#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
  supertype:  #class__clas  (biology) a taxonomic group containing one or more orders
  member of:  #division_Cyanophyta
  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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