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Chlorophyceae: Chlorococcales: Micractiniaceae

 Golenkinia sp.

Golenkinia Genus: Unicellular, but autospore may become temporary colonical; planktonic; cell body spherical with many elongated spiny projections; a single chloroplast cup-shaped, with a single pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Vegetative cells spherical, 8-10 μm diam., with short spines 20-40 μm long, 1 chloroplast cup-shaped, 1 pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar genus --> Franceia; Acanthosphaera; Micractinium; Errerella; Chodatella;

Golenkinia sp. (or Franceia ??), culture with Hyponex and KCM, cell body spherical, 8-16 μm diam., with spines ~30 μm long, x 640, Karasugamori, Nishinasuno town, Tochigi Pref., Japan, 2001 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400

Daughter cells

* Golenkinia radiata (Chodat) Wille: Vegetative cells spherical, 8-10 μm diam., with short spines 20-40 μm long, 1 chloroplast cup-shaped, 1 pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).

Golenkinia paucispina W. et G. S. West: Vegetative cells spherical, 10-18 μm diam., with many short spines 15-20 μm long, 1 chloroplast cup-shaped, 1 pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).

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