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Chlorophyceae: Tetrasporales: Palmellopsidaceae
Chlamydophyceae: Tetrasporales: Palmellopsidaceae

 Sphaerocystis sp.

Sphaerocystis Genus: Colonies small, spherical or aggregates in shape; sheath inconspicuous or absent; cell body spherical in shape; chloroplasts cup-shaped or plate-like (Illustrations of the Japanese fresh-water algae, 1977).
Species:

Sphaerocystis sp. (or Gloeocystis sp. ?), cell body μm long, μm wide, x 640, near Eai-gawa (Eai river), Ishinazaka, Furukawa city, Miyagi Pref., Japan, November 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
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Sphaerocystis schroeteri Chodat: Colonies sherical in shape, consisting of 4-16 cells, 30-80 μm in diam.; cell body spherical, 5-12 μm in diam.; a single chloroplast cup-shaped with a pyrenoid (Illustrations of the Japanese fresh-water algae, 1977).

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