Family: Unicells; cell wall separating into two parts (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

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H. maeandrocystis cell μm test 19 x 14 μm Watarase Wetland Fujioka Tochigi, 2005

Hemitoma sp. ? cell 14 x 11 μm Hazama marsh Ashikaga Tochigi, 2006

Similar genus -->> Phacotus; Coccomonas;

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