摘要
IN the study of brain structures of pterosaurs, the traditional method is to study their naturallyexposed braincase (e. g. ? Pteranodon) or endocasts formed by matrix filling the cranialcavity after the surrounded bones were removed by artificial means (e. g. Scaphognathus pur-doni). Up to now, we only have the information on the brain structures from a fewpterosaurs: Scaphognathus purdoni, Rhamphorhynchus, Pteranodon and Ptero-dactylus. Apparently, these methods have great limitations. On the one hand, it is diffi-
