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 Gloeobacterales Caval.-Sm. (2002), nom. inval. see Order Gloeobacterales Cavalier-Smith 2002 nom. inval., nom. rej.
       1 Family Gloeobacteraceae Komárek & Anagn. (1995), nom. inval. [monotypic] see Family Gloeobacteraceae Komárek and Anagnostidis 1995 nom. inval.
       2 Family Anthocerotibacteraceae Strunecký & Mareš (2023) [monotypic] see Family Anthocerotibacteraceae Strunecký and Mareš 2023