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: A linear short filament, straight or slightly curved, covered with a mucilagenous sheath having a radiating strands (only visible when stained); planktonic; cell body cylidrica, straight or slightly curved, both ends rounded, 8-10 μm long, 3-3.5 μm wide; a single chloroplast parietal, plate-like, extending at both ends, without pyrenoids; 1 or several granules present within vacuoles located at both ends of the cell (Photomicrographs of the Freshwater Algae, vol. 13 (1994).

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G. pulchra ? 10-11 x 6 μm Koma river Sakado Saitama, 2003	G. pulchra ? 9 x 4.5-5 μm Shikinawa-ike Fukuoka, 2001	G. pulchra ? μm Doman-green p. Nishi-Urawa Saitama, 2003	G. pulchra ? 14-19 x 5 μm Karasu-ga-mori p. Nishi-nasuno Tochigi, 2004
G. pulchra ? 11-12 x 7.5 μm Sue-machi Fukuoka, 2001	G. pulchra ? 11-16 x 6 μm Kami-omino Kawajima Saitama, 2006	G. pulchra 10-15 x 7 μm Igashira park Mooka Tochigi, 2006
G. pulchra 17 x 7 μm Kodanuki marsh Fujinomiya Shizuoka, 2006	G. pulchra 9-12 x 6.5 μm Iroha-numa Azuma Mt. Yamagata, 2007
G. pulchra or Gloeotila ? Maimeno-ike 2 Norikura highland Nagano, 2007	G. pulchra or Gloeotila ? 10-19 x 5-9 μm Ohnuma Nasu-shiobara Tochigi, 2006

Similar genera -->> Microspora; Klebsormidium;

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