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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Phacus torta
(Lemmermann) Skvortzow var. tortuosa Skvortzow
or Phacus helikoides Pochmann var. helikoides

Phacus tortus 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: 80-100 μm; similar to P. longicauda; twisted 40-60 degree (How to know the protozoa, 1979).
Var. tortuosa: twisted about 90 degree.


Phacus tortus or tortuosa ?, cell body 100 μm long, 53 μm wide, tail 50 μm wide, x 400, Japan, 199? by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Phacus Phacus


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