Bilaterian Evolution (image) Okinawa Institute of Science and Technology (OIST) Graduate University Share Print E-Mail Caption The evolutionary relationships between the bilaterians, in which conserved molecular programs for head patterning are shown in orange. Credit Okinawa Institute of Science and Technology Graduate University Usage Restrictions Images are free for anyone to re-use, and should be credited to OIST. 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.