Dimorphodon was a medium-sized (wingspan of about 4.5 feet) pterosaur that lived in the Early Jurassic Period (about 200 million years ago) in what is now the British Iles. Pterosaurs were the first reptiles to fly. Although superficially similar to modern bats and birds, they were not related to either group.Scientific Name: Dimorphodon, meaning ‘two form tooth’Characteristics: Dimorphodon, like most other early pterosaurs, still had teeth, and lacked the skull crest seen in later members of the group. It had an unusually large head, and two d