<I>Skeletonema</I> (IMAGE) University of Gothenburg Caption Skeletonema is a common bloom-forming diatom. Magnified 10,000 times by electron microscocopy. This picture adorns the cover of the printed version of PNAS # 10/ 2011. Credit Lars Edler and Gustaaf Hallegraff 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.