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Gamophyceae: Zygnematales: Desmidiaceae

Xanthidium antilopaeum
(Brébisson) Kützing var. antilopauem

Xanthidium 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).

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Xanthidium antilopaeum (Brébisson) Kützing var. antilopauem, semicells with 4 spines (2 anterior, 2 basal), cell wall at the center of semicells thickened and punctated ?, cell body 71 μm long, 61 μm wide, isthmus 18.7 μm wide, spines slightly curved upward 25 μm long, x 400, x 640, Hiroshima Pref., Japan, October 1998, 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
Xanthidium Xanthidium Xanthidium Xanthidium

X. antilopaeum (Brébisson) Kützing var. antilopauem, semicells with 4 spines (2 anterior, 2 basal), cell wall at the center of semicells thickened and punctated ?, cell body μm long, μm wide, constriction μm wide, spines slightly curved upward μm long, x 400, x 640, Hiroshima, Japan, October 1998, 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
Xanthidium Xanthidium
Xanthidium Xanthidium Xanthidium Xanthidium

X. antilopaeum (Brébisson) Kützing 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).

X. antilopaeum var. laeve Schmidle: Cell body 79-90 μm long, 62-79 μm wide, constriction 20-34 μm wide, spines 19-22 μm long, semicells with 4 spines (2 anterior, 2 basal), cell wall at the center of semicells without thickened and punctated (Illustrations of The Japanese Fresh-water Algae, 1977).


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