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Gamophyceae: Desmidales: Desmidaceae or Peniaceae
(Charophyceae: Zygnematales: Desmidaceae)

Penium polymorphum
Perty

Penium polymorphum Species: Cell body cylindrical or ellipsoidal, tapered to both ends, 35-79 μm long, (16-21)-36 μm wide; both ends broadly rounded; cell wall thin, brownish in color, finely lined (15-18/10 μ) (Illustrations of The Japanese Fresh-water Algae, 1977).

Penium polymorphum Perty, cell body 70 μm long, 32 μm wide, L/W=2.2, x 640, No.5, Shimo-Kenashitai (marsh), Hakkoda mountain, Aomori city, Aomori Pref., Japan, September 13, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Penium polymorphum
Cell body (left) 70 μm long, 29 μm wide, L/W=2.4, cell body (right) 62 μm long, 28 μm wide, L/W=2.2, x 640
Penium polymorphum Penium polymorphum Penium polymorphum
Cell body 72 μm long, 30 μm wide, L/W=2.4, x 640
Penium polymorphum Penium polymorphum

Images of collecting locality: No.5, Shimo-Kenashitai (marsh), Hakkoda mountain, Aomori city, Aomori Pref., Japan, September 13, 2006 by Y. Tsukii

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