Genus: Filamentous algae without branching, no rhizoids, covered with gelatinous sheath; cell body cylindrical or ellipsoidal, cells attached side by side or separated; a single chloroplast band-form, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Filament covered with a thick gelatinous coat; 2 or 4 cells closely contacted; cell body elongated ellipsoid or ovoid, 4-6 μm long, 7-9 μm wide; chloroplasts parietal, with a single pyrenoid (Photomicrographs of the Freshwater Algae, vol.4, 1985).

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G. ellipsoidea 6-12 x 10-11 μm Yukawa-numa Nishiwaga Iwate, 2007	G. ellipsoidea 6-11 x 9 μm near Iroha-numa Zao mountain Yamagata, 2006	G. ellipsoidea 7-8 x 12 μm Oze-ga-hara Katashina Gunma, 2006	G. ellipsoidea 6-7 x 7,10 μm Omine-numa Minakami Gunma, 2006
G. ellipsoidea 6-10 x 12 μm Senjo-ga-hara Nikko Tochigi, 2006	G. ellipsoidea stock Tnk-2 5-12 x 11 μm Karasugamori Nishinasuno Tochigi, 2001 Movies	G. ellipsoidea 9 x 6 μm Nasuno-ga-hara m. Nishi-nasuno Tochigi, 2004	G. ellipsoidea 5-10 x 7 μm Kinu-gawa g.p. Takanezawa Tochigi, 2004
G. ellipsoidea 6-7 x 11 μm near Shinrin-koen Namegawa Saitama, 2006	G. ellipsoidea 5.5 x 8.5 μm Hanasaki water p. Kazo Saitama, 2005	G. ellipsoidea 3-7 x 8 μm Kiyasse-Hanyu Hanyu Saitama, 2006	G. ellipsoidea 5-10 x 7 μm Koyama river Misato Saitama, 2006
G. ellipsoidea 4-8 x 9 μm Numa-no-hara m. Madarao highland Niigata, 2005	G. ellipsoidea 5-10 x 11 μm Mousen-ike Tsugaike highland Nagano, 2006	G. ellipsoidea 12 x 12 μm Karakemi marsh Omachi Nagano, 2006	G. ellipsoidea 8-10 x 12 μm Iyari marsh Omachi Nagano, 2006
G. ellipsoidea 5-7 x 8 μm Nagaike Shiga highland Nagano, 2005	G. ellipsoidea 3-7 x 8 μm Shibu-ike Shiga highland Nagano, 2005	G. ellipsoidea 7-8 x 9 μm Shijuhachi-ike Shiga highland Nagano, 2005
G. ellipsoidea 3 x 8 μm Ichinose-enchi Norikura highland Nagano, 2005	G. ellipsoidea 6-7 x 7,10 μm Maimeno-ike Norikura highland Nagano, 2006	G. ellipsoidea 4.5-7 x 7-8 μm Ushidome-ike Norikura highland Nagano, 2005	G. ellipsoidea 7 x 8 μm Ushidome-ike Norikura highland Nagano, 2006
G. ellipsoidea 6-8 x 9 μm Kashibaru m.3 Karatsu Saga, 2006	G. ellipsoidea 4-10 x 11 μm Komado m.6 Showa & Tajima Fukushima, 2007	G. ellipsoidea μm Shijuhachi-ike Shiga highland Nagano, 2008	G. ellipsoidea μm Ryugahara marsh Yuri-Honjo Akita, 2008
G. ellipsoidea μm Akebono-yama p. Kashiwa Chiba, 2008

Similar genera -->> Microspora; Klebsormidium;

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