A Pterodactyl was a winged species of dinosaur that lived on the planet Earth millions of years ago.
In 2269, an away team from the Constitution-class starship Enterprise encountered physical manifestations of a group of Pterodactyls on the Amusement Park planet. They were the first indication that the planet's computer was malfunctioning and creating images which it wasn't meant to. (TAS: "Once Upon a Planet")