Diceratops -described by Lull, 1905 (Dodson, 1996). Its name means "two-horned face". It has a large skull, about 2m long, but it is oddly short faced with a very weak, blunt nasal horn core (described by Lull to be missing). Its large brow horns are nearly vertical. The squamosals on the side of the frill are pierced with large openings, and the thin parietal appears to contain only small fenestrae (Dodson, 1996). As the skull is quite unusual, it is highly controversial as to whether or not Diceratops is a real genus, or rather a subgenus ofTriceratops (Dodson, 1996).