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Diagnostic features

Unbranched filamentous chlorophyte with cell walls consisting of overlapping H-shaped sections of variable thickness (can be difficult to see in some species). Each cell contains a single, net-like, deep green chloroplast. Red pigment is commonly visible in a lens-like cavity between cells.  Cells wider, greener and more square than in Tribonema.

Typical habitats

Found in streams and rivers of moderate to good water quality


Kingdom Plantae
Phylum Chlorophyta
Class Ulvophyceae
Order Ulotrichales
Family Microsporaceae
Common name Green algae