image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum forficulatum
Lundell var. forficulatum

Staurastrum 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;

Staurastrum forficulatum Lundell var. forficulatum or S. senarium ?, cell body 28 μm long, 27 μm wide, L/W=1.0, isthmus 11 μm wide, x 640, Ushidome-ike (pond), Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum
Cell body ? μm long, 26 μm wide, L/W=, isthmus ? μm wide, x 640
Staurastrum Staurastrum Staurastrum

Please click on images for viewing enlarged.
Copyright Protist Information Server