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Diagnostic features

Sheathed, tapering heteropolar blue-green filaments lacking heterocytes and akinetes. False branching rare. Sheath extends well beyond terminal cells, which are attenuated to colourless hair-like cells. Similar to Ammatoidea, but with heteropolarity.

Typical habitats

Streams of moderate to good water quality

Classification

Kingdom Bacteria
Phylum Cyanobacteria
Class Cyanophyceae
Order Oscillatoriales
Family Homoeotrichaceae
Common name Cyanobacteria