Freshwater green algae in dozens of genera form minute, prostrate branched filaments composed of uninucleate cells. Examples include Acrochaete (also known as Entocladia), Aphanochaete, Chaetophora, Gongrosira, and Pseudendoclonium. Also, the common freshwater macroalgal genus Stigeoclonium has species that form Coleochaete-like prostrate filament systems. None of these algae, however, have sheathed setae or eggs/cysts surrounded by a jacket of sterile cells.
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