 Ceratopsia was coined by Othniel Charles Marsh in 1890 to include dinosaurs possessing certain characteristic features , including horns , a rostral bone , teeth with two roots , fused neck vertebrae , and a forward @-@ oriented <unk> . Marsh considered the group distinct enough to warrant its own suborder within <unk> . The name is derived from the Greek <unk> / <unk> meaning ' horn ' and <unk> / <unk> meaning ' face ' . As early as the 1960s , it was noted that the name Ceratopsia is actually incorrect linguistically and that it should be <unk> . However , this spelling , while technically correct , has been used only rarely in the scientific literature , and the vast majority of paleontologists continue to use Ceratopsia . As the <unk> does not govern taxa above the level of superfamily , this is unlikely to change . 
