Gonatozygon

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

 Gonatozygon pilosum
var. echinatum Krieger





Family [Gonatozygaceae]: Cell body cylindrical, slightly swelled at both ends, loosely attached with each other to form a filament; cell wall consists of a single partition, two layers, with small pores, covered with dots, granules or short spines; chloroplast ribbon-like, with many aligned pyrenoids.
Genus: Chloroplasts plate-like or slightly spiralled, centrally placed (Illustrations of The Japanese Fresh-water Algae, 1977).

Gonatozygon pilosum var. echinatum, 181 μm long, x 400, x 640, Uruguay Nov. 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 pilosum var. echinatum Krieger: cell body cylindrical 96-140 μm long, 5-(5.5-7.5) μm wide, L/W = 15-20, cell wall covered with many fine hairs, both ends slightly swelled (Illustrations of The Japanese Fresh-water Algae, 1977).

Gonatozygon pilosum Wolle var. pilosum: cell body cylindrical 177-(180)-300 μm long, 10.5-15-(15.5) μm wide, L/W = 12-20, cell wall covered with many hairly spines, both ends slightly swelled (Illustrations of The Japanese Fresh-water Algae, 1977).

Gonatozygon monotaenium De Bary: cell body cylindrical (74-145)-284 μm long, 7.5-(9)-11.5 μm wide, L/W = 10-25, cell wall with many granules, both ends slightly swelled (Illustrations of The Japanese Fresh-water Algae, 1977).

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