Euglenophyceae:
Euglenales
Mastigophora: Euglenida
Phacus acuminatus
A. Stokes 1885 var. acuminatus
Species:
Cell body flat, anterior narrowed, posterior broadly rounded, with short blunt cauda,
30-40 μm long,
20-30 μm wide, cauda usually straight, but
rarely slightly curved, dorsal furrow short and shallow, lateral margins broadly rounded or nearly straight,
periplasts longitudinally striated, usually a single large paramylon body but sometimes accompanied with a second
smaller one (Photomicrograph of the freshwater algae, 3: 71, 1985).
Cell body 23-40 μm long, 20-30 μm wide,
dorsal view nearly spherical; cauda short V-shaped and slightly curved or straight, striae also straight;
a locomotive flagellum nearly the same as the cell body in length;
paramylon bodies disc-shaped with a hole at the center, 1-2 in number;
(An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).
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Phacus acuminatus Stokes 1885,
cell body μm long, μm wide,
x 640, near Yanase river, Mizuko, Fujimi city, Saitama Pref., Japan, December 2003 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
With a parasite ?
Phacus acuminatus,
cell body μm long, μm wide,
x 640, near Yanase river, Mizuko, Fujimi city, Saitama Pref., Japan, December 2003 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Phacus acuminatus Stokes var. acuminatus:
Cell body flat, anterior narrowed, posterior broadly rounded, with short blunt cauda,
30-40 μm long,
20-30 μm wide, cauda usually straight, but
rarely slightly curved, dorsal furrow short and shallow, lateral margins broadly rounded or nearly straight,
periplasts longitudinally striated, usually a single large paramylon body but sometimes accompanied with a second
smaller one (Photomicrograph of the freshwater algae, 3: 71, 1985).
Please click on images for viewing enlarged.
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