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 Nostocophycideae
                     Order Nostocalesᵀ Borzì (1914)
                       1.1 Family Microchaetaceae Lemmermann (1907)
                       1.2 Family Nostocaceaeᵀ Eichler (1886)
                       1.3 Family Rivulariaceae Kützing (1843)
                       1.4 Family Scytonemataceae F.T. Kützing ex O. Kirchner in A. Engl. & H. Prantl (1898)
                       2.1 Family Borzinemataceae L. Geitler (1942)
                       2.2 Family Chlorogloeopsidaceae (Mitra) Mitra & Pandey (1967)
                       2.3.1 Family Hapalosiphonaceae Elenkin (1917), nom. cons.
                       2.3.2 Family "Symphyonemataceae" Hoffmann, Komárek & Kaštovský (2005)
                       2.4 Family Loriellaceae Geitler (1925)
                       2.5 Family Stigonemataceae Borzì (1886), nom. cons.