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Euglenophyceae: Euglenales
Mastigophora: Euglenida

 Trachelomonas acanthostoma
Stokes emend. Deflandre 1926

Trachelomonas 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 broad ellipsoidal, 26-36.5 μm long, 22-28 μm wide; lorica covered with small dots; flagellar opening surrouned with short spines (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).

Trachelomonas acanthostoma Stokes emend. Deflandre 1926 (or Trachelomonas lelloggii Skvortzow ?), lorica 32 μm long, 28.5 μm wide, L/W=, flagellum about 130 μm long, x 640, No.1, Mi-ike (pond), Norikura highland, Azumi, Matsumoto city, Nagano Pref., Japan, November 4, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Trachelomonas Trachelomonas

Images of collecting locality: No.1, Mi-ike (pond), Norikura highland, Azumi, Matsumoto city, Nagano Pref., Japan, November 4, 2007 by Y. Tsukii

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