Family: Filamentous algae without branching; cell body cylindrical; chloroplasts band-, plate- or star-shaped (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Filamentous algae without branching; a single plate-like chloroplast in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Mougeotia sp. 1 clips μm Japan, 199?

Mougeotia sp. 2 clips μm Tokyo, 199?