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 with spines
Spines long
T. armata 16 samples 32-44 μm 199?-2006	T. armata ? 50 x 36 μm Iyari marsh 4 Omachi Nagano, 2007	T. charkowiensis ? collar present ? or T. superba ? 35 x 31 μm Uruguay, 1999	T. superba 9 samples 37-47 μm 2004-2008
T. horrida or T. robusta ? 20 x 16 μm Uruguay, 1999	T. robusta ? or T. allia ? 23 x 18 μm Saitama, 1999	T. robusta 27 x 20 μm Uruguay, 1999	T. acanthostoma ? 32 x 28.5 μm Mi-ike 1 Norikura highland Nagano, 2007
Spines short; lorica cylindrical
T. allia 15 samples lorica broad cylindrical 28-32 μm 1999-2008	T. klebsii 15 samples lorica cylindrical 21-32 μm 200-2008	Trachelomonas sp. lorica cylindrical 32 x 12 μm Japan, 1998 Movies	T. crispa 3 samples 34-38 μm 2004-2008
Spines short; lorica ellipsoidal with/without collar
T. caudata or T. allorgei ?? 3 samples 54 x 22 μm 2007-2008	T. hispida 47 samples lorica ellipsoidal 16-37 μm 1999-2008	T. raciborski 3 samples 28-41 μm 199?-2004 Movies	Trachelomonas sp. 20 x 15 μm Okubo Ryoke Akigase park Saitama, 2005
T. obtusa 28 x 16 μm Izumo Shrine Izumo Shimane, 2006	Trachelomonas sp. T. hispida ? 39 x 23 μm Jionji-shinsui p. Iwatsuki-ku Saitama, 2006	T. klebsii ? or T. hispida ? collar absent μm Nishi-Urawa Saitama, 2003

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