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Dinophyceae: Gymnodiniales: Gymnodiniaceae
Dinoflagellida: Diniferina: Gymnodiniidae

 Gymnodinium ordinatum
Skuja, 1939

Gymnodinium Genus: Epicone (or epitheca) consists of 10-16 thecal plates; hypocone (or hypotheca) of 6-7 thecal plates (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: (An Illustrated Guide to the Freshwater Zooplankton in Japan, 2000).

Gymnodinium ordinatum Skuya, 1939?, chloroplast absent ?, cell body 20 μm long, 17 μm wide, x 400, Japan 199? by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Glenodinium

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