Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               [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 Spirulinaceaeᵀ 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