Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum muticum
Brébisson ex Ralfs

Staurastrum muticum 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: Cell body 22-(26-34)-43.5 μm long, 21-(23.7-31)-37.5 μm wide; constriction 7.5-(8.4-9.8)-12 μm wide; cell wall smooth (Illustrations of the Fresh-water Algae, 1977).
Similar species -- >> S. lapponicum f. lapponicum;

Staurastrum muticum Brébisson, cell body 40 μm long, 37 μm wide, isthmus 12 μm wide, x 640, Koyama River near Joetsu-shinkansen railway bridge, Kurizaki, Honjo city, Saitama Pref., Japan, April 15, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum punctulatum Staurastrum punctulatum

Images of collecting locality: Koyama River near Joetsu-shinkansen railway bridge, Kurizaki, Honjo city, Saitama Pref., Japan, April 15, 2006 by Y. Tsukii

Please click on images for viewing enlarged
Copyright Protist Information Server