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Chlorophyceae: Zygnematales: Mesotaeniaceae or Gonatozygaceae
(Gamophyceae: Zygnematales: Desmidiaceae)

Gonatozygon pilosum
var. echinatum Krieger

Gonatozygon pilosum Genus: Two chloroplasts plate-like or slightly spiralled; a nucleus centrally located between the chloroplasts; mostly unicells, filaments rare (Illustrations of The Japanese Fresh-water Algae, 1977).
Species [ var. pilosum ]: Cell body cylindrical 177-(180)-300 μm long, 10.5-15-(15.5) μm wide, L/W = 12-20, cell wall with fine hairy projections, both ends not swelled.
[ var. echinatum ]: Cell body narrower than v. pilosum, 96-140 μm long, 5-(5.5-7.5) μm wide, L/W = 15-20, (Illustrations of The Japanese Fresh-water Algae, 1977).

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Gonatozygon pilosum (or G. aculeatum ?), cell body 80 μm long, 5.5 μm wide, L/W = 14.5, cell wall with many short hairs, both ends slightly swelled, 2 chloroplasts present, 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
Gonatozygon Gonatozygon Gonatozygon
Gonatozygon Gonatozygon Gonatozygon Gonatozygon

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