#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
  supertype:  eubacteria__eubacterium__truebacteria  a large group of bacteria having rigid cell walls; motile types have flagella
  member of:  class_Cyanobacteria
  subtype:  nostoc  found in moist places as rounded jellylike colonies
  subtype:  trichodesmium  large colonial bacterium common in tropical open-ocean waters; important in carbon and nitrogen fixation

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