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: 28-40 μm long, 25-31 μm diam., lorica broad ellipsoid, no collar anterior; both ends dented (Illustrations of The Japanese Fresh-water Algae, 1977).
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Similar species -->> T. hispida var. duplex;
T. raciborski
lorica 29 x 22 μm
near Yamaguchi Univ.
Yamaguchi, 2004
T. raciborski
lorica 28 μm
Japan, 1998
Movies 
T. raciborski
or T. armata ?
lorica 41 μm
Naruto
Chiba, 2003
