Phaeodactylum Tricornutum (IMAGE) U.S. National Science Foundation Caption Micrograph of the fusiform morphotype of the diatom Phaeodactylum tricornutum. Credit Alessandra De Martino, Ecole Normale Superieure, Paris 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.