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Euglenophyceae: Euglenales
Mastigophora: Euglenida

 Phacus stokesii
Lemmermann

Phacus stokesii 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: Cell body broad ovoidal or nearly circular, broad longitudinal furrow present, 13-20 (-23) μm long, 12-15 μm wide; anterior broadly rounded, posterior slightly pointed; pellicle with longitudinal striae; 1-2 paramylon bodies disc-shaped (Photomicrographs of the Freshwater Algae, 1995).

Phacus stokesii Lemmermann ? or similar species (P. acuminatus ?), cell body 27 μm long, 17 μm wide, L/W=1.6, x 640, Nanbata castle park, Fujimi city, Saitama Pref., Japan, September 18, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Phacus Phacus Phacus

Phacus stokesii or similar species, cell body μm long, μm wide, L/W=, x 640, Nanbata castle park, Fujimi city, Saitama Pref., Japan, September 18, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Phacus Phacus Phacus

Phacus stokesii or similar species, cell body 26 μm long, 16 μm wide, L/W=1.6, x 640, Nanbata castle park, Fujimi city, Saitama Pref., Japan, September 18, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Phacus Phacus Phacus

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