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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Phacus pleuronectes
Swirenko, 1915

Phacus 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: 45-100 μm long, 30-70 μm wide; short posterior prolongation slightly curved; a prominent ridge on the convex side; longitudinally striated; one ? circular paramylon (paramylum) body near center; flagellum as long as cell body (Kudo, 1966). Cell body nearly spherical at dorsal view; anterior end separated into two spherical projections; cauda strongly curved; dorsal ridge short or absent (cf. dorsal ridge present P. triqueter); cell body 40-80 μm long, 30-50 μm wide; two ? paramylon bodies disc-shaped; striae straight (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).
Similar Species -->> P. curvicauda;


Phacus pleuronectes (O.F. Müller) Dujardin 1841 ?, cell body 55 μm long, μm wide, a large paramylon body at the center of the cell body, x 400, x 640, near Ukima Park, Kita-ku, Tokyo, Japan, July 2001 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 Phacus Phacus Phacus


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