Genus: Two chloroplasts with axis and laminae structure; axis short, laminae also short making the chloroplasts star-shaped
Species: Cell body cylindrical, distinctly broader than 10 μm; chloroplasts with longitudinal, twisting ridges (Coesel & Meesters, 2007).
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Cell body cylindrical in shape, 10-14 μm in width; L/W=2
C. gracilis
32 x 14 μm
L/W=
Hachiman-numa 1
Hachimantai
Iwate, 2007
C. gracilis
24,29 x 12 μm
L/W=
Kakuman-buchi
Akagi mountain
Gunma, 2005
C. gracilis
23 x 12 μm
L/W=
Kinchakuda
Hidaka
Saitama, 2004
C. gracilis
40 x 11 μm
L/W= 3.6
Kowashimizu
Suwa
Nagano, 2005
C. gracilis
54,61 x 11 μm
L/W=
Kowashimizu
Suwa
Nagano, 2007
C. gracilis
35-51 x 13-14 μm
L/W= 2.7
near Karakemi marsh
Omachi
Nagano, 2005
C. gracilis
39-50 x 15 μm
L/W= 2.6-3.3
Numa-no-hara m.
Madarao highland
Niigata, 2005
C. gracilis
57 x 14 μm
38 x 13 μm
Omine-numa
Tsukiyono
Gunma, 2003
C. gracilis
41 x 14 μm
Iroha-numa 2
Zao mountain
Yamagata, 2006
C. gracilis ?
37-80 x 12 μm
Koigakubo marsh
Tessei-cho
Okayama, 2004
C. gracilis ?
40 x 11.5 μm
Kodanuki marsh
Fujinomiya
Shizuoka, 2006
Similar genus -->> Zygnema; Penium; Mesotaenium;