Genus: Filament without branching; cell body cylindrical; two chloroplasts star-shaped;
tubes formed (or cell body fused) at conjugation; zygospore spherical or broad ellipsoidal formed within female gametangium
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Before and after cell division,
cell body 31, 62 μm long, 44 μm wide,
x 400, Tsukuba city, Ibaraki Pref., October 2000, collected by N. Kinoshita, photo by Y. Tsukii
50 μm 100 μm 150 μm; x 400
Zygnema excompressum Transeau: vegetative cells 32-80 μm long, 23-26 μm diam., 2 chloroplasts in each cell