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Euglenophyceae: Euglenales
Mastigophora: Euglenida

 Euglena gigas
Drezepolski
= Euglena helicoidea

Euglena gigas Species: 198-360 μm long, 20-40 μm wide; long cylindrical, somewhat flattened and slightly-twisted; anterior end rounded, posterior end pointed; numerous discoid chloroplasts; many rod-shaped paramylon (paramylum) bodies; no pyrenoids; nucleus big, cylindrical, lying in the center; stigma large (Zakrys, 1986).

Euglena gigas, cell body 360 μm long, 48 μm wide, L/W=7.5, x 200, x 400, x 640, Futayo-no-ike (pond) near Haguro mountain, Haguro town, Yamagata Pref., Japan, July 10, 2005 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
Euglena gigas Euglena gigas Euglena gigas Euglena gigas

Ref: Drezepolski (1925) Kosmos, 50: 243.

Zakrys, B. (1986) Contribution to the monograph of Polish members of the genus Euglena Ehrenberg 1830, Nova Hedwigia, 42: 491-540.

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