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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 : 150-380 x 15-40 μm; L/W=10-12; sighlty swelled at the center; 5-8 pyrenoids/chl.
Closterium dianae
v. dianae
23 samples
145-260 x μm
L/W=10-13
2004-2007
Closterium dianae
v. dianae
23 samples
145-260 x μm
L/W=10-13
2004-2007
Closterium dianae
v. dianae
23 samples
145-260 x μm
L/W=10-13
2004-2007
Closterium dianae
v. dianae
23 samples
145-260 x μm
L/W=10-13
2004-2007
var. dianae (?) : L/W less than 10
Closterium dianae
v. dianae
10 samples
130-190 x μm
L/W=7.0-10.0
2001-2006
Closterium dianae
v. dianae
10 samples
130-190 x μm
L/W=7.0-10.0
2001-2006
Closterium dianae
v. dianae
10 samples
130-190 x μm
L/W=7.0-10.0
2001-2006
Closterium
v. dianae
10 samples
130-190 x μm
L/W=7.0-10.0
2001-2006
var. pseudodianae : More slender; 135-300 x 12-22 μm; L/W=16-23; pyrenoids/chl.
Closterium dianae
v. pseudodianae
11 samples
144-460 x μm
L/W=13-16
2004-2006
Closterium
v. pseudodianae
11 samples
144-460 x μm
L/W=13-16
2004-2006
Closterium dianae
v. pseudodianae
11 samples
144-460 x μm
L/W=13-16
2004-2006
Closterium dianae
v. pseudodianae
11 samples
144-460 x μm
L/W=13-16
2004-2006
var. arcuatum : Smaller and more strongly curved; 135-300 x 12-22 μm; L/W=9-12
Closterium dianae
v. arcuatum
310 x 22 μm
L/W=14.1
Kumakubo
Nasu-shiobara
Tochigi, 2005
Closterium
v. arcuatum
or C. C. ralfsii ?
281 μm
L/W=12
T. tapered, Tv. large
Japan, 1998
Closterium
v. arcuatum ?
or C. ralfsii ?
160-205 x 16-19 μm
L/W=9.4-12.8
Ohori-ike
Fukuoka, 2001
var. minus : Smaller than var. dianae; -150 x -15 μm;
Closterium dianae
v. minus
24 samples
100-145 x μm
L/W=8-14
2003-2007
Closterium dianae
v. minus
24 samples
100-145 x μm
L/W=8-14
2003-2007
Closterium dianae
v. minus
24 samples
100-145 x μm
L/W=8-14
2003-2007
Closterium
v. minus
24 samples
100-145 x μm
L/W=8-14
2003-2007
var. ??? :
Closterium
C. dianae ?
band present
117 x 15 μm
L/W=7.8
Omine-numa
Tsukiyono
Gunma, 2003
Similar species -->> C. venus ( < 85 μm ); C. calosporum; C. parvulum; C. leibleinii; C. moniliferum;

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Closterium dianae
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