The Skulls Of Three Hadrosaur Dinosaurs (IMAGE) University of Bristol Caption The skulls of three hadrosaur dinosaurs, <i>Lambeosaurus lambei (top left), Gryposaurus notabilis (top right), Parasaurolophus walkeri (lower)</i>. Credit Albert Prieto-Márquez. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.