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

Penium rufescens
Cleve
= Actinotaenium rufescens (Cleve) Teiling

Penium rufescens Species: Cell body cylindrical, medium in size, both ends broadly rounded, (56-65)-80 μm long, 20-31 μm wide, L/W=2-2.5; cell wall thick, densely dotted, transparent or brownish in color (Illustrations of The Japanese Fresh-water Algae, 1977).

Penium rufescens Cleve, cell body 70 μm long, 26 μm wide, x 640, Omine-numa (pond/marsh), Tsukiyono town, Gunma Pref., Japan, September 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Penium rufescens Penium rufescens

Penium rufescens Cleve: Vegetative cells cylindrical, L/W = 2-2.5, (56-65) -80 μm long, 20- (24-25) -31 μm diam., cell wall thick, slightly constricted at middle (Illustrations of The Japanese Fresh-water Algae, 1977).

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