#division_Cyanophyta__Cyanophyta  prokaryotic organisms sometimes considered a class or phylum or subkingdom; coextensive with the Cyanophyceae: cyanobacteria (blue-green algae)
  supertype:  #division.biological_group  (biology) a group of organisms forming a subdivision of a larger category
  member of:  #division_Eubacteria
  member:  #class_Cyanobacteria__Cyanophyceae__class_Cyanophyceae  photosynthetic bacteria found in fresh and salt water, having chlorophyll a and phycobilins; once thought to be algae: blue-green algae
     member:  #cyanobacteria__blue-green_algae  predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll; occur singly or in colonies in diverse habitats; important as phytoplankton
     member:  #family_Nostocaceae__Nostocaceae  blue-green algae
        member:  #genus_Nostoc  type genus of the family Nostocaceae: freshwater blue-green algae
           member:  #nostoc  found in moist places as rounded jellylike colonies
     member:  #family_Oscillatoriaceae__Oscillatoriaceae  blue green algae
        member:  #genus_Trichodesmium  a genus of blue-green algae
           member:  #trichodesmium  large colonial bacterium common in tropical open-ocean waters; important in carbon and nitrogen fixation

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