In common with the okapi, giraffes have skin-covered horns on the head, but in these animals, which form the genus Giraffa, these appendages are present in both sexes; and there is often an unpaired one in advance of the pair on the forehead.
Again, in Palaeotragus the horns (present only in the male) are situated immediately over the eye-sockets, in Ocapia they are placed just behind the latter, while in Giraffa they are partly on the parietals.
In the Giraffidae, which include not only giraffes (Giraffa) but also the okapi (Ocapia) and a number of extinct species from the Lower Pliocene Tertiary deposits of southern Europe, Asia and North Africa, the appendages on the skull are of type No.
The giraffes (Giraffa) are now an exclusively African genus, and have long legs and neck, and three horns - a single one in front and a pair behind - supplemented in some instances with a rudimentary pair on the occiput.
Giraffe Giraffa camelopardalis and giant eland Tragelaphus derbianus (T) are not present.