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Euglenophyceae: Euglenales
Mastigophora: Euglenida

 Phacus pleuronectes
(O.F. Müller) Dujardin 1841

Phacus pleuronectes 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. triqueter; P. curvicauda;

Phacus pleuronectes (O.F. Müller) Dujardin 1841, cell body 47 μm long, μm wide, a single large paramylon body at the center, x 640, Otto-Numa (pond) Chosei-chi, Tsuchiura city, Ibaraki Pref., Japan, July 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 pleuronectes Phacus pleuronectes Phacus pleuronectes Phacus pleuronectes Phacus pleuronectes

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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