Species [ var. dianae ]: Cell body slightly curved, tapered toward both ends, truncated with slanted edges, small pores present at outside of both termini, inner side at center slightly convex, 150-380 μm long, 15-40 μm wide, L/W = 10-12; cell wall smooth; chloroplasts with 5-8 pyrenoids in each chloroplast (Illustrations of The Japanese Fresh-water Algae, 1977).
Cell body 160-323 μm long, 20-28 μm wide, L/W=8.3-12; chloroplasts with about 6 laminae; semicells with 4-8 pyrenoids (Photomicrographs of the Freshwater Algae, vol. 6, 1987).
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Similar species -->> C. venus ( < 85 μm ); C. calosporum; C. parvulum; C. leibleinii; C. moniliferum;
var. dianae : 150-380 x 15-40 μm; L/W=10-12; sighlty swelled at the center; 5-8 pyrenoids/chl. ![]()
v. dianae
23 samples
145-260 x μm
L/W=10-13
2004-2007![]()
v. dianae
23 samples
145-260 x μm
L/W=10-13
2004-2007![]()
v. dianae
23 samples
145-260 x μm
L/W=10-13
2004-2007![]()
v. dianae
23 samples
145-260 x μm
L/W=10-13
2004-2007var. dianae (?) : L/W less than 10 ![]()
v. dianae
10 samples
130-190 x μm
L/W=7.0-10.0
2001-2006![]()
v. dianae
10 samples
130-190 x μm
L/W=7.0-10.0
2001-2006![]()
v. dianae
10 samples
130-190 x μm
L/W=7.0-10.0
2001-2006![]()
v. dianae
10 samples
130-190 x μm
L/W=7.0-10.0
2001-2006var. pseudodianae : More slender; 135-300 x 12-22 μm; L/W=16-23; pyrenoids/chl. ![]()
v. pseudodianae
11 samples
144-460 x μm
L/W=13-16
2004-2006![]()
v. pseudodianae
11 samples
144-460 x μm
L/W=13-16
2004-2006![]()
v. pseudodianae
11 samples
144-460 x μm
L/W=13-16
2004-2006![]()
v. pseudodianae
11 samples
144-460 x μm
L/W=13-16
2004-2006var. arcuatum : Smaller and more strongly curved; 135-300 x 12-22 μm; L/W=9-12 ![]()
v. arcuatum
310 x 22 μm
L/W=14.1
Kumakubo
Nasu-shiobara
Tochigi, 2005![]()
v. arcuatum
or C. C. ralfsii ?
281 μm
L/W=12
T. tapered, Tv. large
Japan, 1998![]()
v. arcuatum ?
or C. ralfsii ?
160-205 x 16-19 μm
L/W=9.4-12.8
Ohori-ike
Fukuoka, 2001var. minus : Smaller than var. dianae; -150 x -15 μm; ![]()
v. minus
24 samples
100-145 x μm
L/W=8-14
2003-2007![]()
v. minus
24 samples
100-145 x μm
L/W=8-14
2003-2007![]()
v. minus
24 samples
100-145 x μm
L/W=8-14
2003-2007![]()
v. minus
24 samples
100-145 x μm
L/W=8-14
2003-2007var. ??? : ![]()
C. dianae ?
band present
117 x 15 μm
L/W=7.8
Omine-numa
Tsukiyono
Gunma, 2003