Order & Family:
Filamentous algae; cell division occurs near septum and adds "apical cap"
(folded structure near the septum) ; cell body cylindrical, laterally straight or wavy or
swell at one end of the cell body ("capitellate") in some species;
chloroplasts reticulated with many pyrenoids;
asexual reproduction by zoospore; sexual reproduction by fertilization by egg and sperm;
monoecious or dioecious.
Genus: linear filament without branching (Illustrations of The Japanese Fresh-water Algae, 1977).
cell body 105 μm long, 13-16 μm wide, L/W=,
x 400, x 640, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 by Y. Tsukii
31 μm 63 μm 94 μm; x 640
Cell body 120 μm long, 8-17 μm wide, L/W=, x 640
Images of collecting locality:
No. 1, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 by Y. Tsukii