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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium lunula
(O.F. Müller) Nitzsch ex Ralfs 1848

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).
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var. lunula: Inner-side straight, 250-1000 μm long, 47-120 μm wide
Closterium lunula
var. lunula
486-502 x 82-89 μm
L/W=5.7-5.9
Onnenai
Kushiro marsh
Hokkaido, 2005
Closterium lunula
var. lunula
490 x 91 μm
L/W=5.4
Tashirodaira m.
Hakkoda mountain
Aomori, 2005
Closterium lunula
var. lunula
600 x 88 μm
L/W=6.8
Imori pond
Myoko highland
Niigata, 2004
Closterium lunula
var. lunula
530 x 80 μm
L/W=6.6
Nozomiko 2
Myoko highland
Nagano, 2007

var. lunula
540 x 74 μm
L/W=7.3
Kaga
Ishikawa, 2000
Closterium lunula
var. lunula
840 x 119 μm
L/W=7.9
Kabuto-yama
Nishi-no-miya
Hyogo, 2004
Closterium lunula
var. lunula
680 x 85 μm
L/W= 8.0
USA, 1999
Closterium lunula
var. lunula
μm
L/W=
pond near R272
Minakami
Gunma, 2008
Closterium lunula
var. lunula
μm
L/W=
Chojabaru
Kokonoe
Oita, 2008
Closterium lunula
var. lunula
μm
L/W=
Motoyu marsh
Nikko
Tochigi, 2008
var. biconvexum: Inner-side covex, 455-603 μm long, 85-126 μm wide
Closterium lunula
var. biconvexum
660 x 106 μm
L/W=6.2
Mizunashi-Yachi
Komado marsh
Fukushima, 2007
Closterium lunula
var. biconvexum
825 x 118 μm
L/W=7.0
Nasu-shiobara
Tochigi, 1998
Movies
Closterium acerosum
var. biconvexum
μm
Numappara m.1
Nasu-shiobara
Tochigi, 2007
Closterium lunula
var. biconvexum
434 x 87 μm
L/W=5.0
Ikei-no-ike
Nasu
Tochigi, 2006
Closterium lunula
var. biconvexum
584 x 82 μm
L/W=7.1
Igashira park
Mooka
Tochigi, 2006
Closterium lunula
var. biconvexum
874 x 119 μm
L/W=7.3
Japan, 1998
Closterium lunula
var. biconvexum
610 x 90 μm
L/W=6.8
Azami-ike
Norikura highland
Nagano, 2006
Closterium lunula
var. biconvexum
μm
L/W=
Ko-numa
Minakami
Gunma, 2008
Closterium lunula
var. biconvexum
470 x 94 μm
L/W=5.0
Kodanuki marsh
Fujinomiya
Shizuoka, 2006
Closterium lunula
var. biconvexum
825 x 113 μm
L/W=7.3
Hiroshima, 1998
Movies
Closterium lunula
var. biconvexum
300 x 50 μm
460 x 78 μm
L/W=5.9-6.0
USA, 1999
Closterium lunula
var. lunula ?
492 x 88 μm
L/W=5.6
Iyari marsh 2
Omachi
Nagano, 2008
Similar species -->> C. ehrenbergii;

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Closterium lunula
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