Order: Filamentous algae without branching; cell body mostly cylindrical.
Family: Cellwall shows H shape in transverse section;
chloroplasts reticulatedwithout pyrenoids.
Genus: Same as family.
Species:
Microspora sp.,
cell body 11-22 μm long, 12 μm wide, L/W=0.9-1.8,
x 640, Karakemi marsh, Yasaka village, Nagano Pref., Japan, November 23, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640