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

 Chlamydomonas monadina
Stein 1878 var. longirubra Ettl 1976
Syn: C. cingulata Pascher 1927

Chlamydomonas monadina Species: Cell body broad ellipsoidal or nearly spherical, 18-35 μm in diam.; papilla broad with flattened apex; chloroplast cup-shaped; a pyrenoid horseshoe-shaped, located beneath equatorial line or slightly posterior; stigma longitudinally elongated, thin, located at equator or slightly anterior; nucleus at anterior half of the cell body.
[ var. globulifera (Korschikoff) Korschikoff 1938]: Papilla narrower and more protruded; cellwall thick; with several pyrenoids irregular in shape.
[ var. perforata Vlk 1940]: Pyrenoid ring-form.
[ var. longirubra Ettl 1976]: Stigma large, elongated, stick-like in shape, longitudinally located at anterior half of the cell; papilla more broad and short; a pyrenoid elongated, curved as half-ring
(Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

Chlamydomonas monadina var. longirubra Ettl ?, cell body μm long, μm wide, L/W=, four contractile vacuoles at the base of flagella, x 640, Kanayama Green Park, Kiyose city, Tokyo, Japan, January 15, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Top view: flagella about 22 μm long,
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Focused at the center of the cell body (top view): a centrally-located nucleus visible, x 640
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Side view: cell body 20 μm long, 15-16 μm wide, L/W=1.3, flagella 22 μm long, a nucleus located at anterior half of the cell body, an elocated stigma above equator of the cell body, a dome-like papilla present, x 640
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