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 Oscillatoriales Schaffner (1922) see Order Oscillatoriales Schaffner 1922
       1 Family Oscillatoriaceae Engl. (1898), nom. cons. see Family Oscillatoriaceae Engler 1898 nom. cons.
       2 Family Microcoleaceae Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014), nom. illeg. see Family Microcoleaceae (Hansgirg 1888) Strunecký et al. 2013
       x ?Family Aerosakkonemataceae Strunecký & Mareš (2023) see Family Aerosakkonemataceae Strunecký and Mareš 2023