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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Phacus stokesii
Lemmermann 1901

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).
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Phacus pusillus
P. stokesii
v. minor
15 μm
Gyoda
Saitama, 2001
Phacus pusillus
P. stokesii
v. minor
15 μm
Iwajuku
Gunma, 2001
Phacus stokesii
P. stokesii
v. minor
17 μm
Akigase Park
Saitama, 2002
Phacus stokesii
P. stokesii ?
v. minor
16 x 10 μm
Tsuchiura
Ibaraki, 2002
Phacus stokesii
P. stokesii
v. minor
16 x 10 μm
Shishizuka
Tsuchiura
Ibaraki, 2003
Phacus stokesii
P. stokesii
v. minor
16 x 10 μm
Shimotsuma
Ibaraki, 2003
Phacus stokesii
P. stokesii
v. minor
17 x 9-11 μm
Mizuko-kaizuka p.
Fujimi
Saitama, 2004
Phacus stokesii
P. stokesii
v. minor
19 x 9 μm
Akao
Sakado
Saitama, 2004
Phacus stokesii
P. stokesii
v. minor
15 x 9 μm
Shimo-muneoka
Shiki
Saitama, 2004
Phacus stokesii
P. stokesii
v. minor
16 x 9 μm
near Karasu river
Fujioka
Gunma, 2004
Phacus stokesii
P. stokesii
v. minor
16 x 8 μm
Shiba river
Owada Park
Saitama, 2005
Phacus stokesii
P. stokesii
v. minor
19 x 12 μm
Okubo Ryoke
Akigase Park
Saitama, 2005
Phacus
P. stokesii ?
or similar sp. ?
26-27 x μm
Nanbata castle p.
Fujimi
Saitama, 2005
Phacus
P. stokesii ?
or similar sp. ?
26-27 x μm
Nanbata castle p.
Fujimi
Saitama, 2005

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Phacus
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