Collecting Stoneflies (IMAGE) The University of Montana Caption FLBS summer intern Grant Marshall holds benthic Pteronarcys californica stoneflies found in surface waters of the Nyack floodplain. Credit UM photo 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.