Arthropod Species Found on the Alder Trees (image) Hokkaido University Share Print E-Mail Caption Some of the arthropod species found on the alder (Alnus hirsuta) trees. Photos taken by Shunsuke Utsumi. Credit Shunsuke Utsumi Usage Restrictions This set of images is copyrighted by Shunsuke Utumi and can be used for reporting this press release without asking for a permission if appropriately credited. Share Print E-Mail 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.