Species [var. pachydermum]: Cell body 78-117 μm long, 60-87 μm wide, isthmus 25-34 μm wide, semicells semielliptical in shape, corners rounded.
[var. aethiopicum W. et G.S. West ]: Semicells nearly half-circle; cellwall thin; cell body 64-107 μm long, 56-80 μm wide, isthmus 28-34 μm wide.
[var. ellipticum Hinode ]: Semicells rectangular at base; curvature of lateral margins weak compared to var. pachydermum; cell body 94-100 μm long, 67-74 μm wide, isthmus 28-34 μm wide.
[var. heptagonum Grönblad ]: Semicells irregular pentagon in shape; posterior half of lateral margins nearly straight; cell body 94-100 μm long, 67-74 μm wide, isthmus 28-34 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Google Image Search

var. ellipticum: Semicells rectangular at base; 94-100 x 67-74 μm
C. pachydermum var. ellipticum ? 96 x 67 μm Naruto Chiba, 2003	C. pachydermum var. ellipticum ? 96 x 71 μm Univ. A.V.M. Obihiro Hokkaido, 2005	C. pachydermum var. ellipticum ? 114 x 65 μm Imou bog Toyohashi Aichi, 2004	C. pachydermum var. ellipticum ? 120 x 74 μm Imou bog Toyohashi Aichi, 2006
C. pachydermum var. ellipticum ? μm Yamamuro m.8 Maibara Shiga, 2008
var. pachydermum: Semicells semielliptical in shape, corners rounded; 78-117 x 60-87 μm
C. pachydermum var. pachydermum 112 x 82 μm Dojo-ike Norikura highland Nagano, 2007
C. pachydermum var. pachydermum 74 x 57 μm Yamagata, 1999	C. pachydermum var. pachydermum 78 x 58 μm Aizu Recreation p. Aizuwakamatsu Fukushima, 2005	C. pachydermum var. pachydermum 65 x 50 μm Omine-numa Tsukiyono Gunma, 2003	C. pachydermum var. pachydermum 64 x 52 μm Omine-numa Tsukiyono Gunma, 2006
C. pachydermum var. pachydermum 77 x 58 μm Myoyo Fukiage Saitama, 2004	C. pachydermum var. pachydermum 90 x μm Iida-shinden Nishi-ku Saitama, 2004	C. pachydermum var. pachydermum 88 x 56 μm Saitama, 1999	C. pachydermum var. pachydermum 83 x 62 μm Myoyo Fukiage Saitama, 2004
C. pachydermum var. pachydermum 82 x 63 μm Norin Park Kawamoto Saitama, 2004	C. pachydermum var. pachydermum 78 x 55 μm Omiya Saitama, 2001	C. pachydermum or C. lundellii ? 70 x 54 μm Hasuda Saitama, 2002	C. pachydermum var. pachydermum 82 x 62 μm Narita Chiba, 2000
C. pachydermum var. pachydermum 72 x 57 μm Imori pond Myoko highland Niigata, 2004	C. pachydermum var. pachydermum 80 x 60 μm Junichogata Himi Toyama, 2006
C. pachydermum var. pachydermum 85 x 65 μm near Uehara-ike Ueda Nagano, 2006	C. pachydermum var. pachydermum 98 x 70 μm Karakemi marsh 1 Omachi Nagano, 2007	C. pachydermum var. pachydermum 78 x 59 μm Lake Nojiri Shinano Nagano, 2004
C. pachydermum var. pachydermum 105 x 77 x μm Ichinose-enchi Norikura highland Nagano, 2005	C. pachydermum var. pachydermum 65? x 55 μm Ichinose-enchi Norikura highland Nagano, 2005	C. pachydermum var. pachydermum 69 x 55 μm Maimeno-ike Norikura highland Nagano, 2006
C. pachydermum var. pachydermum 78 x 58 μm Koigakubo marsh Tessei-cho Okayama, 2004	C. pachydermum var. pachydermum 67-73 x 57-58 μm Tennoh Tessei-cho Okayama, 2004	C. pachydermum var. pachydermum μm near Yamakado m. Nishi-Azai Shiga, 2008
var. aethiopicum: Semicells nearly half-circle; cellwall thin; 64-107 x 56-80 μm
C. pachydermum var. aethiopicum ? μm Kahan Park Kuroiso Tochigi, 2003
var. ??:
C. pachydermum ? μm Omine-numa Tsukiyono Gunma, 2003	C. pachydermum ? chloroplasts unique 90 x 60 μm Koshigaya Saitama, 2001

Similar species -->> C. lundellii;

Please click on species name for more images.

Copyright Protist Information Server