Pteranodon is an extinct creature that scientists believe lived during the Cretaceous Period. It was a flying reptile with fuzzy skin and a small brain. When Jack and Annie met a Pteranodon in Dinosaurs Before Dark, they lovingly called it Henry. It was actually Morgan le Fay in disguise, as a way of keeping an eye on Jack and Annie during their First Four Adventures. She was also disguised as a cat, a Knight, and a Parrot.