Dimorphodon was a primitive pterosaur, a group of flying reptiles that were related to dinosaurs, but were not considered dinosaurs themselves.
Like other pterosaurs, Dimorphodons had an elongated finger on each hand with a membrane that stretched from that finger to its body to create wings that enabled Dimorphodon to fly.
Including its long and thin tail, Dimorphodon measured about three feet long, with a wingspan of around four and a half feet.
Its skull was large and deep, with two different types of teeth in its jaws, which is unusual for reptiles. This is what gives the animal its name, which means “two form tooth”.