Ojoceratops Fowleri on:
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''Ojoceratops'' ( meaning "Ojo Alamo horned face") 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 (probably Maastrichtian age, 68 million years ago). The type species is ''Ojoceratops fowleri''.
It is very similar to its close relative ''Triceratops'', though it is from an earlier time period and has a more squared-off frill. Nick Longrich, in 2011, noted that the squared-off frill is also found in some true ''Triceratops'' specimens and that ''Ojoceratops'' is probably a junior synonym of ''Triceratops'', while Holtz (2010) noted that it is probably ancestral to ''Triceratops'' and possibly synonymous with the contemporary ''Eotriceratops''.Holtz, Thomas R. Jr. (2011) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,'
Winter 2010 Appendix.
/ref> However, Jasinski et al. (2011) argued that the genus is valid on the basis of other diagnostic features not recognized by Longrich (2011), including the parietal bar not seen in any ''Triceratops'' specimens, the wide arched squamosal, enlarged base, etc. Maiorino et al. (2015) also considered ''Ojoceratops'' as a valid taxon in their phylogenetic analysis. Cladistic analyses revealed that ''Regaliceratops'' is in a polytomy with ''Ojoceratops'' and ''Eotriceratops''.
Classification
It is very similar to its close relative ''Triceratops'', though it is from an earlier time period and has a more squared-off frill. Nick Longrich, in 2011, noted that the squared-off frill is also found in some true ''Triceratops'' specimens and that ''Ojoceratops'' is probably a junior synonym of ''Triceratops'', while Holtz (2010) noted that it is probably ancestral to ''Triceratops'' and possibly synonymous with the contemporary ''Eotriceratops''.Holtz, Thomas R. Jr. (2011) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,'Winter 2010 Appendix.
/ref> However, Jasinski et al. (2011) argued that the genus is valid on the basis of other diagnostic features not recognized by Longrich (2011), including the parietal bar not seen in any ''Triceratops'' specimens, the wide arched squamosal, enlarged base, etc. Maiorino et al. (2015) also considered ''Ojoceratops'' as a valid taxon in their phylogenetic analysis. Cladistic analyses revealed that ''Regaliceratops'' is in a polytomy with ''Ojoceratops'' and ''Eotriceratops''.
See also
* Timeline of ceratopsian researchReferences
Chasmosaurinae Dinosaur genera Maastrichtian dinosaurs Ojo Alamo Formation Taxa named by Robert M. Sullivan Taxa named by Spencer G. Lucas Fossil taxa described in 2010 Dinosaurs of the United States {{Ornithischian-stub