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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Phacus longicauda
(Ehrenberg) Dujardin 1841

Phacus longicauda Genus: Highly flattened; pellicle firm; body form constant (Kudo, 1966). Chloroplasts small, discoid, pyrenoids usually absent; most species flat and leaf-shaped; often with ridges or fins running helically or longitudinally (Illustrated Guide, 1985).
Species: 120-170 μm long, 45-70 μm wide; usually slightly twisted; a long caudal prolongation; flagellum about 1/2 body length; stigma prominent; a discoidal paramylon (paramylum) body central; pellicle longitudinally striated (Kudo, 1966).
var. longicauda: cell body 85-170 μm long, 45-70 μm wide; locomotive flagellum shorter than the cell body; a single paramylon body ring shaped (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).


Phacus longicauda (Ehrenberg) Dujardin, by H. Yoshino (left) and by K. Mikami (right)
Phacus longicauda Phacus longicauda


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