Chlorophyceae:
Chlorococcales: Dictyosphaeriaceae
Selenodictyum sp.
Genus: Planktonic; colony of 16 (or more) cells within a thin gelatinous sheath; cell body sickle-shaped,
connected with each other by gelatinous filaments and arranged at the periphery of the sheath;
a single chloroplast plate-like, with a pyrenoid
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:
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Selenastrum;
Kirchneriella
Selenodictyum sp. (similar to Kirchneriella contorta (Schmidle) Bohlin (G.E. Dillard, 1989)),
cell body μm long, μm wide,
x 640, Otto-Numa (pond) Chosei-chi, Tsuchiura city, Ibaraki Pref., Japan, July 2002 by Y. Tsukii
50 μm
100 μm
150 μm; x 400
Selenodictyum lunaris (Kirchner) Moebius:
Colonies of 4-32 cells within a gelatinous matrix, cells crescent in shape,
termini rounded, 8-12 μm long,
3-6 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
Selenodictyum obesa (W. West) Schmidle:
Similar to K. lunaris but more spherical,
5-6 μm diam.
(Illustrations of The Japanese Fresh-water Algae, 1977).
Selenodictyum acuminata Hirose et Akiyama:
Colonies within a gelatinous matrix, cells crescent in shape,
termini tapered, 25-30 μm long,
8-10 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
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