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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium dianae
var. pseudodianae (Roy) Krieger

Closterium dianae Species [ var. dianae ]: Cell body slightly curved, tapered toward both ends, truncated with slanted edges, small pores present at outside of both termini, inner side at center slightly convex, 150-380 μm long, 15-40 μm wide, L/W = 10-12; cell wall smooth; chloroplasts with 5-8 pyrenoids in each chloroplast (Illustrations of The Japanese Fresh-water Algae, 1977).
Cell body 160-323 μm long, 20-28 μm wide, L/W=8.3-12; chloroplasts with about 6 laminae; semicells with 4-8 pyrenoids (Photomicrographs of the Freshwater Algae, vol. 6, 1987).

Closterium dianae var. pseudodianae (Roy) Krieger (or var. dianae ?), cell body 292 μm long, 15 μm wide, L/W=19.5, x 200, x 400, x 640, wetland near Ichinose-enchi (along super forest road), Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium Closterium Closterium Closterium

Closterium dianae var. pseudodianae (Roy) Krieger (or var. dianae ?), cell body 160 μm long, 13 μm wide, L/W=12.3, x 640, wetland at Ichinose-enchi, Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium dianae

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