Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum lapponicum
(Schmidle) Grönblad

Genus: Cell body short, radiate in shape; apical view of the cell, triangular, polygonal, ellipsoidal or spindle-shaped; zygospores formed outside of mother cells (Illustrations of The Japanese Fresh-water Algae, 1977)
Subgenus: lacks arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)

Species: Cell body 28-42 μm long, 28-39 μm wide; constriction 8.4-11 μm wide; cell wall covered with granules, arranging in circle around each projection; semicells not twisted with each other at isthmus (Illustrations of the Fresh-water Algae, 1977).
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Staurastrum lapponicum
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