Genus: Spindle, cylindrical or band-form; pellicle usually marked by longitudinal or spiral striae; some with a thin pellicle highly plastic; stigma usually anterior; chloroplasts discoid, band-form, or fusiform; two paramylum bodies located on either side of nucleus, rod-like to ovoid in shape or numerous and scattered throughout; contractile vacuole near reservoir; cell division longitudinal (Kudo, 1966).

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Subgenus: Rigidae Chloroplasts small disc-shaped, without pyrenoids; pellicle rigid, euglenoid movement rare
Posterior end tapered; euglenoid movement inactive/rare
E. acus = L. acus 22 samples several param. body firm 55-291 μm 199?-2008	E. limnophila = P. limnophila 5 samples 78-115 μm 199?-2004	E. wangi 4 samples 56-63 μm anterior paramylons Tatebayashi 2001-2004
Tail present; euglenoid movement rare
E. gigas = E. helicoidea ? = L. helicoidea ? 10 samples several param. body twisted 350-420 μm 1999-2008	E. tripteris = L. antefossa or = L. tripteris ? 41 samples 2 rod-shaped p. body twisted 63-281 μm 199?-2007	E. oxyuris = L. oxyuris ? 22 samples 2 ring-shaped p. body twisted 52-363 μm 199?-2007	E. gaumei 4 samples 2 ring-shaped p. body not twisted 113 μm 1998-2002
E. spirogyra = L. fusca or = L. spirogyroides 79 samples 2 ring-shaped p. body flattened with small knobs 90-250 μm 1997-2007	E. spirogyra 180 x 30 μm striae/10 μm knobs μm Fujimi Saitama, 2004	E. spirogyra ? 2 ring-shaped p. small variety ? similar to E. oxyuris Matsumoto Nagano, 2001	E. spirogyra ? or Lepocinclis ? 115 x 36 μm near Town Hall Shobu Saitama, 2004
Euglena sp.12 115 x 14 μm Saitama, 1999
Subgenus: Lentiferae Chloroplasts disc-shaped, small; pellicle soft, euglenoid movement active
Euglenoid movement rare
E. ehrenbergii 35 samples many small chl. body flattened 168-370 μm 199?-2008	E. proxima 8 samples 76-101 μm 199?-2005	E. variabilis 4 samples 39-62 μm 199?-2005	E.hemichromata 25 samples 53-150 μm 199?-2005
Subgenus: Serpentes Chloroplasts large disc-shaped, with pyrenoids
E. deses 86 samples rod-shaped p. body cylindrical 90-210 μm 199?-2007	Euglena sp.15 52 μm Saitama, 1999	E. mutabilis 86 samples 33-160 μm 2000-2008
Subgenus: Catilliferae Chloroplasts saucer-shaped, pyrenoids covered with paramylon sheath
Both ends rounded		Anterior spherical, posterior pointed when swimming
E. obtusa 6 samples Chl. 28-40 112-132 μm 2001-2006	E. clara 15 samples Chl. 10-16 34-70 μm 2001-2005	E. clavata 68 μm Japan, 199?	E. clavata ? 82 μm Kurihashi Saitama, 2001
Cell body cylindrical; posterior pointed
E. gracilis 17 samples Chl. 6-16 46-55 x 8-10 μm 1998-2004	E. agilis = E. pisciformis 37 samples Chl. 2-3 17-45 μm 199?-2008	E. pisciformis ? Chl. 2-3 20 μm Ueno Tokyo, 2001
Posterior end tapered
E. polymorpha ? Chl. 12-20 118 μm Nishi-Urawa Saitama, 2001	E. granulata 10 samples 82-94 μm Chl. 8-14 2001-2004	E. caudata 18 samples 55-106 μm Chl. 9-15 199?-2005	E. anabaena 16 samples Chl. 3-6 37-62 μm 2001-2005
Euglena sp. 3 samples Chl. μm Ashikaga Tochigi, 2003
Chloroplast margin incised forming bands
E. sociabilis 4 samples 57-105 μm 199?-2001	E. sanguinea 12 samples 106-144 μm Japan, 1999-2008	E. bivittata ? 4 samples 29 x 7.5 μm 2000-2004
Subgenus: Radiatae Chloroplasts ribbon-shaped radiated from paramylon center
E. viridis 49 samples 31-67 μm 199?-2008	Euglena sp.4 2 samples μm Japan, 2002	E. stellata 6 samples 39-62 μm 1999-2003	E. stellata ? 60 x 17 μm Tatebayashi Gunma, 2001
E. schmitzii or E. chadefaudii? 11 samples 77-85 μm 2001-2008	E. chadefaudii ? 1 sample μm near Nan-ko Shirakawa Fukushima, 2003
Other species
E. texta ? 20 samples cell 34-55 μm 199?-2006
Unidentified
Unidentified sp. μm 199?-2005	Unidentified sp. μm 199?-2005	Unidentified sp. μm 199?-2005	Unidentified sp. μm 199?-2005

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