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

Haematococcus lacustris
(Girod) Rostafiniski, 1871
Syn: H. pluvialis Flotow, 1844

Haematococcus Genus: Unicellular, within a large spherical sheath; two equal-length flagella emerging from anterior end; cell body spherical or ellipsoidal, connected with gelatinous sheath by fine filaments; a single chloroplast cup-shaped, with several pyrenoids (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:

Haematococcus lacustris, stock Taa-2, prolonged axenic culture with KCM & Hyponex (August 31 to October 2, 2004), cell wall 30 μm long, 29 μm wide, cell body nearly spherical, 24 μm in diam., x 640, Akatsuka Park, Itabashi-ku, Tokyo, Japan, June, 2002 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
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