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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium dianae
Ehrenberg ex Ralfs 1848

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).
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var. dianae (?) : L/W less than 10
Closterium dianae
v. dianae
190 x 24 μm
170 x 21 μm
L/W=8.1-10.0
Igashira park
Mooka
Tochigi, 2004
Closterium dianae
v. dianae
160 x 17 μm
L/W=9.4
Kuroiso Park
Kuroiso
Tochigi, 2003
Closterium dianae
v. dianae
155 x 17 μm
L/W=9.1
Lake Shirakaba
Tateshina & Chino
Nagano, 2005
Closterium
v. dianae
or C. tumidulum ?
130 x 16 μm
L/W=8.4
Saitama, 2001
Closterium dianae
v. dianae
190 x 24 μm
L/W=7.9
Iruma river
Kawagoe
Saitama, 2004
Closterium
v. dianae
152 x 20 μm
L/W=7.6
Koigakubo marsh
Tessei-cho
Okayama, 2004
Closterium
v. dianae ?
150 x 20 μm
L/W=7.5
Imori pond
Myoko highland
Niigata, 2004
Closterium
v. dianae ?
145, 170, 178 μm
L/W=7.3
Minuma-tanbo
Urawa
Saitama, 2001
Closterium dianae
v. dianae
160 x 17 μm
L/W=9.4
Lake Tanuki
Fujinomiya
Shizuoka, 2006
Closterium dianae
v. dianae
148 x 16 μm
L/W=9.3
near Omine mt.
Minakami
Gunma, 2006
Similar species -->> C. venus ( < 85 μm ); C. calosporum; C. parvulum; C. leibleinii; C. moniliferum;

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Closterium dianae
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