Species [var. subtumidum]: Cell body (28-39)-40 μm long, 21-33.6 μm wide, isthmus 7-(8.5-14) μm wide; apex flat, wide.
[var. rotundum Hirano ]: Cell body 29-30 μm long, 21 μm wide, isthmus 7 μm wide.l apex rounded.
[var. klebsii (Gutwinski) W. et G.S. West ]: Cell body 31-47 μm long, 31-43 μm wide, isthmus 8.5-12 μm wide; apex flat, narrow.
[f. minor Ström ]: Cell body 11-25 μm long, 11-20 μm wide, isthmus 4.2-5.6 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977). (Illustrations of The Japanese Fresh-water Algae, 1977).

Google Image Search

var. subtumidum: Apex flat, wide, 28-40 μm long, 21-34 μm wide
C. subtumidum var. subtumidum 37 x 29,30 μm Iroha-numa 2,4 Zao mountain Yamagata, 2006	C. subtumidum var. subtumidum 39 x 30 μm Iroha-numa 3 Zao mountain Yamagata, 2006	C. subtumidum var. subtumidum μm Iroha-numa 4 Zao mountain Yamagata, 2008	C. subtumidum var. subtumidum 27 x 22 μm Ishinazaka Furukawa Miyagi, 2003
C. subtumidum var. subtumidum 32 x 31 μm Kejo-numa 1 Osaki Miyagi, 2006	C. subtumidum var. subtumidum 41 x 31 μm Miyatoko m.5 Minami-Aizu Fukushima, 2008	C. subtumidum var. subtumidum μm Yokotashiro 3 Katashina Gunma, 2007	C. subtumidum ? var. subtumidum ? 34 x 28 μm Watarase river Ashikaga Tochigi, 2004
C. subtumidum var. subtumidum μm Kareki-numa Nikko Tochigi, 2008	C. subtumidum var. subtumidum 40 x 29 μm Shimo-muneoka Shiki Saitama, 2004	C. subtumidum var. subtumidum 35 x 30 μm Shijuhachi-ike 4 Shiga highland Nagano, 2006
var. klebsii: Apex flat, narrow, 31-47 μm long, 31-43 μm wide
C. subtumidum var. klebsii 41 x 34 μm Omine-numa Minakami Gunma, 2006	C. subtumidum var. klebsii ? μm Omine-numa Minakami Gunma, 2007	C. subtumidum var. klebsii 50 x 40 μm near Omine Mt. Minakami Gunma, 2007	C. subtumidum ? var. klebsii ? 43 x 36 μm Ohnuma Nasu-shiobara Tochigi, 2006
C. subtumidum var. klebsii ? 32 x 26 μm Tama river Chofu Tokyo, 2004	C. subtumidum var. klebsii ? 25 x 20 μm Takezono-higashi p. Tsukuba Ibaraki, 2003	C. subtumidum ? var. klebsii ? 38 x 30 μm Iruma river Sayama Saitama, 2004	C. subtumidum var. klebsii ? 49 x 43 μm 45 x 37 μm 41 x 37 μm Hiroshima, 1998
C. subtumidum ? var. klebsii ? 48 x 40 μm Hiroshima, 1998
var. rotundum: Apex rounded, 29-30 μm long, 21 μm wide
C. subtumidum ? var. rotundum ? 34 x 29 μm riverside park Abukuma river Fukushima, 2005	C. subtumidum var. rotundum ? 32 x 25 μm Saitama, 2001	C. subtumidum ? var. rotundum ? 48 x 44 μm Japan, 1999
f. minor: Cell body small, 11-25 μm long, 11-20 μm wide
C. subtumidum f. minor ? 28 x 20 μm Saitama, 1999	C. subtumidum f. minor ? 21 x 16 μm Oze s.k.m. Oze-ga-hara Gunma, 2006	C. subtumidum f. minor 19 x 14 μm Univ. A.V.M. Obihiro Hokkaido, 2005	C. subtumidum f. minor 21 x 19 μm Iroha-numa 1 Zao mountain Yamagata, 2006

Similar species -- >> C. punctulatum (Margaritiferae);

Please click on species name for more images.

Copyright Protist Information Server