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 Synechococcophycideae
                     Order Synechococcalesᵀ
                       Family Merismopediaceae Elenkin (1933)
                         Genus Synechocystis C. Sauvageau 1892 [ICBN]
                           Synechocystis aquatilis Sauvageau 1892
                           Synechocystis consortia Norris
                           Synechocystis endobiotica (A.A. Elenkin and M.M. Hollerbach) A.A. Elenkin and M.M. Hollerbach in A.A. Elenkin 1938
                           Synechocystis endophytica (G.M. Sm. 1920) Joosten (2006)
                           Synechocystis pevalekii Ercegovic 1925
                           Synechocystis salina Wislouch 1924