Pneumatization of an immature azhdarchoid pterosaur

摘要: Abstract The partial skeleton of an immature azhdarchoid pterosaur from the Santana Formation (Early Cretaceous) NE Brazil is described, where breaks across several three dimensionally preserved postcranial elements have permitted thickness cortex to be accurately measured. Air-space proportions (ASP) are shown comparable those observed in sauropod dinosaurs. pterosaurian pneumatic system, prevalent throughout these animals, well developed even non-adult animals and inferred penetrated into smallest bones.