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

(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).

Haematococcus lacustris, stock Tks-1, cell body 17-26 μm long, 13-20 μm wide, two flagella 27 μm long, x 640, Nasu-shiobara city (formerly Kuroiso city), Tochigi Pref., Japan, March 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Haematococcus Haematococcus Haematococcus Haematococcus
Haematococcus Haematococcus
Cysts ?
Haematococcus Haematococcus

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