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Gamophyceae: Desmidales: Mesotaeniaceae
(Charophyceae: Zygnematales: Mesotaeniaceae)

 Cylindrocystis gracilis
I.Hirn
Syn. C. brebissonii var. minor W. et G.S. West

Cylindrocystis brebissonii Genus: Two chloroplasts with axis and laminae structure; axis short, laminae also short making the chloroplasts star-shaped
Species: Cell body cylindrical, distinctly broader than 10 μm; chloroplasts with longitudinal, twisting ridges (Coesel & Meesters, 2007).
Similar genus -->> Zygnema; Penium; Mesotaenium;

Cylindrocystis gracilis (formerly, C. brebissonii var. minor) ?, cell body 40 μm long, 11 μm wide, L/W=3.6, x 640, a small pond at Kowashimizu, Suwa city, Nagano Pref., Japan, May 21, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cylindrocystis Cylindrocystis

Cylindrocystis brebissonii Meneghini var. brebisonii: Cell body cylindrical, large, 30-87 μm long, 14-35 μm wide, L/W= 2-4; zygospores rectangular (Illustrations of The Japanese Fresh-water Algae, 1977).

Cylindrocystis brebissonii var. jenneri (Ralfs) Hansgirg: Cell body cylindrical, large, 20-70 μm long, 11-23 μm wide; zygospores spherical (Illustrations of The Japanese Fresh-water Algae, 1977).

Cylindrocystis brebissonii var. minor W. et G.S. West: Cell body cylindrical, small, 20-30 μm long, 8-13 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Cylindrocystis crassa Debary: Cell body ellipsoidal, 20-60 μm long, 17-31 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

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