Neesan pterodactyls were large pterosaurs from the planet Neesan. Some of the pterodactyls were at least partially domesticated and were ridden by Neesan humanoid natives.
In the year 2266, a landing party to Neesan from the USS Enterprise, consisting of Captain James T. Kirk, Commander Montgomery Scott and Doctor Leonard McCoy, were attacked by pterodactyls and their riders. (TOS comic: "The Cosmic Cavemen")