Ariolo were a humanoid species and members of the United Federation of Planets.

Ariolo had a tough, almost leathery skin that was usually a dark grey or brown in color. They had angular heads that sloped upwards from a low forehead to the rear of the cranium. The jaw was angled down so that the mouth, which reversed the angular pattern to slope upward away from the line of the jaw and forehead, protruded slightly away from the face.

In 2286, the Ariolo were represented by two ambassadors to the Federation Council. (Star Trek IV: The Voyage Home)