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

Netrium digitus
(Nägeli) Itzigsohn et Rothe var. 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).
Google Image Search
N. digitus var. digitus, L/W=3-4
Cell body more than 200 μm long
Netrium digitus
v. digitus
295 x 80 μm
296 x 84 μm
L/W=3.7
Komado marsh
Showa and Tajima
Fukushima, 2004
Netrium digitus
v. digitus
210 x 75 μm
L/W=2.8
Mizunashi-Yachi
Komado marsh
Fukushima, 2007
Netrium digitus
v. digitus
205-238 x μm
L/W=3.4-3.8
Shirakaba-Yachi
Komado marsh
Fukushima, 2007
Netrium digitus
v. digitus
202 x 72 μm
L/W=2.8
Miyatoko m.5
Minami-Aizu
Fukushima, 2008
Netrium digitus
v. digitus ?
282 x 72 μm
L/W=3.9
6 laminae ?
Kawaguchi Natural p.
Kawaguchi
Saitama, 2005
Netrium digitus
v. digitus
260 x 70 μm
L/W=3.7
laminae ?
Karakemi marsh
Yasaka
Nagano, 2005
Netrium
v. digitus
253 x 65 μm
L/W=3.9
laminae ?
U.S.A.?, 1999
Netrium digitus
v. digitus
235 x 70 μm
L/W=2.9-3.0
Oze-ga-hara
Katashina
Gunma, 2006
Netrium digitus
v. digitus
200-202 x 70-75 μm
L/W=2.7-2.9
Midagahara 5
Tateyama
Toyama, 2006
Netrium digitus
v. digitus
230 x 80 μm
L/W=2.9
Midagahara 2
Tateyama
Toyama, 2006
Netrium digitus
v. digitus
205 x 67 μm
L/W=3.1
Chigo-ike 2
Shiga highland
Nagano, 2006
Netrium digitus
v. digitus
245 x 85 μm
L/W=2.9
Chigo-ike
Shiga highland
Nagano, 2008
Netrium digitus
v. digitus
270 x 69 μm
L/W=3.9
Chigo-ike
Shiga highland
Nagano, 2008
Netrium digitus
v. digitus
202-211 x μm
L/W=2.9-3.0
6 laminae ?
Tanohara Natural p.
Ontake highland
Nagano, 2005
Netrium digitus
v. digitus
200 x 64 μm
L/W=3.1
laminae ?
Yoshigadaira marsh
Shirane mountain
Gunma, 2005
Netrium digitus
v. digitus
230 x 75 μm
L/W=3.1
laminae ?
Yumi-ike
Shirane mountain
Gunma, 2005
Netrium digitus
v. digitus
205-247 x μm
L/W=3.0-3.6
laminae ?
Kisuge konuma
Shimogo
Fukushima, 2005
Netrium digitus
v. digitus
180-209 μm
L/W=2.9-3.2
laminae ?
Ukishima marsh
Tsugaike highland
Nagano, 2005
Netrium digitus
v. digitus
242 x 77 μm
L/W=3.1
Ukishima marsh
Tsugaike highland
Nagano, 2006
Netrium digitus
v. digitus
184 x 60 μm
230 x 67 μm
L/W=3.1,3.4
J Skunk Cabbage m.
Tsugaike highland
Nagano, 2006
Netrium digitus
v. digitus
238 x 71 μm
L/W=3.4
Kamino-tanbo
Tsugaike highland
Nagano, 2006
Netrium digitus
v. digitus
188, 248 x μm
L/W=3.1, 3.2
laminae ?
Ushidome-ike
Norikura highland
Nagano, 2005
Netrium digitus
v. digitus
227 x 80 μm
288 x 84 μm
L/W=2.8,3.4
Kenashitai
Hakkoda mountain
Aomori, 2005
Netrium digitus
v. digitus
227-280 μm
L/W=3.4-3.7
Kenashitai
Hakkoda mountain
Aomori, 2005
Netrium digitus
v. digitus
275,290 x μm
L/W=3.3
Kami-Kenashitai 3
Hakkoda mountain
Aomori, 2006
Netrium digitus
v. digitus
or v. naegelii ?
213 x 55 μm
L/W=3.9
6 laminae ?
Omine-numa
Tsukiyono
Gunma, 2003
Netrium digitus
v. digitus
280 x 88 μm
L/W=3.2
Ikenokochi m.5
Tsuruga
Fukui, 2006
Netrium digitus
v. digitus
268 x 82 μm
L/W=3.3
Sukawa highland
Kurikoma mt.
Akita, 2007
Netrium digitus
v. digitus
300 x 84 μm
L/W=3.6
East of Tojuro
Azuma mt.
Yamagata, 2007
Netrium digitus
v. digitus
195,200 x μm
L/W=2.9,3.2
East of Tojuro
Azuma mt.
Yamagata, 2007
Netrium digitus
v. digitus
300 x 84 μm
L/W=3.6
Yahei-daira 1
Azuma mt.
Yamagata, 2007
Netrium digitus
v. digitus
271-296 x μm
L/W=2.6-3.2
Iroha-numa
Azuma mt.
Yamagata, 2007
Netrium digitus
v. digitus
220 x 64 μm
L/W=3.4
Yamamuro m.1
Maibara
Shiga, 2008
Netrium digitus
v. digitus
290 x 81 μm
L/W=3.6
Sensho-ga-hara
Shizukuishi
Iwate, 2007
Netrium digitus
v. digitus
253 x 94 μm
L/W=2.7
Sensho-ga-hara
Shizukuishi
Iwate, 2007

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Netrium digitus
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