An extinct order of flying reptiles—the pterodactyls—that lived in the late Triassic, Jurassic, and Cretaceous periods (225–65 million years ago). Pterodactyls had beaked jaws and an elongated fourth finger that supported a membranous wing, with wingspans ranging from 50 cm to 13 m. They had long jointed tails, no feathers, and were capable of powered flapping flight.