Pteroactylus (pronounced /ˌtɛrəˈdæktɨləs/ TER-o-DACK-ti-lus) is a genus of pterosaur (the first to be named and identified as a flying reptile) that lived during the late Jurassic Period. It was a carnivore and probably preyed upon fish and other small animals. Like all pterosaurs, the wings of Pterodactylus were formed by a skin and muscle membrane stretching from its elongated fourth finger to its hind limbs. It was supported internally by collagen fibres and externally by keratinous ridges. Fossils have been discovered in Europe and Africa.