Nostoc jelly ball
Nostoc with gelatin
Nostoc with gelatin, living
Nostoc with heterocysts
Nostoc filament with heterocyst
Anabaena, possibly with both akinetes and heterocyst
Anabaena with akinetes and heterocysts well differentiated
Oscillatoria filament
Oscillatoria filaments
Gleocapsa
Gleocapsa
Gleocapsa closeup
Gleotrichia
Merismopedia
fossil cyanobacteria colony

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