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Chlorophyceae: Chlamydomonadales (Volvocales): Chlamydomonadaceae
Volvocida: Chlamydomonadina: Chlamydomonadidae

 Chloromonas ulla
(Skuja) Gerloff et Ettl in Ettl 1970
Syn. Chlamydomonas ulla Skuja 1956, C. vulgaris fo. gallica Bourrelly 1951

Chloromonas Genus: Similar to Chlamydomonas, but pyrenoids absent.
Species: Cell body spherical, 12-25 μm in diam. (young cell slightly ellipsoidal); papilla broad conical in shape; nucleus centrally located; a single chloroplast cup-shaped; stigma large, elliptical or circular in shape, located at anterior half of the cell; 2 contractile vacuoles at the base of flagella (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

Chloromonas ulla (Skuja) Gerloff et Ettl, cell body 22 μm long, 20 μm wide, L/W=1.1, flagella about 15 μm long, a small conical papilla present, a single nucleus located at the center of the cell, elliptical stigma above equator of the cell body, x 640, Yasuragi-no-ike (pond), Oura central park, Oura town, Gunma Pref., Japan, February 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
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Images of collecting locality: Yasuragi-no-ike (pond), Oura central park, Oura town, Gunma Pref., Japan, February 2006 by Y. Tsukii

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