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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 133 μm long, 33 μm wide, L/W=4.0, x 640, No.8, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, June 4, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Netrium oblongum Netrium oblongum
Cell body 160 μm long, 34 μm wide, L/W=4.7, x 400, x 640
Netrium oblongum Netrium oblongum
Cell body 122 μm long, 35 μm wide, L/W=3.5, x 400, x 640
Netrium oblongum Netrium oblongum Netrium oblongum

Images of collecting locality: No.8, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, June 4, 2007 by Y. Tsukii

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