image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium parvulum
Brébisson

Cosmarium Species: Cell body small, (20-22)-42 μm long, (10.5-11)-17 μm wide, L/W=2-2.5; slightly depressed at the center; semicells gradually attenuated toward apex, lateral margins nearly straight, apex flat with rounded corners; cell wall smooth (Illustrations of The Japanese Fresh-water Algae, 1977).

Cosmarium parvulum Brébisson (or C. cucurbita ?), cell body 41 μm long, 18 μm wide, isthmus 16 μm wide, L/W=2.6, x 640, Hakama marsh (or bog), Madarao highland (Niigata & Nagano Pref.), Myoko village, Niigata Pref., Japan, May 15, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium parvulum
Cell body 41 μm long, 18 μm wide, isthmus 16 μm wide, L/W=2.3, x 640
Cosmarium parvulum Cosmarium parvulum

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