Species [ var. pseudoexiguum ]: Cell body small, L/W=2 or more, with deep constriction; semicells nearly rectangle in shape; apex and lateral margins slightly convexed; 18-25 μm long, 10-13.6 μm wide, isthmus 2-4 μm wide.
[ var. retusum Hirano ] Semicells trapezoid in shape; lateral margins nearly straight, narrowed toward apex; anterior half of the margins slanted and slightly concaved; 22-23 μm long, 12-13 μm wide, isthmus 3.4 μm wide.
[ var. hexagonum Grönblad ] Semicells hexagonal in shape, broadened toward apex; 18-19.6 μm long, 10.7-12.6 μm wide, isthmus 3-4.3 μm wide.
Google Image Search
C. pseudoexiguum 26 x 16 μm Univ. A.V.M. Obihiro Hokkaido, 2005 |
C. pseudoexiguum ? 18 x 12 μm Mida-ga-hara Gassan (mt) Yamagata, 2006  |
C. pseudoexiguum 22 x 12-13 μm Omine-numa Tsukiyono Gunma, 2003 |
C. pseudoexiguum ? μm near Omine mt. Minakami Gunma, 2007 |
C. pseudoexiguum 22 x 13 μm Maimeno-ike Norikura highland Nagano, 2006 |
C. pseudoexiguum 26 x 15.5 μm Lake Tanuki Fujinomiya Shizuoka, 2006 |
