Brazil's biggest ever flying dinosaur fossil The biggest flying reptile fossil ever found in Brazil - 8.2 metres from wing tip to wing tip - was presented to the public in Rio's National Museum on Wednesday. The Museum will host a International Congress on Pterosaurs in May. Scientists say the specimen is a "Tropeognathus mesembrinus", of the "Anhangueridae" family, of which fossils are on average 7 metres wide. Images and soundbites.