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. from crustose lichen (orange lichen, Caloplaca sp.),
cell body nearly spherical, 8-19 μm in diam.,
x 100, x 200, x 400, x 640, concrete wall, Hamasaki, Asaka city, Saitama Pref., Japan, May 30, 2004 by Y. Tsukii
150 μm; x 400 :
94 μm; x 640