image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium acerosum
var. elongatum Brébisson

Closterium acerosum Species: 250-(396-576)-790 μm long, 25-(33-84) μm wide; cell body large, slightly curved; both termini tapered; pyrenoids 7-15 in each semicell (Illustrations of The Japanese Fresh-water Algae, 1977). Cell body slightly curved, gradually attenuated toward the truncated ends, which somewhat recurved due to the covexity of the inner margin near the ends; inner margin straight or slightly concave, outer margin convex, 300-500 μm long, 32-50 μm wide, L/W=9-14; cell wall smooth and colorless or sometimes delicately striated and yellowish-brown in color; chloroplasts with ridges containing 7-11 pyrenoids in central row (Photomicrographs of the Freshwater Algae, vol. 1, 1984).


Closterium acerosum var. elongatum Brébisson, cell body 636 μm long, 34 μm wide, L/W=18.7, x 100, x 200, x 400, x 640, Nogyo Fureai park (Agricultural friendship park), Ichinodai, Toride city, Ibaraki Pref., Japan, April 28, 2008 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium acerosum Closterium acerosum Closterium acerosum Closterium acerosum Closterium acerosum Closterium acerosum Closterium acerosum

Images of collecting locality: Nogyo Fureai park (Agricultural friendship park), Ichinodai, Toride city, Ibaraki Pref., Japan, April 28, 2008 by Y. Tsukii


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