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: Cell body μm long (excluding spines), μm (including spines), μm wide, isthmus μm wide (Illustrations of The Japanese Fresh-water Algae, 1977)
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S polymorphum
v. groenbladii
17 x 30 μm
Shimo-Kenashitai 1
Hakkoda mountain
Aomori, 2006
S polymorphum
v. groenbladii
17 x 20 μm
Sukawa highland
Kurikoma mt.
Akita, 2007
S polymorphum
v. groenbladii
18 x 25 μm
Mida-ga-hara 9
Gassan (mt)
Yamagata, 2006
S polymorphum
v. groenbladii
16 x 27 μm
Mida-ga-hara 7
Gassan (mt)
Yamagata, 2006
S polymorphum
v. groenbladii
16 x 24 μm
Midagahara 4
Tateyama
Toyama, 2006
S polymorphum
v. groenbladii
?? x 23 μm
Midagahara 7
Tateyama
Toyama, 2006
S polymorphum
v. groenbladii
16 x 27 μm
Shimo-no-koike
Shiga highland
Nagano, 2004
S polymorphum
v. groenbladii
15 x 23 μm
Shimo-no-koike
Shiga highland
Nagano, 2006
S polymorphum
v. groenbladii
μm
Shijuhachi-ike 4
Shiga highland
Nagano, 2007.6
S polymorphum
v. groenbladii
μm
Shijuhachi-ike 3
Shiga highland
Nagano, 2008
S polymorphum
v. groenbladii
18 x 25 μm
J Skunk Cabbage m
Tsugaike highland
Nagano, 2006