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).

Lorica granulated (or coarse)
Collar present
T. scabra 8 samples 24-28 x μm 2001-2008	Trachelomonas sp. μm Saitama, 1999	T. planktonica 26 x 18 μm Sannoh park Nishi-ku Saitama, 2004	T. planktonica var. oblonga ? 26 x 15 μm Otto-Numa Tsuchiura Ibaraki, 2002
T. similis ? or T. scabra ? μm Saitama, 1999	T. similis ? μm Hazama marsh Ashikaga Tochigi, 2003	T. similis ? 23 x 18 μm 25 x 16 μm Shirahata-Numa Urawa Saitama, 2005	Trachelomonas ? 61 x 42 μm Kowashimizu Suwa Nagano, 2005
Collar present/absent
T. granulosa 17 samples granular projections 16-39 μm 1998-2007	T. intermedia 11 samples surface dotted 18-31 x μm 1999-2008
Collar absent
T. abrupta ? collar 1 μm 32 x 23 μm Mizuko-kaizuka p. Fujimi Saitama, 2004	T. abrupta 26 samples 17-32 μm 1999-2008	T. lacustris ? 7 samples 23-27 μm 2003-2008	Trachelomonas sp. 30 x 17, 23 x 14 μm near Town Hall Shobu Saitama, 2004
T. rugulosa parallel waves 15 μm Saitama, 1999

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