Annotated Diatom Micrographs. Ed. by Horst Lange - Bertalot. Volume 25: Metzeltin, Ditmar und Horst Lange - Bertalot: The genus Didymosphenia M. Schmidt. A critical evaluation of established and description of 11 new taxa. 2014. 126 pls. 293 p. gr8vo. Hardcover. (ISBN 978-3-87429-458-4)