The 1.80 m (6 ft) long creature was related to the modern giraffe and okapi. Unlike these, however, Prolibytherium had a set of large, leaf-shaped ossicones with a width of 35 cm (1 ft 2 in). These were probably used for display and fights, much like the antlers of a deer.[1] It was once regarded as a giraffid. Specifically, it was once regarded as the ancestral form of the African species of Sivatherium (S. maurusium), when it was originally described as "Libytherium." Prolibytherium is now regarded as a climacoceratid, due to the formation of its wide, palmate ossicones.