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Euglenophyceae: Euglenales
Mastigophora: Euglenida

 Phacus circulatus
Pochmann

Phacus 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:

Phacus circulatus Pochmann var. circulatus, cell body 47 μm long (including tail), 37 μm wide, tail 7 μm long, x 640, rice field, Myoyo (Myouyou), Fukiage town, Saitama Pref., Japan, October 17, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Phacus Phacus

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