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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 nearly spherical, 23 μm in diam., a dome-like papilla (about 1.5 μm high) present, stigma at equator of the body, a nucleus centrally located, x 640, standing water near Yoshigadaira (or Yoshigataira) marsh, Shirane mountain, Kusatsu town, Gunma Pref., Japan, June 5, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Chloromonas Chloromonas Chloromonas Chloromonas
Dividing cells, cell body nearly spherical, 12-13 μm in diam., x 640
Chloromonas Chloromonas Chloromonas

Chloromonas maculata Korschikoff (Syn: Chamydomonas korschkoffii Pascher): Cell body spherical, 15-26 μm in diam.; 2 flagella approximately equal to cell-body length; papilla small, flat in shape; many chloroplast small plate-like, without pyrenoids; stigma elliptical; 2 contractile vacuoles at the base of flagella; nucleus located at the center of the cell body (Photomicrographs of the Freshwater Algae, vol. 17, 1996). Cell body 15-22 μm in diam.; many plate-like chloroplasts circular or polygonal in shape (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

Chloromonas ulla (Skuja) Gerloff et Ettl: Cell body spherical, 12-25 μm in diam. (young cell slightly ellipsoidal); papillae half-circular in shape; nucleus centrally located; a single chloroplast cup-shaped; stigma large, elliptical or circular in shape; 2 contractile vacuoles at the base of flagella (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

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