fill). However, at least some of these holes show evidence that they are the result of injury or disease. The nasal horn of this specimen is low and rounded, compared with the larger, pointed nose horns of typical Triceratops specimens, though this feature appears to be within the known range of individual variation for Triceratops. Classification The type species is Nedoceratops hatcheri. Nedoceratops belonged to the Ceratopsia (the name is Latinised Greek for "horned faces"), a group of herbivorous dinosaurs with parrot-like beaks which thrived in North America and Asia during the Cretaceous Period, which ended roughly 66 million years ago. All ceratopsians became extinct at the end of this era. Several authors have suggested that Nedoceratops may be directly ancestral to Triceratops, or perhaps its nearest relative. An ongoing debate concerns the status of Triceratops, Torosaurus, and Nedoceratops. In a series of publications, John B. Scannella and John R. Horner (2010 and 2011) and claimed that the USNM 2412 skull (i.e., of Nedoceratops) belonged to a "young adult" Triceratops. Evidence for this hypothesis included the shapes of the epoccipital and squamosal bones, and a neck frill (parietal bone) that had "incipient" openings (contrasting with no openings in subadult Triceratops and large openings in adult Triceratops formerly assigned to Torosaurus). These authors suggested that all three "genera" actually represent different aged individuals of Triceratops. In 2012, Farke proposed a counterargument, and suggested that the bone surface texture and shape of the horns of Nedoceratops indicate an "old adult". A follow-up study by Leonardo Maiorino and colleagues in 2013 using morphometrics found support for Triceratops and Torosaurus being distinct, valid taxa, with Nedoceratops occupying variable positions with respect to the other two but generally outside the range of variation, concluding that "the size of USNM 2412 is a plausible intermediate, but the shape is not." Another supposed difference between Nedoceratops and fossils referred to Triceratops horridus is the remarkably short, rounded nasal "horn". Scanella and Horner proposed that the nasal horn of the USNM 2412 skull could have been lost when the animal was alive or when it became fossilized. However, it has been noted the horns of ceratopsids show a great deal of variation between age groups and individuals, and some specimens more solidly attributed to T. horridus have a similar nasal horn shape. In most features- the short, saddle-shape frill, the s-shaped snout- the animal closely resembles Triceratops horridus.