In the addax (Addax nasomaculatus), which is a distinct species common to North Africa and Syria, the ringed horns form an open spiral ascending in the plane of the face, and there is long, shaggy, dark hair on the fore-quarters in winter.
Ironically some of the most highly evolved cursors, such as saiga antelope, addax or bison have evolved short, light legs.
Roman mosaics show representations not only of this ass, but of the oryx, hartebeest, and perhaps of the addax.