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 Pseudanabaenales L. Hoffm., Komárek & Kaštovský (2005), nom. inval. see Order Pseudanabaenales Hoffmann et al. 2005 nom. nud.
       1 Family Thalassoporaceae Strunecký & Mareš (2023) [monotypic] see Family Thalassoporaceae Strunecký and Mareš 2023
       2 Family Pseudanabaenaceae Anagn. & Komárek (1988) see Family Pseudanabaenaceae Anagnostidis and Komárek 1988