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Gamophyceae: Zygnematales: Desmidiaceae

Euastrum affine
(Greville) Ralfs var. ??

Euastrum affine Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)

Species: Cell body elongated ellipsoidal, 98-117-(123) μm long, 53-64-(67) μm wide, L/W=2; semicells consisting of five lobes (one terminal, four lateral); bay opening between terminal and anterior lateral lobe is deep and narrow; anterior lateral lobes smaller than posterior one; posterior lobes with slight depressions; terminal lobe laterally extended and apically flattened; semicell with 5 bulges (2 anterior, 3 posterior), 1 pore present between the anterior bulges (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar genus -->> E. affine, E. humerosum, E. pinnatum


Euastrum affine (Greville) Ralfs var. affine, cell body 147 μm long, 75 μm wide, L/W=2.0, isthmus 20 μm wide, x 640, Azami-ike (pond), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum Euastrum
Cell body 145 μm long, 74 μm wide, L/W=2.0, isthmus 20 μm wide, x 640
Euastrum Euastrum
Cell body 140 μm long, 71 μm wide, L/W=2.0, isthmus 19 μm wide, x 640
Euastrum Euastrum Euastrum
Cell body 140 μm long, 71 μm wide, L/W=2.0, isthmus 18 μm wide, x 640
Euastrum

Euastrum affine (Greville) Ralfs var. affine, cell body 147 μm long, 78 μm wide, isthmus 24 μm wide, x 400, x 640, Azami-ike (pond), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii
Euastrum affine Euastrum affine Euastrum affine Euastrum affine

Images of collecting locality: Azami-ike (pond), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii


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