<i>Orthacanthus</i> Tooth (IMAGE) Trinity College Dublin Caption The tooth of Orthacanthus in oral view. Credit Aodhán Ó Gogáin (Trinity College Dublin) Usage Restrictions Please credit the source. 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.