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

Haematococcus lacustris
(Girod) Rostafiniski, 1871 (Syn.: H. pluvialis Flotow, 1844) (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000)
Haematococcus pluvialis Flotow 1844 em. Wille 1903 (Syn.: H. lacustris (Girod) Rostafinski 1871) (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

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: Cell body ovoid or spherical, 40-50 μm in diam.; with many pyrenoids (Illustrations of The Japanese Fresh-water Algae, 1977).

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Haematococcus lacustris (Girod) Rostafiniski, cell body 18 μm long, 14 μm wide, flagella 29 μm long, test 27 μm long, 23 μm wide, 2 equal-length flagella, a large chlroplast, anterior papilla, x 400, x 640, Japan, September 5, 1999, courtesy of N. Kinoshita, 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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