Species: 40-65 μm long, 14-20 μm wide; anterior end rounded, posterior end pointed; fusiform during locomotion; highly plastic when stationary; chloroplasts more or less bandform, radially arranged; nucleus posterior (Kudo, 1966). Fusiform, 40-80 μm long, 12-20 μm wide; swim rapidly (Illustrated guide, 1985).
Mucous body granular in shape (An illustrated guide to freshwater zooplankton in Japan, 2000).

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E. viridis ? 67 x 11 μm Furu-tone river Kasukabe Saitama, 2004	E. viridis 60 x 16 μm drainage ditch Ogasaki Iwatsuki Saitama, 2005	E. viridis 60 x 15 μm drainage ditch Shimofukada Iwatsuki Saitama, 2006	E. viridis 59 x 16 μm Sakitama-kofun p. Gyoda Saitama, 2007
E. viridis 63 x 15 μm Shigesato Tsukuba Ibaraki, 2007	E. viridis 57 x 15 μm drainage ditch Shimo-nanbata Fujimi Saitama, 2006	E. viridis 57 x 14 μm drainage ditch near Oppe river Kawajima Saitama, 2005	E. viridis 57 x 13 μm Watasuge marsh Tsugaike highland Nagano, 2005
E. viridis 55 x 17 μm Akasaka-numa Iwatsuki-ku Saitama, 2006	E. viridis 55 x 15 μm Oura central p. Oura Gunma, 2006	E. viridis 55 x 12.5 μm drainage ditch Kurihashi Saitama, 2006	E. viridis 50-55 x 14-15 drainage ditch near Tobai-numa n.p. Kawashima or Kawajima Saitama, 2005
E. viridis 54 x 12 μm Watarase Wetland Fujioka Tochigi, 2005	E. viridis 54 x 12 μm near Yoshino park Mitsukaido Ibaraki, 2006	E. viridis 54 x 11 μm Okubo Ryoke Akigase park Saitama, 2005	E. viridis μm Kondo-numa Tatebayashi Gunma, 2006
E. viridis 53 x 14 μm Iruma Saitama, 2002	E. viridis 52 x 13 μm Ageo Saitama, 2002	E. viridis 52 x 13 μm Ushiku Ibaraki, 2002	E. viridis 51 x 15 μm Soka Saitama, 2002
E. viridis 51 x 14 μm Kondo-numa p. Tatebayashi Gunma, 2006	E. viridis 51 x 9 μm Mizuko Fujimi Saitama, 2003	E. viridis 50 x 16 μm Kitamoto n.o.p. Kitamoto Saitama, 2006.1	E. viridis 45 x 12 μm Kitamoto n.o.p. Kitamoto Saitama, 2006.3
E. viridis 50 x 14 μm Kami-omino Kawajima Saitama, 2006	E. viridis 50 x 13 μm sewage drain Utsunomiya Tochigi, 2006	E. viridis μm Kagami-ishi Fukushima, 2008
E. viridis 47 x 16 μm Tobai-numa n.p. Kawajima Saitama, 2006	E. viridis 48 x 14 μm rice field near Tobai-numa n.p. Kawashima or Kawajima Saitama, 2005	E. viridis 48 x 12 μm Iwajuku Gunma, 2001	E. viridis μm Nishi-Urawa Saitama, 2003
E. viridis 49 x 13 μm Midori-no-oka p. Matsubushi Saitama, 2004	E. viridis 47 x 15 μm Banpaku memorial p. Tsukuba Ibaraki, 2006	E. viridis or E. stellata ? 45 x 14 μm Omoi river Oyama Tochigi, 2004	E. viridis 45 x 14 μm Watarase river Ashikaga Tochigi, 2004
E. viridis 45 x 14 μm Kurome river Asaka Saitama, 2005	E. viridis 45 x 12.5 μm Oura central p. Oura Gunma, 2006	E. viridis 45 x 13 μm Shiba river near Owada p. Saitama, 2005
E. viridis ? 44 x 13 μm near Town Hall Shobu Saitama, 2004	E. viridis 42 x 12 μm Kami-omino Kawajima Saitama, 2006	E. viridis 42 μm Japan, 199?	E. viridis 40 x 8 μm Akigase Park Saitama, 2002
E. viridis μm Ranzan Saitama, 2003	E. viridis 41 x 14 μm Oura central p. Oura Gunma, 2006	E. viridis 38 x 13 μm Kiyasse-Hanyu Hanyu Saitama, 2006	E. viridis 38 x 11 μm Gunma-no-suigo Itakura Gunma, 2006
E. viridis 37 x 14 μm Ko-sumida river Kasukabe Saitama, 2006	E. viridis 37 x 9 μm Tatebayashi Gunma, 2001	E. viridis ?? 35 x 8 μm Ueno Tokyo, 2001	E. viridis ?? 31 x 7 μm Higashi-urawa Saitama, 2001

Similar species -->> E. stellata; E. cantabrica;

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