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Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum

Subgenus: Eustaurastrum
Section: Processiformes

Family: Cell wall with 2 or more partitions
Subfamily: Cell division occurs at central constriction

Genus: Cell body short, radiate in shape; apical view of the cell, triangular, polygonal, ellipsoidal or spindle-shaped; zygospores formed outside of mother cells.
Subgenus: with arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Section: Arm-like projections granulated or dented
4 arm-like projections
Staurastrum
Staurastrum sp.
μm
USA, 1999
Staurastrum
Staurastrum sp.
μm
USA, 1999
Staurastrum
Staurastrum sp.
μm
USA, 1999
Staurastrum
Staurastrum sp.
35 x 30 μm
USA, 1999
Staurastrum
Staurastrum sp.
μm
Japan, 1998
Staurastrum
S. crenulatum
v. crenulatum
μm
USA, 1999
Staurastrum
Staurastrum sp.
4 arms ?
μm
Japan, 1998
Staurastrum
S. bibrachatum
μm
Showa Memorial p.
Tokyo, 2001
Staurastrum bibrachatum
S. bibrachatum
31 x 32 μm
Univ. A.V.M.
Obihiro
Hokkaido, 2005
Staurastrum
S. dentatum
v. gracilis
?? x 35 μm
Iroha-numa 1
Zao mountain
Yamagata, 2006
Staurastrum
S. proboscideum
40 x 30 μm
Tenbo marsh
Tsugaike highland
Nagano, 2005
Staurastrum margaritaceum
S. margaritaceum
30 x 28 μm
Midagahara 3
Tate-yama
Toyama, 2006
Staurastrum margaritaceum
S. margaritaceum
32 x 23 μm
near Meigetsuso
Azuma mt.
Yamagata, 2007
Staurastrum
S. margaritaceum
μm
Yokotashiro
Katashina
Gunma, 2007
Staurastrum
S. margaritaceum ?
μm
near Hachimantai M.
Hachimantai
Iwate, 2007
Staurastrum rhynchoceps
S. rhynchoceps
μm
Tanohara m.3
Shiga highland
Nagano, 2007
Staurastrum
Staurastrum sp.
4 arms ?
μm
Sanda
Hyogo, 2001
Staurastrum
S. zonatum
v. zonatum
26 x μm
Kareki-numa
Nikko
Tochigi, 2008
Staurastrum
S. zonatum
v. emarginatum ?
26 x μm
Iroha-numa 2
Zao mountain
Yamagata, 2006
Staurastrum
S. zonatum
v. emarginatum ?
x 40 μm
Iroha-numa 3
Zao mountain
Yamagata, 2006
Staurastrum zonatum
S. zonatum
v. emarginatum ?
x 40 μm
Iroha-numa
Zao mountain
Yamagata, 2008
Staurastrum
S. polymorphum
v. pygmaeum ?
30 x 37 μm
Utsubo-numa
Zao Mt.
Yamagata, 2008

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Staurastrum
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