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 elongated cylindrical, covered with short spines, collar absent, about 24 μm long, 13 μm wide (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).

Similar species -- >> T. allia (broad cylindrical, spiny); T. hispida (ellipsoidal, spiny); T. abrupta (cylindrical/ellipsoidal, dotted); T. lacustris (elongated cylindrical, dotted);

31 μm 63 μm 94 μm; x 640

Images of collecting locality: Block 2-4, Kashibaru marsh, Karatsu city, Saga Pref., Japan, September 9, 2008 by Y. Tsukii