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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Phacus acuminatus
A. Stokes 1885

Phacus 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).


Phacus acuminatus Stokes 1885, cell body 35 μm long, 27 μm wide, x 640, Entsu-ji (temple), Kawajima (Kawashima) town, Saitama city, Saitama Pref., Japan, April 2002 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Phacus acuminatus Phacus acuminatus Phacus acuminatus Phacus acuminatus Phacus acuminatus Phacus acuminatus Phacus acuminatus

Phacus curvicauda Swirenko: Cell body 24-26 μm diam., (25)-38-30 μm long; 2 paramylons (Illustrations of The Japanese Fresh-water Algae, 1977).


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