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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 40 μm long (including short tail, 5 μm long), 33 μm wide, L/W=1.2, x 640, No.2, Nozomiko (Lake Nozomi), Madarao highland (Niigata & Nagano Pref.), Iiyama city, Nagano Pref., Japan, April 26, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Phacus Phacus Phacus

Phacus circulatus Pochmann var. circulatus (or P. acuminatus ?), cell body 43 μm long (excluding tail, 8 μm long), 35 μm wide, L/W=1.2, x 640, No.2, Nozomiko (Lake Nozomi), Madarao highland (Niigata & Nagano Pref.), Iiyama city, Nagano Pref., Japan, April 26, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Phacus Phacus

Images of collecting locality: No.2, Nozomiko (Lake Nozomi), Madarao highland, Iiyama city, Nagano Pref., Japan, April 26, 2007 by Y. Tsukii

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