Desmids

Desmids are the Desmidiales class of green algae, comprise around 40 genera and more than 10000 species, found mostly but not exclusively in freshwater. Most are unicellular, and are divided into two compartments separated by a narrow bridge or isthmus. Desmids assume a variety of highly symmetrical and generally attractive shapes, which provide the basis for their classification. Each has a single chloroplast, and n...