Genus: Solitary or colonial; body surface delicate; one to two chloroplasts; usually with a stigma;
fresh water (Kudo, 1966).
One to several chloroplasts; pyrenoid and/or eyespot (stigma) in some; cells naked, globular,
ellipsoidal or pyriform (Illustrated Guide, 1985).
Images of collecting locality:
Rice field near Kibagata Park, Komatsu city, Ishikawa Pref., Japan, November 16, 2007, by Y. Tsukii