Hatzegopteryx ("Haţeg basin wing") is a genus of azhdarchid pterosaur, known from incomplete remains found in Transylvania. The skull fragments, left humerus, and other fossilized remains indicate a huge animal with a wingspan of 12 meters (40 ft) or more. It is known from only the type species, Hatzegopteryx thambema. The generic name derives from the Hatzeg (or Haţeg) basin of Transylvania where the bones were found, and from the Greek pteryx, or 'wing'. The specific name thambema derives from the Greek for 'monster', in reference to its huge size.