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Chlorophyceae: Chlorococcales: Dictyosphaeriaceae

 Selenodictyum sp.

Selenodictyum 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:
Similar Genus -->> Selenastrum; Kirchneriella

Selenodictyum ?, cell body strongly curved, about 16 μm long, 2 μm wide, tapered at both ends, x 640, Nasu, Tochigi Pref., Japan, 2001 collected by H. Shiomizu, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Selenodictyum Selenodictyum

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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