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Chlorophyceae: Volvocales: Astrephomenaceae (or Volvocaceae)
Volvocica: Volvocina: Astrephomenaceae

Pocock 1954

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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Astrephomene gubernaculifera
A. gubernaculifera
col. μm
cell μm
flag. μm
Chiba, 2003
Astrephomene gubernaculifera
A. gubernaculifera
col. 78 μm
cell μm
near Town Hall
Saitama, 2004
A. perforata
col. 112 x 98 μm
cell 10 μm
near Oyomi marsh
Nagano, 2004
Astrephomene ?
col. 24 μm
cell 4.5 μm
flag. 15 μm
Gunma, 2001
Similar genus -->> Volvulina; Eudorina;

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