<i>Ichthyostega</i> Tetrapod (IMAGE) European Synchrotron Radiation Facility Caption This is an artist's impression of an Ichthyostega tetrapod, with the cut-out showing the 3-D reconstruction of two vetrebrae from the study. Credit Julia Molnar 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.