Protist Movie Database

Chlorophyta: Gamophyceae: Zygnematales: Desmidiaceae

Closterium acerosum
(Schrank) Ehrenberg ex Ralfs, 1848

Genus: Cell body crescent in shape (long, curved, tapered at both ends); cross section rounded; cell wall smooth or with longitudinal lines, bands on the cell wall in some species; chloroplast laminae ridged and radially arranged, which makes cross section star-shaped; pyrenoids aligned or scattered (Illustrations of The Japanese Fresh-water Algae, 1977).
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 (or C. turgidum ??), tape No. 0056, time code 1040, cell body 550 μm long, 48 μm wide, Uruguay, November 1999, photo by Yuuji Tsukii

Please click on species name for viewing movies.
Copyright 1995-2007 Protist Information Server