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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, cell body 115 μm long, 8 μm wide, x 640, Okubo Ryoke (picnic-no-mori), Akigase park, Saitama city, Saitama Pref., Japan, April 17, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euglena acus Euglena acus

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