image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium pyramidatum
Brébisson in Ralfs

Cosmarium pyramidatum Species: Cell body 58-(64.5-95)-100 μm long, (42-56)-62 μm wide, isthmus (14-19)-20 μm wide, L/W=1.5; semicells pyramidal in shape, with flattened apex, basal corner rounded, side and apical view elliptical; cell wall dotted (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -- >> C. pseudopyramidatum;

Cosmarium pyramidatum Brébisson in Ralfs, cell body 83 μm long, 47 μm wide, isthmus 18 μm wide, L/W=1.8, x 400, x 640, Uruguay, November 1999, photo by Yuuji Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium Cosmarium

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