The Ornithopods include Iguanodon, one of the first dinosaurs ever discovered and analyzed, and perhaps the best-documented group, the hadrosaurs or 'duckbilled dinosaurs.' The Ceratopsians include Triceratops, known for its distinctive three-horned skull and protective collar. This book collects information on these two groups of animals.

ContributorsPrefaceAcknowledgmentsI. Beaked Dinosaurs: The Ornithopods1. Callovosaurus leedsi, the Earliest Dryosaurid Dinosaur (Ornithischia: Euornithopoda) from the Middle Jurassic of England José Ignacio Ruiz-Omeñaca, Xabier Pereda Suberbiola, and Peter M. Galton2. Teeth of Ornithischian Dinosaurs (Mostly Ornithopoda) from the Morrison Formation (Upper Jurassic) of the Western United States Peter M. Galton3. A Description of a New Ornithopod from the Lytle Member of the Purgatoire Formation (Lower Cretaceous) and a Reassessment of the Skull of Camptosaurus Kathleen Brill and Kenneth Carpenter4. Turning the Old into the New: A Separate Genus for the Gracile Iguanodont from the Wealden of England Gregory S. Paul5. A Possible New Basal Hadrosaur from the Lower Cretaceous Cedar Mountain Formation of Eastern Utah David Gilpin, Tony DiCroce, and Kenneth Carpenter6. Postcranial Osteology of the Hadrosaurid Dinosaur Brachylophosaurus canadensis from the Late Cretaceous of Montana Albert Prieto-Marquez7. "Leonardo," a Mummified Brachylophosaurus (Ornithischia: Hadrosauridae) from the Judith River Formation of Montana Nate L. Murphy, David Trexler, and Mark Thompson8. Discussion of Character Analysis of the Appendicular Anatomy in Campanian and Maastrichtian North American Hadrosaurids—Variation and Ontogeny Michael K. Brett-Surman and Jonathan R. Wagner9. Osteochondrosis in Late Cretaceous Hadrosauria: A Manifestation of Ontologic Failure Bruce Rothschild and Darren H. Tanke10. Deciphering Duckbills: A History in Nomenclature Benjamin S. CreislerII. Horned Dinosaurs: Ceratopsians11. Cranial Anatomy and Biogeography of the First Leptoceratops gracilis (Dinosauria: Ornithischia) Specimens from the Hell Creek Formation, Southeast Montana Christopher J. Ott12. Cranial Osteology and Phylogenetic Relationships of the Chasmosaurine Ceratopsid Torosaurus latus Andrew A. Farke13. Growth and Population Age Structure in the Horned Dinosaur Chasmosaurus Thomas M. Lehman14. Bone Resorption, Bone Lesions, and Extracranial Fenestrae in Ceratopsid Dinosaurs: A Preliminary Assessment Darren H. Tanke and Andrew A. Farke15. "Bison" alticornis and O. C. Marsh's Early Views on Ceratopsians Kenneth CarpenterIndex