Pteranodon was a flying reptile that lived near oceans and ate fish and lizards. It is commonly called the pterodactyl even though pterodactyl never existed. Pterodactyl is a mix of a bunch of pterosaurs (flying reptiles) that when found was thought to be a new species of pterosaur. You can tell the difference between pteranodon and other pterosaurs because pteranodons have a crest, no teeth, and have very short tails. Pteranodons have three fingers, and the third finger is very long. The wing is connected to the finger so that is why the wing span is so large.