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

Penium spirostriolatum
Barker

Penium spirostriolatum Species: Cell body cylindrical, large in size, slightly constricted at the center, bands present, 77-325 μm long, 15-30 μm wide, L/W=5-10; cell wall brownish, striated (striae slighlty slanted) (Illustrations of The Japanese Fresh-water Algae, 1977).


Penium spirostriolatum Barker var. spirostriolatum, cell body 210 μm long, 22 μm wide, x 640, a pond near the entrance of climbing route to Omine mountain, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Penium spirostriolatum Penium spirostriolatum Penium spirostriolatum Penium spirostriolatum Penium spirostriolatum

Images of collecting locality: a pond near the entrance of climbing route to Omine mountain, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii


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