Gamophyceae:
Zygnematales: Desmidiaceae
Staurastrum gracile
Ralfs var ornatum Krieger
Species [ var. gracile ]:
Cell body 28-47 μm long, 39-77 μm wide (including arms), isthmus 8.4-11 μm;
[ var. coronulatum Boldt ]:
Cell body 26-28 μm long, 34-41 μm wide (including arms), isthmus 6.5-10 μm;
[ var. ornatum Krieger ]:
Cell body 38.7 μm long, 62.4 μm wide (including arms), isthmus 13 μm;
a pair of warts present at each posterior margin of semicells
(Illustrations of The Japanese Fresh-water Algae, 1977)
|
Staurastrum gracile Ralfs var. gracule ?,
cell body 19 μm long, 24 μm wide, L/W=,
x 640, a small pond near Yamaguchi university, Yamaguchi city, Yamaguchi Pref., November 21, 2004, by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Staurastrum gracile Ralfs var gracile:
Cell body 28-47 μm long (including arms),
39-77 μm wide (including arms),
isthmus 8.4-11 μm wide;
in apical view, small 4 knob-like structures at each side
(Illustrations of The Japanese Fresh-water Algae, 1977)
Staurastrum gracile var. coronulatum Boldt:
Cell body 26-28 μm long (including arms),
34-41 μm wide (including arms),
isthmus 6.5-10 μm wide;
in apical view, 2 knob-like structures at each side, each knob with a slight depression
(Illustrations of The Japanese Fresh-water Algae, 1977)
Staurastrum gracile var. ornatum Krieger:
Cell body 38.7 μm long (including arms),
62.4 μm wide (including arms),
isthmus 13 μm wide;
in apical view, a couple of knob-like structures at each side
(Illustrations of The Japanese Fresh-water Algae, 1977)
Please click on images for viewing enlarged
Copyright
Protist Information Server