http://www.smithsonianmag.com/science-na...pic&no-ist
Quote:Before getting into the nitty-gritty details of the discovery, it’s important to note that pterosaurs aren’t dinosaurs. These reptiles share a different evolutionary history to their dino cousins. Thus, unlike dinosaurs, they aren’t directly related to birds either. Pterosaurs dominated the skies during the Cretaceous and Jurassic periods, but pterosaurs and birds are two evolutionary paths that separately reached the skill set of flight.