Horns and Beaks

Contributors Preface Acknowledgments I. Beaked Dinosaurs: The Ornithopods 1. Callovosaurus leedsi, the Earliest Dryosaurid Dinosaur (Ornithischia: Euornithopoda) from the Middle Jurassic of England Jose Ignacio Ruiz-Omenaca, Xabier Pereda Suberbiola, and Peter M. Galton 2. Teeth of Ornithischian Dinosaurs (Mostly Ornithopoda) from the Morrison Formation (Upper Jurassic) of the Western United States Peter M. Galton 3. 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 Carpenter 4. Turning the Old into the New: A Separate Genus for the Gracile Iguanodont from the Wealden of England Gregory S. Paul 5. A Possible New Basal Hadrosaur from the Lower Cretaceous Cedar Mountain Formation of Eastern Utah David Gilpin, Tony DiCroce, and Kenneth Carpenter 6. Postcranial Osteology of the Hadrosaurid Dinosaur Brachylophosaurus canadensis from the Late Cretaceous of Montana Albert Prieto-Marquez 7. "Leonardo," a Mummified Brachylophosaurus (Ornithischia: Hadrosauridae) from the Judith River Formation of Montana Nate L. Murphy, David Trexler, and Mark Thompson 8. 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. Wagner 9. Osteochondrosis in Late Cretaceous Hadrosauria: A Manifestation of Ontologic Failure Bruce Rothschild and Darren H. Tanke 10. Deciphering Duckbills: A History in Nomenclature Benjamin S. Creisler II. Horned Dinosaurs: Ceratopsians 11. Cranial Anatomy and Biogeography of the First Leptoceratops gracilis (Dinosauria: Ornithischia) Specimens from the Hell Creek Formation, Southeast Montana Christopher J. Ott 12. Cranial Osteology and Phylogenetic Relationships of the Chasmosaurine Ceratopsid Torosaurus latus Andrew A. Farke 13. Growth and Population Age Structure in the Horned Dinosaur Chasmosaurus Thomas M. Lehman 14. Bone Resorption, Bone Lesions, and Extracranial Fenestrae in Ceratopsid Dinosaurs: A Preliminary Assessment Darren H. Tanke and Andrew A. Farke 15. "Bison" alticornis and O. C. Marsh's Early Views on Ceratopsians Kenneth Carpenter Index