Ariolo are a humanoid species and members of the United Federation of Planets.
Ariolo have a tough, almost leathery skin that is usually a dark grey or brown in color. They have angular heads that slope upwards from a low forehead to the rear of the cranium. The jaw is angled down so that the mouth, which reverses the angular pattern to slope upward away from the line of the jaw and forehead, protrudes slightly away from the face.
In 2285, the Ariolo were represented by two ambassadors to the Federation Council. (Star Trek IV: The Voyage Home)