Oikopleura dioica (IMAGE) University of Barcelona Caption This research group is a global pioneer in the study of the species Oikopleura dioica ─an organism of marine zooplankton from the appendicularian group─ as the animal model for studies from the perspective of evolutionary developmental biology. Credit UNIVERSITY OF BARCELONA Usage Restrictions Credit must be given to the creator. License CC BY 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.