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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Trachelomonas playfairi

Genus: Euglenas in a close fitting lorica; a single long flagellum extends through small opening; lorica with or without short collar; yellow to brown (How to know the protozoa, 1979). Lorica often possesses numerous spines, composed of ferric hydroxide impregnated with brown manganic compound (Kudo, 1966).
Species: Lorica smooth, broad ellipsoidal, both ends rounded, 18-24 μm long, 15-17 μm wide, collar curved, relatively long, about 4 μm high (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).

Trachelomonas playfairi, lorica 22 μm long, posterior rounded, x 400, x 640, Japan, 1998 by Y. Tsukii

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