Species: Cell body small in size, 25.8-32.8 μm long, 25.8-33.6 μm wide,
isthmus 7-11 μm wide; semicells elliptical diamond- or spindle-shaped in side view,
upper side of lateral margins more convex than lower ones; apical view triangular with concaved margins,
each corner truncated; cell wall covered with granules arranging circularly aroung the corners
(Illustrations of The Japanese Fresh-water Algae, 1977)
Staurastrum dispar Brébisson ?,
cell body 33 μm long, 30 μm wide, L/W=1.1, isthmus 11 μm wide,
x 640, No. 8-1, Mida-ga-hara (bog/marsh), Gassan (mountain), Tsuruoka city (formerly Haguro town) & Shonai town (formerly Tachikawa town), Yamagata Pref., Japan, August 3, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
No. 8, Mida-ga-hara (bog/marsh), Gassan (mountain), Tsuruoka city (formerly Haguro town) & Shonai town (formerly Tachikawa town), Yamagata Pref., Japan, August 3, 2006 by Y. Tsukii