Euglenophyceae:
Euglenales
Mastigophora: Euglenida
Euglena gigas
Drezepolski
= Euglena helicoidea
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).
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Euglena gigas Drezepolski,
cell body 360 μm long, 33 μm wide, 8-9 striae within 10 μm,
stigma football-shaped, 12 μm long, 6 μm wide,
chloroplasts ellipsoidal, 7 μm long, 5 μm wide,
large paramylon bodies 46-50 μm long, 10 μm wide, 5 μm thick,
with many small granular paramylon bodies,
a nucleus elongated ellipsoidal, 66 μm long, 12 μm wide,
x 200, x 400, x 640, Otto-Numa (pond) Chosei-chi, Tsuchiura city, Ibaraki Pref., Japan, July 2002 by Y. Tsukii
50 μm
100 μm
150 μm; x 400
31 μm
63 μm
94 μm; x 640
Cell body slightly flattened with coverglass,
paramylon bodies changed from rod-shaped to ring-shaped, x 400, x 640
31 μm
63 μm
94 μm; x 640
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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