Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               [Phylum Cyanobacteria Garcia-Pichel et al. (2020)] see Phylum Cyanobacteriota Oren et al. 2022
                 [Class Cyanophyceae Hauck (1885)] see Class Chroococcophyceae Hollerbach et al. 1953
                   [Order "Synechococcales" Hoffmann, Komárek & Kaštovský (2005), nom. inval.] see Order Synechococcales Hoffmann et al. 2005 nom. nud.
                     [Family Prochlorococcaceae Komárek & Strunecký (2020)] see Family Prochlorococcaceae Komárek and Strunecký 2020
                       [Genus "Cyanobium" Rippka & Cohen-Baz. (1983), nom. inval.] see Genus Cyanobium Rippka and Cohen-Bazire 1983 nom. inval.
                         Cyanobium diatomicola (L. Geitler) J. Komárek J. Kopecký and V. Cepák 1999
                         Cyanobium gaarderii (Alvik) Komárek et al. (1999)
                         "Cyanobium gracile"ᵀ Rippka & Cohen-Baz. (1983), nom. inval.
                         Cyanobium parvum (E.F.A.W. Migula) J. Komárek J. Kopecký and V. Cepák 1999
                         Cyanobium plancticum (G. Drews H. Prauser and D. Uhlmann) J. Komárek J. Kopecký and V. Cepák 1999