Genus: Unicellular; two equal-length flagella emerging from anterior end;
cell body flat, broad ovoidal, lateral view spindle-shaped, within a gelatinous sheath quadrangular in shape;
a single chloroplast plate-like, with 4-6 pyrenoids
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Pteromonas multipyrenoidea Lemmermann, daughter cells after cell division in mother cellwall,
cell body μm long, μm wide,
x 640, standing water under Akigase bridge, Akigase park, Saitama city, Saitama Pref., Japan, February 27, 2005 by Y. Tsukii
31 μm 63 μm 94 μm; x 640