Phylum Cyanobacteria Garcia-Pichel et al. (2020) see Phylum Cyanobacteriota Oren et al. 2022
   1 Class Vampirovibriophyceae Strunecký & Mareš (2023), orth. inval. see Class Vampirovibrionophyceae corrig. Strunecký and Mareš 2023
   2 Class Cyanophyceae Hauck (1885) see Class Chroococcophyceae Hollerbach et al. 1953