Genus: Cell body crescent in shape (long, curved, tapered at both ends); cross section rounded;
cell wall smooth or with longitudinal lines, bands on the cell wall in some species;
chloroplast laminae ridged and radially arranged, which makes cross section star-shaped;
pyrenoids aligned or scattered
Species: Cell body elongated spindle-shaped, μm long, μm wide, L/W=
;
Closterium pronum ,
cell body 227 μm long, 6 μm wide, L/W=37.8,
x 400, x 640, No.3, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
No.3, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii