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

 Chlamydomonas sp.

Chlamydomonas Genus: Two flagella of equal length inserted close together into an anterior papilla of variable shape usually directed anteriorly; chloroplast form variable; usually 2 contractile vacuoles; cell division producing 2-8 zoospores; sexual reproduction usually isogamous, anisogamy and oogamy known but rare; > 500 species, mostly fresh water (Illustrated Guide, 1985). A large chloroplast; stigma; a single nucleus; two contractile vacuoles anterior (Kudo, 1966).
Species:

Chlamydomonas sp. (or Chloromonas ?), cell body ellipsoidal 16 μm long, 12 μm wide, a small conical papilla present, pyrenoid located at posterior half of the cell body, stigma at equator ?, nucleus at anterior half of the cell body, x 640, drainage ditch exit, Ta-gawa (Ta river), Kawanago, Kaminokawa town, Tochigi Pref., Japan, May 4, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Chlamydomonas Chlamydomonas Chlamydomonas

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