Ojoceratops
Ojo Alamo horned face
Late Cretaceous stages
Ojoceratops is a genus of ceratopsian dinosaur which lived in what is now New Mexico, United States. Ojoceratops fossils have been recovered from strata of the Ojo Alamo Formation (Naashoibito Member), dating to the late Cretaceous period (late Maastrichtian age, 66 million years ago). The type species is Ojoceratops fowleri.
Diagnosis
- Squamosal enlarged base lacking embayment of otic notch
- Squamosal forms 115° angle at epijugal 1 position
- Squamosal distal end truncated and squared off
- Squamosal medial border concave, lateral border convex forming 80° arc
- Parietal median bar expands laterally to ~90 mm with ovoid depressions on lateral wings
Species
Ojoceratops fowleri Sullivan & Lucas, 2010
Type species
Honors Denver Fowler, who discovered the holotype and collected a number of the specimens described in Sullivan and Lucas (2010).
- Holotype
- SMP VP-1865 , State Museum of Pennsylvania
- Material
- Complete left squamosal
- Horizon
- Naashoibito Member, Ojo Alamo Formation, Maastrichtian, Late Cretaceous , 72.2–66.0 million years ago
- Locality
- SMP locality 410b, Willow Wash, New Mexico, United States
References
- Sullivan, R. M.; Lucas, S. G. (2010). A new chasmosaurine (Ceratopsidae, Dinosauria) from the Upper Cretaceous Ojo Alamo Formation (Naashoibito Member), San Juan Basin, New Mexico. New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium (Ryan, M. J.; Chinnery-Allgeier, B. J.; Eberth, D. A., eds.) 169-180. Indiana University Press, Bloomington. sullivan2010a