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. (photobiont of lichen Caloplaca sp., orange lichen),
cell body μm long, μm wide,
x 640, concrete wall, Tenjin, Kaminokawa town, Tochigi Pref., Japan, May 4, 2004 by Y. Tsukii
94 μm; x 640