Pteranodon was a large winged reptile known as a pterosaur. It was known for the large blade-like crest on its head. A minority, about one third of the fossils found, are 50% larger with bigger crests, and are thought to be the adult males. The crest differs by individual, age and gender. There are two accepted species; P. longiceps with a narrow crest projecting back that doubles the skull length and P. sternbergi with a spade-shaped crest projecting upward that was four times taller than the skull. Some scientists put P. sternbergi in its own genus, Geosternbergia.
Hollow bones were more wide-spread in Pteranodon than in earlier pterosaurs, giving them a more efficient avian-style lung system. Pteranodon had slender jaws that were extended by a beak that was weak and, for a pterodactylid, it had a short tail and four toes. Its wingspan could be as wide as 20 feet. Their bodies were covered by short, thick, hair-like structures called pycnofibers.
Wing Length: 20 ft (6 meters).
Weight: 20 – 93 kg (44 - 205 lbs).