Pteranodontidae

Pteranodontidae is a family of large pterosaurs of the Cretaceous Period of North America. Many pteranodontids had a distinctive, elongated crest jutting from the rear of the head (most famously seen in Pteranodon itself). The spectacularly-crested Nyctosaurus is often included in this family, though originally placed in its own family, the Nyctosauridae (Williston, 1903).