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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Phacus pleuronectes
(O.F. Müller) Dujardin, 1841

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).

Phacus pleuronectes (O.F. Müller) Dujardin 1841, cell body 46 μm long, 37 μm wide, cauda slanted, 12 μm long, Japan, 1999 by Y. Tsukii

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