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 Spirulinales Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014) see Order Spirulinales Komárek et al. 2014
       Family Spirulinaceae Hoffmann, Komárek & Kaštovský (2014) see Family Spirulinaceae (Gomont 1892) Hoffmann et al. 2014
         Genus Halospirulina U. Nübel, F. Garcia-Pichel & G. Muyzer (2000) see Genus Halospirulina Nübel et al. 2000