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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium margaritiferum
Meneghini ex Ralfs 1848

Species: Cell body elliptical, 50-(56-60) μm long, 42-(48-56) μm wide, isthmus 13-(15-17) μm wide, L/W=1.3; semicells pyramid-shaped with flattened apex, basal corner broadly rounded, both sides convex with wavy margin (about 10-13 waves or granules), apex flat (waves/granules absent); cell wall covered with uniformely arranged granules interspersed by small pores, side view elliptical; chloroplasts with 2 pyrenoids in each semicell (Illustrations of The Japanese Fresh-water Algae, 1977).
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Cosmarium margaritiferum
C. margaritiferum
66 x 55 μm
L/W=1.2
Onnenai
Kushiro marsh
Hokkaido, 2005
Cosmarium margaritiferum
C. margaritiferum
66 x 53 μm
L/W=1.2
Oyomi marsh
Hakuba
Nagano, 2006
Cosmarium margaritiferum
C. margaritiferum
60 x 50 μm
L/W=1.1
Kejo-numa 1
Osaki
Miyagi, 2006
Cosmarium margaritiferum
C. margaritiferum
60 x 48 μm
L/W=1.3
near Akai wetland
Aizuwakamatsu
Fukushima, 2005
Cosmarium margaritiferum
C. margaritiferum
67-70 x 51-53 μm
L/W=1.3
near Karakemi marsh
Omachi
Nagano, 2005
Cosmarium
C. margaritiferum
69 x 55 μm
L/W=1.3
Shiken-zaike
Kamikawa
Saitama, 2004
Cosmarium margaritiferum
C. margaritiferum
68 x 55 μm
L/W=1.2
Myoyo
Fukiage
Saitama, 2004
Cosmarium margaritiferum
C. margaritiferum
67 x 59 μm
L/W=1.2
Furuike marsh
Togakushi highland
Nagano, 2005
Cosmarium margaritiferum
C. margaritiferum
65 x 58 μm
L/W=1.3
Watarase Wetland
Fujioka
Tochigi, 2005
Cosmarium
C. margaritiferum
64 x 50 μm
58 x 46 μm
Kahan koen
Kuroiso
Tochigi, 2004
Cosmarium margaritiferum
C. margaritiferum
63 x 50 μm
Igashira park 3
Mooka
Tochigi, 2008
Cosmarium margaritiferum
C. margaritiferum
63 x 56 μm
L/W=1.1
General Athletic p.
Utsunomiya
Tochigi, 2006
Cosmarium margaritiferum
C. margaritiferum
62 x 50 μm
L/W=1.2
Senuki
Nasu
Tochigi, 2004
Cosmarium margaritiferum
C. margaritiferum
63 x 51 μm
L/W=
Ushiku-numa mp.
Ryugasaki
Ibaraki, 2008
Cosmarium margaritiferum
C. margaritiferum
64 x 53 μm
L/W=1.2
Norin Park
Kawamoto
Saitama, 2004
Cosmarium margaritiferum
C. margaritiferum
61 x 50 μm
L/W=1.2
Kodama town
Saitama, 2003
Cosmarium
C. margaritiferum
two pyrenoids
62 x 48 μm
L/W=1.3
Nishi-Urawa
Saitama, 2003
Cosmarium margaritiferum
C. margaritiferum
61 x 51 μm
L/W=1.2
Konuma
Sakado
Saitama, 2004
Cosmarium margaritiferum
C. margaritiferum
65 x 48 μm
L/W=1.4
near carnivorous p. c.
Sanmu
Chiba, 2006
Cosmarium margaritiferum
C. margaritiferum
54-63 x 44-50 μm
L/W=1.2-1.3
near Takao-sakura p.
Kitamoto
Saitama, 2005
Cosmarium
C. margaritiferum
two pyrenoids
56 x 43 μm
59 x 43 μm
57 x 48 μm
54 x 45 μm
Kurihashi
Saitama, 2001
Cosmarium
C. margaritiferum
59 x 51 μm
L/W=1.2
Uruguay, 1999
Cosmarium margaritiferum
C. margaritiferum
58 x 48 μm
L/W=1.2
Watarase river
Ashikaga
Tochigi, 2004
Cosmarium margaritiferum
C. margaritiferum
59 x 46 μm
L/W=1.3
Aizu Recreation p.
Aizuwakamatsu
Fukushima, 2005
Cosmarium
C. margaritiferum
57 x 50 μm
L/W=1.1
near Seaside Botanical g.
Himi
Toyama, 2006
Cosmarium
C. margaritiferum
55 x 45 μm
L/W=1.2
Miyashiro
Saitama, 2003
Cosmarium
C. margaritiferum
55 x 47 μm
L/W=1.2
Senganpi Suigo p.
Saitama, 2005
Cosmarium margaritiferum
C. margaritiferum
47-53 x 38-48 μm
L/W=
Umi-no-nakamichi
Fukuoka, 2001
Cosmarium
C. margaritiferum
or C. vexatum ?
53 x 48 μm
L/W=1.1
Yasuji-kawa
Sawara
Chiba, 2004
Cosmarium
C. margaritiferum
two pyrenoids
50 x 43 μm
50 x 45 μm
L/W=1.1, 1.2
Saitama, 1999
Cosmarium margaritiferum
C. margaritiferum
stock Skg-1
42-51 x 34-45
two pyrenoids
Koshigaya
Saitama, 2001
Cosmarium
C. margaritiferum ?
52 x 45 μm
L/W=1.2
Tochigi, 1997
Cosmarium margaritiferum
C. margaritiferum
50 x 42 μm
51 x 44 μm
Senjo-ga-hara
Nikko
Tochigi, 2003
Cosmarium margaritiferum
C. margaritiferum
50 x 44 μm
L/W=1.1
Konpira bridge
Shirakawa
Fukushima, 2003
Cosmarium margaritiferum
C. margaritiferum
50 x 41 μm
L/W=1.1
water reservoir
Yamaguchi Univ.
Yamaguchi, 2004
Cosmarium
C. margaritiferum
49 x 49 μm
L/W=1.0
Tajima
Fukushima, 2004
Cosmarium
C. margaritiferum
two pyrenoids
49 x 41 μm
L/W=1.2
Shiraoka
Saitama, 2003
Cosmarium
C. margaritiferum ?
48 x 43 μm
L/W=1.1
Koshigaya
Saitama, 2001
Cosmarium margaritiferum
C. margaritiferum
μm
Medaka-ike
Nakatsugawa
Gifu, 2008
Similar species -->> C. ochthodes (65-94 μm); C. intermedium; C. botrytis; C. vexatum; C. pachydermum;

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Cosmarium margaritiferum
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