Gamophyceae: 
Zygnematales: Desmidiaceae or Closteriaceae
Closterium lunula
(Müller) Nitzsch var. lunula
 
Species [var. lunula] : Cell body large, 
250-(430-552)-1000 μm long, 47-(73-89)-120 μm wide, 
L/W=5-8; inner-side nearly straight, outer-side convex; 
tapered at both termini (broad circle, slightly inversed);  cell wall smooth, transparent, without bands; 
chloroplasts with many pyrenoids.  
[var. biconvexum Schmidle]: Inner-side also convex; 
455-603 μm long, 85-126 μm wide, 
(Illustrations of The Japanese Fresh-water Algae, 1977). 
 | 
Closterium lunula (Müller) Nitzsch var. lunula, 
cell body 540 μm long, 74 μm wide, L/W =7.3, 
x 100, x 200, x 400, x 640, Kaga city, Ishikawa Pref., Japan, October 2000, by Y. Tsukii
 50 μm
 100 μm
 150 μm; x 400 : 
 31 μm
 63 μm
 94 μm; x 640
Closterium lunula var. lunula, 
cell body 536 μm long, 72 μm wide, L/W =7.4, 
x 100, x 200, x 400, x 640, Kaga city, Ishikawa Pref., October 2000, by Y. Tsukii
 50 μm
 100 μm
 150 μm; x 400 : 
 31 μm
 63 μm
 94 μm; x 640
A dividing cell ?, 
cell body 540 μm long, 70 μm wide, L/W =7.7, 
Please click on images for viewing enlarged.
Copyright  
Protist Information Server