1. Extinct flying reptile of the Mesozoic era, with membranous wings supported by an elongated fourth finger
   "Pterosaurs were the first vertebrates to evolve powered flight";
   - flying reptile

Derived forms: pterosaurs

Type of: archosaur, archosaurian, archosaurian reptile

Part of: order Pterosauria, Pterosauria

Encyclopedia: Pterosaur