Species: Colonies forming a slightly curved square or rhomboid, up to 65-90 μm in width;
cell body up to 18-20 μm in diam.
(Photomicrographs of the Freshwater Algae, vol. 2, 1984).
Gonium pectorale Müller, colonies of 8 cells,
young colony 36 μm wide, mature colony 50 μm wide,
mature cell body ellipsoidal, 14 μm long, 12 μm wide,
chloroplast cup-shaped, a pyrenoid posterior,
x 640, near Todoroki green land, Kawasaki city, Kanawaga Pref., Japan, May 26, 2004 by Y. Tsukii
31 μm
63 μm
94 μm; x 640