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Chlorophyceae: Chlorococcales: Micractiniaceae

 Golenkinia radiata
(Chodat) Wille

Franceia 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 radiata ?, cell body sherical 11 μm in diam., hairy spines up to 26 μm long, x 400, x 640, October 1999, Shirakawa, Fukushima Pref., Japan, collected by H. Shiomizu, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Franceia Franceia

* 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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