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Chlorophyceae: Chlorococcales: Scenedesmaceae (or Dictyosphaeriaceae ?)

 Pectodictyon pyramidale
Akiyama & Hirose

Pectodictyon Genus: Cells arranged three-dimentionally; cell body spherical or triangular pyramid in shape (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Colonies of 8 or 4 cells connected with each other by gelatinous filaments, daughter colonies form a complex colony of 64 or 16 cells; cell body triangular pyramid in shape, 8-12 μm in diam.; (Illustrations of The Japanese Fresh-water Algae, 1977).

Pectodyction pyramidale Akiyama & Hirose, cell body μm long, μm wide, x 640, Lake Kawaguchi, Fuji-Kawaguchiko town, Yamanashi Pref., Japan, December 2001 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
Pectodyction pyramidale Pectodyction pyramidale Pectodyction pyramidale

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