It has been noted that many of the features that seem to separate Nedoceratops from Triceratops, and specifically Triceratops horridus, may be the result of pathology, injury, and/or deformation of the skull after burial. Two of the features that have been used to diagnose Nedoceratops - the position of the squamosal, and the upright brow horns- are seen on one side of the skull, but not the other. This, along with the fact that the entire skull can be seen to be twisted when seen head-on, have been used to argue that these features result from post-mortem distortion of the fossil, rather than reflecting the anatomy of the animal during life. Furthermore, the presence of numerous holes in the frill suggests pathology due to injury or illness, the supposedly unique 'parietal fenestrae' may therefore be the result of an injury. Tanke & Farke (2007) noted that the supposed parietal fenestra had an irregular shape with swollen margins and an irregularly vascularized texture. This is similar to a parietal hole, also interpreted as the result of an injury by Marshall & Barreto (2001), in a specimen of Torosaurus. Unfortunately, the frill is only preserved on one side, which makes it difficult to test this hypothesis. References External links Chasmosaurines Late Cretaceous dinosaurs of North America Fossil taxa described in 2007 Maastrichtian life Lance fauna Paleontology in Wyoming Controversial dinosaur taxa Maastrichtian genus first appearances Maastrichtian genus extinctions Ornithischian genera