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Diagnostic features

Unicellular desmid with two rounded semicells separated by an isthmus or constriction. The semi-cells may have a somewhat triangular or trapezoidal outline with a bumpy surface. Each semicell contains a green chloroplast with pyrenoids.

Typical habitats

Common in wetlands and other slow-flowing shallow habitats


Kingdom Plantae
Phylum Charophyta
Class Zygnemophyceae
Order Desmidiales
Family Desmidiaceae
Common name Green algae