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Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum iotanum
var. longatum Teiling

Staurastrum 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: with arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)

Species [var. tortum]: Cell body with 2 arm-like projections, 11 μm long (excluding arms), 28 μm long (including arms), 28 μm wide (including arms), isthmus 4 μm wide.
[var. longatum]: 38.7 μm long, 43 υm wide (Illustrations of The Japanese Fresh-water Algae, 1977)


Staurastrum iotanum var. longatum Hirano ?, cell body 10 μm (excluding arms), 9 μm wide (excluding arms), 38 μm wide (including arms), arms 23 μm long, x 400, x 640, Shinobazu-ike (pond), Ueno, Taito-ku, Tokyo, Japan, March 2001 by Y Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum


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