Species: Cell body small in size, 21-25 μm long (excluding spines), 18.3-24 μm wide
(excluding spines), L/W=1.25-1.3, isthmus 6-9 μm wide; semicells elongate elliptical in
lateral view, apex flat, each corner rounded, with 2-3 spiny projections, additionally 6-8 spiny projections
surrounding around the corners; spines present at the base of the semicells;
apical view triangle- or rectangle-shaped
(Illustrations of The Japanese Fresh-water Algae, 1977)
|
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
No.7, Ryugahara marsh, Chokai mountain, Yuri-Honjo city, Akita Pref., Japan, September 29, 2008 by Y. Tsukii
