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The Chroococcales are an order of cyanobacteria in some classifications which includes the harmful algal bloom Microcystis aeruginosa.[2] Molecular data indicate that the members of the Chroococcales may not be a clade.[citation needed]

Microcystis aeruginosa.jpeg
Microcystis aeruginosa
Scientific classification edit
Domain: Bacteria
Phylum: Cyanobacteria
Class: Cyanophyceae
Subclass: Oscillatoriophycideae
Order: Chroococcales
von Wettstein von Westerheim


The order is characterized by single, floating cells or colonies which are embedded to a matrix. Also, a lack of differentiation between apical and basal structures exists.[3]


  1. ^ Komárek J, Kaštovský J, Mareš J, Johansen JR (2014). "Taxonomic classification of cyanoprokaryotes (cyanobacterial genera) 2014, using a polyphasic approach" (PDF). Preslia. 86: 295–335.
  2. ^ "Chroococcales". EOL. Retrieved 24 June 2011.
  3. ^ "Chroococcales". Digital Specimen Archives. Protist Information Server. Retrieved 24 June 2011.