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. antilopaeum) :
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 51 μm long (excluding spines), 51 μm wide, isthmus μm wide,
x 640, Omuta-ike (pond), Kasuga city, Fukuoka Pref., Japan, October 2001 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
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 51 μm long (excluding spines), 51 μm wide,
x 640, Omuta-ike (pond), Kasuga city, Fukuoka Pref., Japan, October 2001 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
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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