Contents -- Preface -- Acknowledgments -- List of Contributors -- List of Reviewers -- PART ONE OVERVIEW -- 1. Forty Years of Ceratophilia -- PART TWO SYSTEMATICS AND NEW CERATOPSIANS -- 2. Taxonomy, Cranial Morphology, and Relationships of Parrot-Beaked Dinosaurs(Ceratopsia: Psittacosaurus) -- 3. A New Species of Archaeoceratops (Dinosauria: Neoceratopsia) from the Early Cretaceous of the Mazongshan Area, Northwestern China -- 4. A Redescription of the Montanoceratops cerorhynchus Holotype with a Review of Referred Material -- 5. First Basal Neoceratopsian from the Oldman Formation (Belly River Group), Southern Alberta -- 6. Zuniceratops christopheri: The North American Ceratopsid Sister Taxon Reconstructed on the Basis of New Data -- 7. Horned Dinosaurs (Ornithischia: Ceratopsidae) from the Upper Cretaceous (Campanian)Cerro del Pueblo Formation, Coahuila, Mexico -- 8. New Basal Centrosaurine Ceratopsian Skulls from the Wahweap Formation (Middle Campanian), Grand Staircase-Escalante National Monument, Southern Utah -- 9. A New Pachyrhinosaurus-Like Ceratopsid from the Upper Dinosaur Park Formation (Late Campanian) of Southern Alberta, Canada -- 10. New Material of ''Styracosaurus'' ovatus from the Two Medicine Formation of Montana -- 11. A New Chasmosaurine (Ceratopsidae, Dinosauria) from the Upper Cretaceous OjoAlamo Formation (Naashoibito Member), San Juan Basin, New Mexico -- 12. A New Chasmosaurine Ceratopsid from the Judith River Formation, Montana -- 13. Description of a Complete and Fully Articulated Chasmosaurine Postcranium Previously Assigned to Anchiceratops (Dinosauria: Ceratopsia) -- 14. A New, Small Ceratopsian Dinosaur from the Latest Cretaceous Hell Creek Formation, Northwest South Dakota, United States: A Preliminary Description -- PART THREE ANATOMY, FUNCTIONAL BIOLOGY, AND BEHAVIOR.

15. Comments on the Basicranium and Palate of Basal Ceratopsians -- 16. Mandibular Anatomy in Basal Ceratopsia -- 17. Histological Evaluation of Ontogenetic Bone Surface Texture Changes in the Frill of Centrosaurus apertus -- 18. Modeling Structural Properties of the Frill of Triceratops -- Insert -- 19. New Evidence Regarding the Structure and Function of the Horns in Triceratops (Dinosauria: Ceratopsidae) -- 20. Evolutionary Interactions between Horn and Frill Morphology in Chasmosaurine Ceratopsians -- 21. Skull Shapes as Indicators of Niche Partitioning by Sympatric Chasmosaurine and Centrosaurine Dinosaurs -- 22. The Function of Large Eyes in Protoceratops: A Nocturnal Ceratopsian? -- 23. A Semi-Aquatic Life Habit for Psittacosaurus -- 24. Habitual Locomotor Behavior Inferred from Manual Pathology in Two Late CretaceousChasmosaurine Ceratopsid Dinosaurs, Chasmosaurus irvinensis (CMN 41357) and Chasmosaurus belli(ROM 843) -- 25. Paleopathologies in Albertan Ceratopsids and Their Behavioral Significance -- PART FOUR HORNED DINOSAURS IN TIME AND SPACE -- 26. An Update on the Paleobiogeography of Ceratopsian Dinosaurs -- 27. Unraveling a Radiation: A Review of the Diversity, Stratigraphic Distribution, Biogeography, and Evolution of Horned Dinosaurs (Ornithischia: Ceratopsidae) -- 28. A Review of Ceratopsian Paleoenvironmental Associations and Taphonomy -- 29. Behavioral Interpretations from Ceratopsid Bonebeds -- 30. Paleontology and Paleoenvironmental Interpretation of the Kikak-Tegoseak Quarry (Prince Creek Formation: Late Cretaceous), Northern Alaska: A Multi-Disciplinary Study of a High-Latitude Ceratopsian Dinosaur Bonebed -- 31. Taphonomy of Horned Dinosaurs (Ornithischia: Ceratopsidae) from the Late Campanian Kaiparowits Formation, Grand Staircase-Escalante National Monument, Utah.

32. A Centrosaurine Mega-Bonebed from the Upper Cretaceous of Southern Alberta: Implications for Behavior and Death Events -- 33. Insect Trace Fossils Associated with Protoceratops Carcasses in the Djadokhta Formation (Upper Cretaceous), Mongolia -- 34. Faunal Composition and Significance of High-Diversity, Mixed Bonebeds Containing Agujaceratops mariscalensis and Other Dinosaurs, Aguja Formation (Upper Cretaceous), Big Bend, Texas -- PART FIVE HISTORY OF HORNED DINOSAUR COLLECTION -- 35. Lost in Plain Sight: Rediscovery of William E. Cutler's Missing Eoceratops -- 36. Historical Collecting Bias and the Fossil Record of Triceratops in Montana -- Afterword -- Index.