Subgenus: lacks arm-like projections Section [ Stellatiformes ]: Semicells with lines of spines (Illustrations of The Japanese Fresh-water Algae, 1977) Species [ var. forficulatum ]: Cell body medium in size, 40-47.6 μm long, 37-60 μm wide (excluding spines), marginal projections present at both anterior and posterior sides of semicells, corner projections with dichotomous spines. [ var. verrucosum ]: Cell body 39-45 μm long, 37-42 μm wide (excluding spines) corner projections with trichotomous spines (Illustrations of The Japanese Fresh-water Algae, 1977) |
31 μm
63 μm
94 μm; x 640
Staurastrum forficulatum Lundell var. forficulatum or similar species,
cell body 30 μm long, 26 μm wide (excluding spines), L/W=1.2, isthmus 11 μm wide,
x 640, Ushidome-ike (pond), Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
