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).

31 μm 63 μm 94 μm; x 640

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