Species: Cell body cylindrical ellipsoid, slightly constricted at the center, 60-(68-76)-79 μm long, 40-(43-54) μ wide, isthmus 38-(41-52) μm wide; semicells semi-elliptical, slightly flattened at the apex, with 2 pyrenoids (Illustrations of The Japanese Fresh-water Algae, 1977).
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C. westii ?
71 x 40 μm
Tsuchiura
Ibaraki, 2003
C. westii ?
62 x 36 μm
Kinchakuda
Hidaka
Saitama, 2004
C. westii ?
67 x 38 μm
61 x 37 μm
Riverside green l.
Sawara
Chiba, 2004
C. westii ?
68 x 40 μm
near Kurome River
Asaka
Saitama, 2006
C. westii ?
μm
near Kurome River
Asaka
Saitama, 2008
