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The article focuses on the sexual dimorphism of the frontal appendages in the African pecoran Prolibytherium Magnieri Arambourg, 1961 (Mammalia, Ruminantia). Prolibytherium is discovered in the lower Miocene strata from Libya and Egypt and is described by having a 'butterfly wing'-like cranial appendage that develops, parallel to the dorsal surface of the skull. It notes that the study used fossil specimens and observed two main differences between the cranial appendages of Prolibytherium and climacoceratids such as more porous core of Prolibytherium and the non-vascular grooves of climacoceratids like those of Prolibytherium. The study found that the developed cranial wing-like of the Male Prolibytherium is used for display purposes to their female counterpart.