Euglenophyceae:
Euglenales
Mastigophora: Euglenida
Phacus pyrum
(Ehrenberg) F. Stein 1878
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: About 30-50 μm long, 10-20
μm wide; circular in cross section; with caudal prolongation;
pelicle obliquely ridged; flagellum as long as the body (Kudo, 19660).
Cell body 28-55 μm long, 10-21 μm wide
two paramylons thick disc-shaped, parietal
(An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).
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Phacus pyrum (Ehrenberg) Stein,
cell body 41 μm long, 17 μm wide, L/W=2.4,
anterior flagellum 40 μm long,
x 640, Jionji-shinsui-koen (Jion temple water park), Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, February 12, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Phacus pyrum (Ehrenberg) Stein,
cell body 35 μm long, 15 μm wide, L/W=2.3,
x 640, Jionji-shinsui-koen (Jion temple water park), Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, February 12, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
Jionji-shinsui-koen (Jion temple water park), Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, February 12, 2006 by Y. Tsukii
Please click on images for viewing enlarged.
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