The Pterosaur Ghosts are ghosts what appears to be those in the Pterosaur family.
On Winston Zeddemore's first day as a Ghostbuster, the team was called to the Natural History Museum to deal with the Pterosaur Ghosts in the Dinosaurs exhibit. They proved agile and fast... and slimy. While the others recovered, Winston threw out several Traps at once and activated them. The ghosts were wrangled by the others and trapped.