Pteranodontia is an extinct group of ornithocheiroid pterodactyloid pterosaurs that lived during the Late Cretaceous period of North America and Africa. They were some of the most advanced pterosaurs, and possessed highly specialized cranial crests that may have served as sexual attraction, with males having a much larger crest.
Image: Pteranodon sp AMNH 7515
Image: Nyctosaurus gracilis skull Pterosaurs Flight in the Age of Dinosaurs
Ornithocheiroidea is a group of pterosaurs within the extinct suborder Pterodactyloidea. They were typically large pterosaurs that lived from the Early to Late Cretaceous periods, with fossil remains found all over the world except Antarctica.
Image: Thalassodromeus in Japan
Image: Tropeognathus mesembrinus MN 01