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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).

Haematococcus sp. ?, cell body nearly spherical, 19 μm long, 20 μm wide, two flagella about 25 μm long, x 640, Sansui-tei (Japanese Restaurant), Tsukuba city, Ibaraki Pref., Japan, July 2002 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
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