Fig 1 (IMAGE) University of Bristol Caption Diagram showing rates of evolution of lower jaw shape across the ‘family tree’ of lepidosaurs. Credit Dr Antonio Ballell Mayoral and colleagues Usage Restrictions once with release License Original 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.