Family: Colonies consisting of a fixed number of cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Colony spherical in shape, consisting of 64 or 32 cells arranging at its perphery; a large inner cavity present; each cell embedded within a gelatinous matrix; four small asexual (somatic) cells located at the posterior end of the colony; with two flagella; chloroplast cup-shaped; pyrenoids absent; stigma conspicous, located at anterior half of the cell body; 3 or 4 contractile vacoules anterior (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

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A. gubernaculifera col. μm cell μm flag. μm Naruto Chiba, 2003

A. gubernaculifera col. 78 μm cell μm near Town Hall Shobu Saitama, 2004

A. perforata col. 112 x 98 μm cell 10 μm near Oyomi marsh Hakuba Nagano, 2004

Astrephomene ? col. 24 μm cell 4.5 μm flag. 15 μm Tatebayashi Gunma, 2001

Similar genus -->> Volvulina; Eudorina;

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