Subgenus [Eucosmarium]: Cell body dorso-ventrally compressed, with strong constriction at the center, transverse section elliptical or diamond-shaped.
Section [ Cyclidium ]: Cell surface smooth; semicells half circle, half ellipsoid (Illustrations of The Japanese Fresh-water Algae, 1977).
Species[ ]: Cell body medium in size, 98-102 μm long, 56-62 μm wide, L/W=1.5, isthmus 20-25 μm wide; (Illustrations of The Japanese Fresh-water Algae, 1977).
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C. pandriforme ?
64 x 41 μm
L/W=1.6
Yukawa-numa
Nishiwaga
Iwate, 2007
C. pandriforme ?
68 x 43 μm
69 x 42 μm
Omine-numa
Tsukiyono
Gunma, 2003
C. pandriforme ?
62 x 40 μm
Omine-numa
Tsukiyono
Gunma, 2003
C. pandriforme ?
63 x 40 μm
Omine-numa
Tsukiyono
Gunma, 2003
C. pandriforme ?
56-71 x 34-42 μm
L/W=1.6
Omine-numa
Minakami
Gunma, 2006
C. pandriforme ?
μm
L/W=
Omine-numa 5
Minakami
Gunma, 2007.10
C. pandriforme ?
62 x 40 μm
L/W=1.6
Oze-ga-hara
Katashina
Gunma, 2006
C. pandriforme ?
μm
L/W=
Kareki-numa
Nikko
Tochigi, 2008
C. pandriforme ?
59 x 37 μm
L/W=1.6
Watasuge marsh
Tsugaike highland
Nagano, 2005
C. pandriforme ?
72 x 43 μm
Kashibaru marsh 6
Karatsu
Saga, 2006
C. pandriforme ?
72 x 43 μm
Kashibaru marsh 5
Karatsu
Saga, 2006
C. pandriforme ?
μm
Kashibaru m.II
Karatsu
Saga, 2008