The Pterosaurian Sector is an area of the Jurassic Quadrant that is home to the pterosaurs, a group of flying reptiles. Planets here include Dimorphia, Squawk Minor, and the main world in the Pterosaurian Sector, Squawk Major. The leader of this part of space is the High Flapper. The Pterosaurian Sector as a whole seems to be on friendly terms with the DSS. The majority of The Skies of Fear, a book in the Astrosaurs series, is set here.