Family: Filamentous algae without branching; cell body cylindrical; chloroplasts band-, plate- or star-shaped (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Filament without branching; cell body cylindrical; one or several chloroplasts band-shaped, spirally arranged within the cell, pyrenoids present; septum with or without folded structure (Guide book to the "Photomicrographs of the Freshwater Algae", 1998). About 300 species (Illustrations of The Japanese Fresh-water Algae, 1977).
S. majuscula
11 clips
6 chl. 1.5 turns
75 μm diam.
conjugation
Awayatsu park
Fujimi
Saitama, 2000
S. majuscula
10 clips
6 chl. 1.5 turns
75 μm diam.
conjugation
Awayatsu park
Fujimi
Saitama, 2000
S. majuscula
1 clip
6 chl. 1.5 turns
75 μm diam.
conjugation
Awayatsu park
Fujimi
Saitama, 2000
Syprogira sp.
2 clips
Awayatsu park
Fujimi
Saitama, 2000
Syprogira sp.
3 clips
Awayatsu park
Fujimi
Saitama, 2000