Segment of Lizard Jawbone (IMAGE) University of Iowa Caption This image shows a small portion of the jawbone of Barbaturex morrisoni. Credit (Photo: Craig Chandler, University of Nebraska-Lincoln, University Communications.) 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.