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: Collar present: lorica spherical or ellipsoidal: surface coarse Species: Lorica ellipsoid, both ends narrowly rounded, lateral sides swelled; collar present; wall scabrous with minute protuberances irregularly disposed; 23-26 μm long, 18-20 μm wide (Photomicrographs of the Fresh-water Algae, vol.8, 1988).

var. scabra: Lorica ellipsoidal
T. scabra v. scabra 28 x 19 μm water reservoir near Yamaguchi Univ. Yamaguchi, 2004	T. scabra v. scabra 26 x 20 μm Jizoh-bori Sannoh Park Saitama, 2005	T. scabra v. scabra ? 26 x 19 μm Kijioka Castle Ruin Kodama town Saitama, 2003	T. scabra v. scabra ? 24 x 20 μm flower park Ashikaga Tochigi, 2006
T. scabra v. scabra ? 24 x 20 μm Kijioka Castle Honjo Saitama, 2006	T. scabra v. scabra ? μm drainage ditch Sakura Chiba, 2008
var. coberensis: Lorica semi-spherical or broad ellipsoidal
T. scabra v. coberensis 24 x 21 μm Kejo-numa Osaki Miyagi, 2006	T. scabra v. coberensis 27 x 20 μm Yoshimi-machi Saitama, 2001

Similar species >> T. planktonica; T. lefevrei; T. crebea; T. playfairi;

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