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Chlorophyta: Gamophyceae: Zygnematales: Desmidiaceae

Xanthidium antilopaeum
(Brébisson) Kützing var. antilopauem

Genus: Variable in shape; strong constriction at center; semicell ellipsoidal, polygonal, etc.; cell wall with simple or branching spines, most of them laterally aligned; 4 plate-like chloroplasts in each semicell; one or more pyrenoids in each chloroplast (Illustrations of The Japanese Fresh-water Algae, 1977).
Species (var. antilopauem) : Cell body 45-72 μm long, 43-71 μm wide, L/W = 1, constriction 13-25 μm wide, spines 19-22 μm long, semicells with 4 spines (2 anterior, 2 basal), cell wall at the center of semicells thickened and punctated (Illustrations of The Japanese Fresh-water Algae, 1977).

Xanthidium antilopaeum (Brébisson) Kützing var. antilopauem, tape No. 0040, time code 0946, Hiroshima University, Hiroshima city, Hiroshima Pref. Japan, September 28, 1998 by Y. Tsukii

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