in comparison with human skeletonPterodactylsThumbnailsSkeleton of Tyrannosaurus in comparison with human skeletonPterodactylsThumbnailsSkeleton of Tyrannosaurus in comparison with human skeletonPterodactylsThumbnailsSkeleton of Tyrannosaurus in comparison with human skeletonPterodactylsThumbnailsSkeleton of Tyrannosaurus in comparison with human skeleton

Skulls of Horned Dinosaurs. The lower row, Ceratops, Styracosaurus, Monoclonius, are from the Middle Cretacic (Belly River formation) of Alberta; Anchiceratops is from the Upper Cretacic (Edmonton formation) of Alberta; Triceratops and Torosaurus from the uppermost Cretacic (Lance formation) of Wyoming.