Addax

The addax (Addax nasomaculatus), also known as the screwhorn antelope, is an antelope of the genus Addax, that lives in the Sahara desert. It was first described by Henri Blainville, a French zoologist and anatomist, in 1816. As suggested by its alternative name, this pale antelope has long, twisted horns. It is closely related to the oryx, but differs from other antelopes by having large, square teeth like cattle, and lacking the typical facial glands.