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

Penium margaritaceum
(Ehrenberg) Brébisson in Ralfs 1848
(Ehrenberg) Brébisson (Algaebase)

Species: Cell body cylindrical, slightly depressed at center, 68-185 μm long, 14-22 μm wide; chloroplasts with longitudinal ridges; cell wall with small granules arranged longidudinally or sometimes irregularly; zygospores spherical or slightly elongated (Photomicrographs of the Fresh-water Algae, 1985).
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Penium margaritaceum
P. margaritaceum
153,193 x 21,22 μm
L/W= 7.3,8.8
Maimeno-ike
Norikura highland
Nagano, 2006
Penium margaritaceum
P. margaritaceum
202 x 23 μm
L/W= 8.8
Azami-ike
Norikura highland
Nagano, 2006
Penium margaritaceum
P. margaritaceum
159 x 28 μm
L/W= 5.7
Kotoku-numa
Nikko
Tochigi, 2006
Penium
P. margaritaceum
168 x 24 μm
144 x 22 μm
L/W= 6.5-7.0
Hiroshima, 1998
Movies
Penium
P. margaritaceum
195 x 24 μm
L/W= 8.0
Saitama, 1999
Penium
P. margaritaceum
92 x 22 μm
101 x 22 μm
130 x 22 μm
L/W= 4.2-5.9
Saitama, 1999
Penium
P. margaritaceum
130 x 24 μm
145 x 19 μm
131 x 19 μm
203 x 17 μm
96 x 20 μm
Tsukuba
Ibaraki, 2000

P. margaritaceum
stock Ikk-2, axenic
117-140 x 20 μm
L/W= 5.9-7.1
Kaga
Ishikawa, 2000
Penium margaritaceum
P. margaritaceum
stock Ikk-2, axenic
conjugation
Kaga
Ishikawa, 2000
Penium
P. margaritaceum
stock Ikk-1
Cell division
Kaga
Ishikawa, 2000
Penium margaritaceum
P. margaritaceum
stock Ffu-2
94 x 20 μm
Umi-no-nakamichi
Fukuoka, 2001
Penium margaritaceum
P. margaritaceum
177 x 21 μm
Kasuga
Fukuoka, 2001
Penium margaritaceum
P. margaritaceum
89 x 28 μm
Kayoicho-ike
Fukuoka, 2001
Penium
P. margaritaceum
stock Tts-1
Cell division
Showa Memorial p.
Tokyo, 2001
Penium margaritaceium
P. margaritaceum
μm
Michi-no-eki
Tsukiyono
Gunma, 2003
Penium margaritaceium
P. margaritaceum
μm
Numappara marsh
Kuroiso
Tochigi, 2003
Penium margaritaceum
P. margaritaceum
μm
Mizuko
Fujimi
Saitama, 2003
Penium margaritaceum
P. margaritaceum
120-150 x 20-22 μm
Iruma river
Sayama
Saitama, 2004
Penium margaritaceum
P. margaritaceum
168 x 27 μm
near City Hall
Fujimi
Saitama, 2004
Penium margaritaceum
P. margaritaceum
194 x 27 μm
Kahan koen
Kuroiso
Tochigi, 2004
Penium margaritaceum
P. margaritaceum
126 x 23 μm
L/W=5.5
Higashi-sano
Hakuba
Nagano, 2004
Penium margaritaceum
P. margaritaceum
132 x 21 μm
L/W=6.3
Higashi-sano
Hakuba
Nagano, 2004
Penium margaritaceum
P. margaritaceum
135 x 22 μm
L/W=6.1
Tsukamoto
Sakura-ku
Saitama, 2004
Penium margaritaceum
P. margaritaceum
155 x 19 μm
Kusatsu Onsen b.t.
Kusatsu
Gunma, 2005
Penium margaritaceum
P. margaritaceum
155 x 19 μm
Kashibaru m.6
Karatsu
Saga, 2006
Penium margaritaceum
P. margaritaceum
μm
n. Yamakado m.
Nishi-Azai
Shiga, 2008
Penium
P. margaritaceum
μm
n. Yamakado m.
Nishi-Azai
Shiga, 2008
Penium margaritaceum
P. margaritaceum
μm
n. Lake Nakatsuna
Omachi
Nagano, 2008

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Penium
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