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

Gonatozygon pilosum
var. echinatum Krieger

Gonatozygon 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).

Gonatozygon pilosum var. echinatum, cell body 181 μm long, 4.7 μm wide, L/W= 38.5, cell wall with many short projections, x 400, x 640, Uruguay, November 1999, photo by Yuuji 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

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