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Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum avicula
Brébisson in Ralfs 1848

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 [var. avicula ]: Cell body 21-26 μm long, 22.4-26 μm wide, isthmus 7-8.6 μm wide
[var. subarcuatum (Wolle) W. et G.S. West ]: Cell body 21-31 μm long, 19.6-31 μm wide, isthmus 7-11 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977)
Google Image Search
Staurastrum avicula
S. avicula
v. subarcuatum
24 x 30 μm
Numappara marsh
Kuroiso
Tochigi, 2003
Cosmarium avicula
S. avicula
v. subarcuatum ?
24 x 26 μm
Higashi-sano
Hakuba
Nagano, 2004
Staurastrum avicula
S. avicula
v. subarcuatum
24 x 26 μm
Karakemi marsh
Omachi
Nagano, 2006
Staurastrum
S. avicula
v. subarcuatum
25 x 25 μm
Dojo-ike
Norikura highland
Nagano, 2006
Staurastrum avicula
S. avicula
v. subarcuatum
μm
Dojo-ike
Norikura highland
Nagano, 2007
Staurastrum avicula
S. avicula
v. subarcuatum
21 x 21 μm
Maimeno-ike
Norikura highland
Nagano, 2006
Staurastrum avicula
S. avicula
v. subarcuatum
24 x 28 μm
Kashibaru marsh 5
Karatsu
Saga, 2006
Staurastrum
S. avicula
v. subarcuatum
27 x 27 μm
Nozomiko 2
Myoko-kogen
Nagano, 2007
Similar species -- >> S. subavicula;

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Staurastrum avicula
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