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

 Netrium digitus
(Nägeli) Itzigsohn et Rothe var. digitus

Netrium digitus Species [var. digitus]: Cell body 130-300 μm long, 40-84 μm wide, L/W = 3-4; cell wall smooth.
[var. lamellosum]: Longer than v. digitus, both sides parallel; cell body 140-416 μm long, 32-60 μm wide, L/W = 5-8.
[var. naegelii]: Smaller than v. digitus, both ends broadly rounded; cell body 100-200 μm long, 25-36 μm wide, L/W = 4-5.
[var. rectum]: Larger than v. digitus, tapered to both ends; cell body 300 μm long, 48 μm wide, L/W = 6.3 (Illustrations of The Japanese Fresh-water Algae, 1977).

Netrium digitus (Nägeli) Itzigsohn et Rothe var. digitus, cell body 169 μm long, 66 μm wide, L/W=2.6, x 640, No.1, a small marsh pond at North East of Hachimantai mountain top, Hachimantai city, Iwate Pref., Japan, August 23, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Netrium digitus Netrium digitus Netrium digitus

Images of collecting locality: No.1, a small marsh pond at North East of Hachimantai mountain top, Hachimantai city, Iwate Pref., Japan, August 23, 2007 by Y. Tsukii

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