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Skulls of Horned Dinosaurs

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Skulls of Horned Dinosaurs.jpg Skulls of Iguanodont and Trachodont DinosaursThumbnailsSkulls of Dinosaurs, illustrating the principal typesSkulls of Iguanodont and Trachodont DinosaursThumbnailsSkulls of Dinosaurs, illustrating the principal typesSkulls of Iguanodont and Trachodont DinosaursThumbnailsSkulls of Dinosaurs, illustrating the principal typesSkulls of Iguanodont and Trachodont DinosaursThumbnailsSkulls of Dinosaurs, illustrating the principal typesSkulls of Iguanodont and Trachodont DinosaursThumbnailsSkulls of Dinosaurs, illustrating the principal typesSkulls of Iguanodont and Trachodont DinosaursThumbnailsSkulls of Dinosaurs, illustrating the principal types

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.