Xanthidium antilopaeum (BREB.) KÜTZ. var. crameri GRÖNBLAD
The cells are a little wider than long and octagonal in coarse shape. The central cut is deep and extends strongly outwards. The cell halves are oblong hexagonal with straight or weakly concave sides, the vertices are broadly truncated. At each lateral and apical angle a pair of long pricks originate. Above the center is a flat, often slightly brown colored swelling of the cell wall occupies with small warts.
Length without pricks 50 - 60 µm, width without pricks 58 - 63 µm.
Occurrence: In littoral zones of mountain lakes in Central Europe rather rarely.
Image copyright: Prof. Rupert Lenzenweger, image used under license to MBL (micro*scope).
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