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Chlorophyceae: Chlorococcales: Oocystaceae

Ankistrodesmus falcatus
(Corda) Ralfs

Ankistrodesmus Genus: Colonies of 4-32 cells; cell body long crescent or spindle in shape, tapered at both ends; cells attached with each other at the center of the body, paralleled or radially arranged; no gelatinous sheath; a chloroplast; no pyrenoids; planktonic (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Cell body needle-shaped, tapered to the sharply pointed ends, slightly twisted or curved, 25-100 μm long, 1.5-6 μm wide; a single chloroplast parietal, plate-like, usually without pyrenoids (Photomicrographs of the Freshwater Algae, 1985). 25-30 μm long, 2-3 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar Genus ->> Monoraphidium; Selenastrum;


Ankistrodesmus falcatus (Corda) Ralfs, cell body μm long, μm wide, L/W=, x 640, No.11, Kannon-numa Forest Park (pond), Shimogo town, Fukushima Pref., Japan, November 15, 2008, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Ankistrodesmus falcatus Ankistrodesmus falcatus

Images of collecting locality: No.11, Kannon-numa Forest Park (pond/marsh), Shimogo town, Fukushima Pref., Japan, November 15, 2008, by Y. Tsukii


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