Closterium sp. (ehrenbergii ?), x 100, x 200, Manzaki, Narita city, Chiba Pref., October 2000, by Y. Tsukii
Closterium ehrenbergii Meneghini var. ehrenbergii: Cell body large, swelled at center, tapered at both termini, 150-(176-323)-380 μm long, 15-(20-28)-40 μm wide, L/W= 4-6; cell wall smooth, colorless, with no bands; 5-8 pyrenoids in each chloroplast (Illustrations of The Japanese Fresh-water Algae, 1977).