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)

Similar species -- >> S. sexangulare;

31 μm 63 μm 94 μm; x 640

Staurastrum forficulatum Lundell var. forficulatum, cell body 35 μm long, 30 μm wide (excluding spines), isthmus 10 μm wide, dichotonous spiny projections 8 μm long, x 640, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, May 8, 2006 by Y. Tsukii
31 μm 63 μm 94 μm; x 640

Images of collecting locality: Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, May 8, 2006 by Y. Tsukii