 Ossicone

Ossicones are horn-like or antler-like protuberances on the heads of giraffes, male okapis, and their extinct relatives, such as "Sivatherium", and the climacoceratids, such as "Climacoceras".It has been argued that these extinct species did not have true ossicones; however, later research has revealed their ossicones to be in line with those of giraffids.