Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
                 Class "Cyanobacteria" Cavalier-Smith, 2002
                   Subclass Oscillatoriophycideae
                     Order Chroococcales Wettst. (1924)
                       Family Microcystaceae Elenkin (1933)
                         Genus Microcystisᵀ Lemmerm. (1907), nom. cons.
                           Microcystis flos-aquae (V.B. Wittrock in V.B. Wittrock and O. Nordstedt) O. Kirchner in A. Engler and H. Prantl 1898