Genus:
Cell body short, radiate in shape; apical view of the cell, triangular, polygonal,
ellipsoidal or spindle-shaped; zygospores formed outside of mother cells
(Illustrations of The Japanese Fresh-water Algae, 1977)
Subgenus: lacks arm-like projections
(Illustrations of The Japanese Fresh-water Algae, 1977)
Species:
Staurastrum mutilatum or S. punctulatum var. subproductum ?,
cell body 52 μm long, 48 μm wide, L/W=, isthmus 17 μm wide,
x 640, No.1, Kejo-numa, Furukawa-Ono, Osaki city (formerly Furukawa city), Miyagi Pref., Japan, October 29, 2006 by Y. Tsukii 31 μm
63 μm
94 μm; x 640
Images of collecting locality:
No.1, Kejo-numa, Furukawa-Ono, Osaki city (formerly Furukawa city), Miyagi Pref., Japan, October 29, 2006 by Y. Tsukii