<i>Corythomantis greeningi</i> Skull (IMAGE) Cell Press Caption This is the skull of a Corythomantis greeningi, (Greening's frog), showing spines. Credit Carlos Jared/Butantan Institute Usage Restrictions Credit Required. 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.