Ironclad Beetle's Medial Suture (IMAGE) University of California - Irvine Caption A cross section of the medial suture, where two halves of the diabolical ironclad beetle's elytra meet, shows the puzzle piece configuration that's among the keys to the insect's incredible durability. Credit Jesus Rivera / UCI 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.