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Gamophyceae: Desmidales: Desmidiaceae
(Charophyceae: Zygnematales: Desmidiaceae)

Desmidium swartzii
(C. Agardh) C. Agardh ex Ralfs var. swartzii

Desmidium swartzii Genus: Cell body short, with a deep constriction at the center, apical view fusiform or radially symmetrical; cell apexes without spiny projections; intermediate zone or folded structure appeared during cell division; zygospores remain within their mother cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Cell body constricted in the middle, sinus narrow-linear part but acutely open outward, 11-22 μm long, 24-39 μm wide, L/W=2, constriction 21-28 μm wide; vertical view of cells triangular, sides straight, angles rounded; apex broad, with a short connecting process at each apical angle, excavated in the middle and forming a oblong hollow cavity between the adjacent cells; semicells transversely subrectangular, lateral margins obliquely truncate; filaments twisted (Photomicrographs of the Freshwater Algae, vol. 1, 1984).


Desmidium swartzii (C. Agardh) C. Agardh ex Ralfs var. swartzii (or Desmidium greville ?), cell body 18 μm long, 29 μm wide, L/W=0.6, x 200, x 400, x 640, No.1, Kejo-numa, Furukawa-Ono, Osaki city (formerly Furukawa city), Miyagi Pref., Japan, October 29, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Desmidium swartzii Desmidium swartzii Desmidium swartzii Desmidium swartzii

Images of collecting locality: No.1, Kejo-numa, Furukawa-Ono, Osaki city (formerly Furukawa city), Miyagi Pref., Japan, October 29, 2006 by Y. Tsukii


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