Chasmosaurus



Like many ceratopsians, chasmosaurs had three main facial horns  - one on the nose and two on the brow. Different fossil finds have produced inconclusive results - one species of Chasmosaurus, named C. kaiseni, bore long brow horns, while C. belli had only short ones. Although these were initially named as different species, it now seems possible that the long horns belonged to males and the shorter horns to females.