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 Oscillatorialesᵀ Elenkin (1934)
                       Family Phormidiaceae Anagnostidis & Komárek (1988)
                         Subfamily Microcoleoideae Hansgirg (1892)
                           1 Genus Hydrocoleum F.T. Kützing ex Gomont (1892)
                           2 Genus Lyngbyopsis N.L.Gardner (1927)
                           3 Genus Microcoleusᵀ J.B.H.J. Desmazières ex M. Gomont 1892 [ICBN]
                           4 Genus Sirocoleum Kützing ex Gomont (1892)
                           5 Genus Symplocastrum (Gomont) O. Kirchner in A. Engl. & H. Prantl (1898)