Dimorphodon macronyx is a genus of medium-sized pterosaur from the Early Jurassic period, living approximately 201 to 191 million years ago in what is now England. It was discovered in 1828 by the famous fossil hunter Mary Anning at Lyme Regis on the Dorset coast, making it the first pterosaur found in England. Originally classified as a species of Pterodactylus, it was given its own genus name by paleontologist Richard Owen in 1859. The name Dimorphodon means “two-form tooth,” referring to the fact that it had two distinct types of teeth in its jaws: four or five large fang-like teeth at the front followed by many smaller teeth behind them, which is comparatively rare among reptiles.

Dimorphodon was a medium-sized pterosaur with a wingspan of approximately 1.45 metres (4.75 feet) and a body length of about 1 metre (3.3 feet). Its most distinctive feature was its proportionally enormous skull, approximately 22 centimetres in length, which was lightened by large openings separated by thin walls of bone, like the arches of a bridge. Despite its large head, the body was relatively compact. Like Rhamphorhynchus, Dimorphodon had a long tail with a rudder-like tip. It probably inhabited coastal regions and was likely a piscivore, using its distinctive front teeth to catch fish, though it may also have hunted small land vertebrates and insects. Modern research suggests Dimorphodon may have been covered in pycnofibers, a hair-like integument, over much of its body, which the Mattel Survival figure acknowledges with the pycnofibers sculpted along the spinal column.