Prolibytherium

Prolibytherium is an extinct climacoceratid artiodactyl ungulate native to Middle Miocene North Africa and Pakistan, from around 16.9 to 15.97 million years ago. Fossils of "Prolibytherium" were found in the Marada Formation of Libya, Vihowa Formation of Pakistan, and the Moghara Formation of Egypt.
Description.
The long creature would have superficially resembled an okapi or a deer. Unlike these, however, "Prolibytherium" displayed dramatic sexual dimorphism, in that the male had a set of large, leaf-shaped ossicones with a width of , while the female had a set of slender, horn-like ossicones.
The taxonomic status of "Prolibytherium" remains in flux. At one time, it was described as a relative of "Sivatherium" (as a precursor to "Libytherium maurusium" ("S. maurusium")). Later, it would be regarded as a palaeomerycid, or either as a climacoceratid, or as a basal member of Giraffoidea. With the discovery and study of a female skull in 2010, "Prolibytherium" is tentatively confirmed as a climacoceratid.