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Gamophyceae: Desmidales: Mesotaeniaceae
(Charophyceae: Zygnematales: Mesotaeniaceae)

 Netrium oblongum
(De Brary) Lütkemüller var. oblongum

Netrium oblongum Species [ var. oblongum ]: Cell body cylindrical ellipsoid, both ends broadly rounded; laminae of chloroplasts deeply dented showing circular depressions; 108-148 μm long, 27-39 μm wide, L/W=3-4.
[ var. cylindricum W. et G.S. West ]: Smaller than var. oblongum; 60-90 μm long, 17-25 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Netrium oblongum (De Brary) Lütkemüller var. oblongum cell body 153 μm long, 34 μm wide, L/W=4.5, x 640, No.1, Chigo-ike marsh (or Yakebitai marsh) at the top of Yakebitai mountain, Shiga highland (Oku-shiga highland), Yamanouchi town, Nagano Pref., Japan, July 20, 2008 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Netrium oblongum Netrium oblongum

Netrium oblongum (De Brary) Lütkemüller var. oblongum cell body 123 μm long, 35 μm wide, L/W=3.5, x 640, No.4, Chigo-ike marsh (or Yakebitai marsh) at the top of Yakebitai mountain, Shiga highland (Oku-shiga highland), Yamanouchi town, Nagano Pref., Japan, July 20, 2008 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Netrium oblongum Netrium oblongum

Images of collecting locality: Chigo-ike (marsh pond) at the top of Yakebitai mountain, Shiga highland (Oku-shiga highland), Yamanouchi town, Nagano Pref., Japan, July 20, 2008 by Y. Tsukii

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