image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum forficulatum
Lundell var. forficulatum

Staurastrum forficulatum 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 23 μm long, 20 μm wide (excluding spiny projections 7 μm), L/W=1.2, isthmus 9 μm wide, x 640, Watasuge marsh (or bog), Tsugaike highland (Tsugaike Natural Park), Otari village, Nagano Pref., Japan, August 11, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum Staurastrum

Images of collecting locality: Watasuge marsh (or bog), Tsugaike highland (Tsugaike Natural Park), Otari village, Nagano Pref., Japan, August 11, 2006 by Y. Tsukii

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