image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Euastrum humerosum
Ralfs

Euastrum Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)
Species: Cell body 95-132 μm long, 56-70 μm wide, L/W=1.7, isthmus 15.4-22 μm wide; upper lateral lobes mamillate and projected obliquely upward, located slightly anterior from the middle line of semicells; a single pore present at the center of semicells (Illustrations of The Japanese Fresh-water Algae, 1977).

Euastrum humerosum Ralfs var. ??, semicell 57 μm long, 54 μm wide, L/W=, isthmus ?? μm wide, x 640, Goyo-no-izumi (fountain), Shimogo town, Fukushima Pref. (boundary at Nasu-shiobara city, Tochigi Pref.), Japan, June 25, 2006, collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum Euastrum
Cell body 98 μm long, 55 μm wide, L/W=1.8, isthmus 17 μm wide, x 640
Euastrum Euastrum

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