Fossil Hirmoneura messelense from the Messel Pit and extant Hirmoneura maculipennis. (IMAGE) University of Vienna Caption © Senckenberg Credit © Senckenberg 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.