The following article from the Journal of Phycology, “Carotenoids, Mycosporine-Like Amino Acid Compounds, Phycobiliproteins, And Scytonemin In The Genus Scytonema (Cyanobacteria): A Chemosystematic Study,” submitted by Antonia D. Asencio, and published online on August 22, 2011 on Wiley Online Library (, has been retracted by agreement between the journal Editor, Robert Sheath, and Wiley Periodicals, Inc. The retraction has been agreed upon request by Ferran Garcia-Pichel, listed as co-author, but not having agreed to the submission or publication of the manuscript.