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).

Google Image Search

var. minus : Smaller than var. dianae; -150 x -15 μm;
v. minus 125,138 x 12-13 μm Sukawa highland Kurikoma mountain Akita, 2005	v. minus 130 x 11 μm Iroha-numa Zao mountain Yamagata, 2005	v. minus 122-137 x μm Iroha-numa Zao mountain Yamagata, 2006
v. minus or C. calosporum ? 115 x 13 μm L/W=8.8 near Akai wetland Aizuwakamatsu Fukushima, 2005	v. minus or C. calosporum ? 110 x 9 μm L/W=12.2 Aizu Recreation p. Aizuwakamatsu Fukushima, 2005
v. minus or C. tumidulum ? 125 x 16 μm Senuki Nasu Tochigi, 2004	v. minus or v. brevius ? 125 x 19 μm Numappara marsh Kuroiso Tochigi, 2003	v. minus 122 x 11 μm Numappara marsh Nasu-shiobara Tochigi, 2007	v. minus 100 x 11 μm Senjo-ga-hara Nikko Tochigi, 2003
v. minus 110,118 x 12 μm Hazama marsh Ashikaga Tochigi, 2006
v. minus or C. calosporum ? 116 x 11 μm Omine-numa Tsukiyono Gunma, 2003	v. minus or C. calosporum ? 116 x 11 μm Omine-numa 6 Minakami Gunma, 2007	v. minus 144 x 13 μm L/W=11.1 Numa-no-hara m. Madarao highland Niigata, 2006	v. minus 128 x 11 μm L/W=11.6 Imori pond Myoko highland Niigata, 2004
v. minus 145 x 10 μm L/W=14.5 Karakemi marsh Omachi Nagano, 2006	v. minus 133 x 11 μm L/W=12.1 Maimeno-ike Norikura highland Nagano, 2006	v. minus or C. calosporum ? 133 x 10 μm L/W=13.3 Ichinose-enchi Norikura highland Nagano, 2005	v. minus or C. calosporum ? 105 x 10 μm L/W=10.3 Ichinose-enchi Norikura highland Nagano, 2006
v. minus or C. calosporum ? 120 x 11.5 μm L/W=10.4 Mi-ike 3 Norikura highland Nagano, 2007	v. minus 153 x 11 μm L/W=13.9 Mi-ike 2 Norikura highland Nagano, 2007
v. minus 133 x 12.5 μm 142 x 13 μm Kodanuki marsh Fujinomiya Shizuoka, 2006	v. minus ? or C. calosporum ? 140 x 12 μm Imou marsh Toyohashi Aichi, 2006	v. minus 104 x 11 μm Omotsubo m.1 Niimi Okayama, 2006	v. minus or C. calosporum ? 117 x 11 μm Koigakubo marsh Tessei-cho Okayama, 2004

Similar species -->> C. venus ( < 85 μm ); C. calosporum; C. parvulum; C. leibleinii; C. moniliferum;

Please click on species name for more images.

Copyright Protist Information Server