Geosternbergia

Geosternbergia from the Late Cretaceous geological period of North America, was one of the largest pterosaur genera and had a wingspan of up to 7.25 metres (23.8 ft).

The Lost World: Jurassic Park Edit
Proven to be on the island by Roland’s Dinosaur guide, the trailer’s screensaver, and in several drawings and models made for the movie we can see photo evidence of it but it is never seen alive on film in any scene. It has been suggested that the intended use was for this species to be the male sexually-dimorphic version of the P. longiceps species seen at the end of The Lost World: Jurassic Park where science would say otherwise.