Genus: Planktonic; colony of 16 (or more) cells within a thin gelatinous sheath; cell body sickle-shaped,
connected with each other by gelatinous filaments and arranged at the periphery of the sheath;
a single chloroplast plate-like, with a pyrenoid
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: |
31 μm
63 μm
94 μm; x 640
Selenodictyum lunaris (Kirchner) Moebius: Colonies of 4-32 cells within a gelatinous matrix, cells crescent in shape, termini rounded, 8-12 μm long, 3-6 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).
Selenodictyum obesa (W. West) Schmidle: Similar to K. lunaris but more spherical, 5-6 μm diam. (Illustrations of The Japanese Fresh-water Algae, 1977).
Selenodictyum acuminata Hirose et Akiyama: Colonies within a gelatinous matrix, cells crescent in shape, termini tapered, 25-30 μm long, 8-10 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).