Species: 80-125 μm long, 10-35 μm wide; cylindrical; anterior end a little narrowed and rounded; posterior end drawn out; spiral striae, made up of small knobs; many discoid chloroplasts; two ovoidal paramylon (paramylum) bodies; flagellum about 1/4 the body length; sluggish (Kudo, 1966). 80-180 μm long. Several varieties: var. suprema 140-180 μm, var. marchica, 85-165 micron, var. abruptacuminata, 130-145 μm (How to know the protozoa, 1979). 45-250 μm long, 5-35 μm wide (Illustrated guide, 1985). Cell body 70-96 μm long, 10-14 μm wide, two large paramylon bodies ring-shaped (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).

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All knobs equal in size; all striae same in thickness
E. spirogyra 260 x 30 μm Shirahata-Numa Urawa Saitama, 2005	E. spirogyra 250 x 44 μm Akasaka-numa Iwatsuki-ku Saitama, 2006	E. spirogyra 230 x 45 μm Izumo Shrine Izumo Shimane, 2006	E. spirogyra 230 x 43 μm Omachi natural p. Ichikawa Chiba, 2006
E. spirogyra 240 x 40 μm Otsuka-ike Mito Ibaraki, 2003	E. spirogyra v.1 234 x 35 μm 7 striae/10μm knobs 1.7 μm Fukushima, 1999	E. spirogyra 206 x 40 μm 3.5 striae/10μm knobs 1.5 μm Uruguay, 1999	E. spirogyra v.1 195 x 30 μm 5.5 striae/10μm knobs 1.5 μm Uruguay, 1999
E. spirogyra 190 x 22 μm striae/10μm knobs μm Senjo-ga-hara Nikko Tochigi, 2003	E. spirogyra v.1 190 x 41 μm 4.5 striae/10μm knobs 1.5 μm Japan, 1997	E. spirogyra v.1 190 x 23 μm 6 striae/10μm knobs 1.5 μm Iwajuku Gunma, 2001	E. spirogyra v.1 180 x 25 μm Tane-ike Togakushi highland Nagano, 2005
E. spirogyra v.1 180,190 x 24 μm Ushidome-ike Norikura highland Nagano, 2005	E. spirogyra 175 x 35 μm Mizuko Fujimi Saitama, 2003	E. spirogyra 175 x 25 μm Higashi-sano Hakuba Nagano, 2004	E. spirogyra 170 x 28 μm 175 x 26 μm near Yamaguchi Univ. Yamaguchi, 2004
E. spirogyra v.1 163-167 x 31-33 μm striae/10μm knobs μm Mitsumata-numa Kawagoe etc. Saitama, 2005	E. spirogyra v.1 164 x 30 μm 6 striae/10μm knobs 1.5 μm Japan, 1998	E. spirogyra v.1 162 x 30 μm flag. 45 μm 6 striae/10μm knobs 1.5 μm Narita Chiba, 2000	E. spirogyra v.1 160 x 30 μm flag. μm Jionji-shinsui p. Iwatsuki-ku Saitama, 2006
E. spirogyra 150 x 30 μm Dedono-yu Nishiwaga Iwate, 2007	E. spirogyra 180 x 24 μm Iyari marsh 1 Omachi Nagano, 2007	E. spirogyra 160 x 33 μm 3 striae/10μm knobs 1.5 μm Japan, 1997
E. spirogyra 162 μm knobs scarce 6-7 striae/10μm knobs 1.5 μm Saitama, 1999	E. spirogyra 160 x 25 μm 7 striae/10μm knobs 1.5 μm Sue-machi Fukuoka, 2001	E. spirogyra 160 x 22 μm striae/10μm Shimo-muneoka Shiki Saitama, 2004	E. spirogyra 155 x 32 μm striae/10μm Sakitama-kofun p. Gyoda Saitama, 2004
E. spirogyra 155 x 25 μm striae/10μm Imori pond Myoko highland Niigata, 2004	E. spirogyra 152 x 23 μm striae/10μm Suijo Park Gyoda Saitama, 2006	E. spirogyra 135 x 19 μm striae/10μm Naruto-Togane Sanmu Chiba, 2006	E. spirogyra 140 x 20 μm striae/10μm Hazama marsh Ashikaga Tochigi, 2006
E. spirogyra 150 x 27 μm striae/10μm Shuku Sakura-ku Saitama, 2004	E. spirogyra 150 x 25 μm striae/10μm Junichogata s.k. Himi Toyama, 2006	E. spirogyra v.? 145 x 23 μm 6-7 striae/10μm knobs 1.5 μm anterior rounded Mihashi Park Saitama, 2002	E. spirogyra v.? 145 x 21 μm Kitamoto nature o.p. Kitamoto Saitama, 2005
E. spirogyra v.1 140 x 24 μm 5.5 striae/10μm knobs 1.5 μm Tsuchiura Ibaraki, 2002	E. spirogyra 140 x 22 μm Motono Chiba, 2003	E. spirogyra 140 x 20 μm Higashi-sano Hakuba Nagano, 2004	E. spirogyra 130 x 25 μm striae/10 μm knobs μm Saitama, 1999
E. spirogyra 125 x μm striae/10 μm knobs μm Iruma Saitama, 2003	E. spirogyra 120 x μm striae/10 μm knobs μm Ranzan town Saitama, 2003	E. spirogyra 115 x 24 μm striae/10 μm knobs μm Ichikawa Chiba, 2001	E. spirogyra 120 x 17 μm striae/10 μm Kenmin-kenko f.m. Koshigaya Saitama, 2005

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