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Chlorophyceae: Tetrasporales: Gloeococcaceae
Chlamydophyceae: Tetrasporales: Palmellopsidaceae (Palmellaceae)

 Asterococcus superbus
(Cienkowski, 1865) Scherffel, 1909

Asterococcus Genus: Planktonic; unicellular or colony of 4, 8, or 16 cells; both cells and its colony covered with layers of mucous sheath; cell body spherical; cell wall smooth; a single chloroplast star-shaped, with a pyrenoid located at the center (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Cell body spherical, 15-20 μm in diam.; a single chloroplast star-shaped, with a pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).

Asterococcus superbus, stock Tts-5, axenic culture with KCM and Hyponex, from December 14, 2001 to January 9, 2002, cell body 12-24 μm long, 11-21 μm wide, two contractile vacuoles present, chloroplasts radiating from the center of the cell body, flagella seems to be absent, x 640, Showa Memorial Park, Tachikawa-ku, Tokyo, Japan, November 2001 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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Asterococcus ?, stock Tts-5, axenic culture with KCM and Hyponex, from January 9, 2002 to February 2, 2002, cell body μm long, μm wide, x 640, Showa Memorial Park, Tachikawa-ku, Tokyo, Japan, November 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
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Asterococcus ?, cell body μm long, μm wide, two contractile vacuoles present, no eyespot (stigma), x 640, Showa Memorial Park, Tachikawa-ku, Tokyo, Japan, November 2001 by Y. Tsukii
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