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

Penium margaritaceum
(Ehrenberg) Brébisson in Ralfs 1848

Penium margaritaceum 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).


Penium margaritaceum (Ehrenberg) Brébisson, cell body 130 μm long, 24 μm wide, L/W= 5.4, x 400, x 640, Tsukuba city, Ibaraki Pref., Japan, October 2000, collected by N. Kinoshita, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Penium interruptum Penium interruptum Penium interruptum

Penium interruptum, a dividing cell (?), cell body 145 μm long, 19 μm wide, L/W=7.6, x 400, x 640, Tsukuba city, Ibaraki Pref., October 2000, collected by N. Kinoshita, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Penium interruptum Penium interruptum Penium interruptum

Penium interruptum, a dividing cell (?), cell body 131 μm long, 19 μm wide, x 400, x 640, Tsukuba city, Ibaraki Pref., October 2000, collected by N. Kinoshita, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Penium interruptum Penium interruptum Penium interruptum Penium interruptum

Penium interruptum, a dividing cell (?), a dividing cell, cell body 203 μm long, 17 μm wide, x 400, x 640, Tsukuba city, Ibaraki Pref., October 2000, collected by N. Kinoshita, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Penium interruptum Penium interruptum
scale 31 μm scale 63 μm scale 94 μm; x 640
Penium interruptum Penium interruptum Penium interruptum Penium interruptum

Penium interruptum var. ?, cell body 96 μm long, 20 μm wide, x 400, x 640, Tsukuba city, Ibaraki Pref., October 2000, collected by N. Kinoshita, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Penium interruptum Penium interruptum Penium interruptum


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