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has evolved is in the cyanobacteria, often known as blue-green algae for their blue-green (cyan) coloration. They are classified as the phylum Cyanobacteriota or Cyanophyta. However, this phylum also includes two classes of non-photosynthetic bacteria: Melainabacteria (also called Vampirovibrionia or Vampirovibrionophyceae) and Sericytochromatia

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