Genus: Cell body cylindrical; each cell wall consists of two parts with "H" structure
overlapping at the midregion; chloroplasts many, disc-shaped, without pyrenoids
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:
Filament 6-7 μm wide; cell body 2-3 times longer than its width;
2-4 parietal chloroplasts
(Süßwasserflora von Mitteleuropa 3, Xanthophyceae 1, 1978).
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