Coconut Rhinoceros Beetle on Cycad (IMAGE) University of Guam Caption Coconut rhinoceros beetle adult and frass extracted from a burrow within the cataphylls of a Cycas micronesica stem apex. Cycad cataphylls are modified leaves designed to protect the massive stem apex. Credit University of Guam Western Pacific Tropical Research Center 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.