Genus: Subaerial algae or a algal component of lichens; unicells; cell body 10-15 μm in diam.,
chlorplast(s) star-shaped or aggregated, with a single pyrenoid at the center
(Illustrations of The Japanese Fresh-water Algae, 1977).
Trebouxia sp., stock Ikk-1, axenic culture with KCM and Hyponex medium,
cell body ~30 μm in diam.,
x 400, x 640, Kaga city, Ishikawa Pref., Japan, 2000 by Y. Tsukii
94 μm; x 640