<em>Dwykaselachus oosthuizeni</em> Reconstruction (IMAGE) University of Chicago Medical Center Caption This image shows a reconstruction of Dwykaselachus oosthuizeni, a type of symmoriid shark now known to be an early chimaera. Credit Kristen Tietjen 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.