Planthopper species (IMAGE) University of Hawaii at Manoa Caption The cave-adapted planthopper species Oliarus polyphemus is only found in lava tubes on Hawaiʻi Island. Credit (Photo credit: Michael E. Slay) Usage Restrictions none License Original 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.