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Euglenophyceae: Euglenales
Mastigophora: Euglenida: Euglenina

 Euglena acus
Ehrenberg, 1830

Euglena acus Species: 50-175 μm long, 8-18 μm wide; body long spindle or cylindre, with a sharply pointed posterior end; numerous discoid chloroplasts; several paramylon (paramylum) bodies; nucleus central; stigma distinct; flagellum short, about one-fourth the body length (Kudo, 1966).
Similar species -->> Cyclidiopsis; E. limnophila;

Euglena acus Ehrenberg 1830, cell body 291 μm long, 10 μm wide, chloroplasts small, ellipsoidal, 4 μm long, 2.5 μm wide, paramylon bodies rod-shaped, 22-25 μm long, x 640, Shikinawa-ike (pond, near Kayoicho Park), Kasuya town, Fukuoka Pref., Japan, October 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euglena acus Euglena acus Euglena acus
Euglena acus Euglena acus Euglena acus

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