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 Cyanobacteriota Oren et al. 2022
                 Class Chroococcophyceaeᵀ Hollerbach et al. 1953
                   Order Spirulinales Komárek et al. 2014
                     Family Spirulinaceaeᵀ (Gomont 1892) Hoffmann et al. 2014
                       1 Genus Glaucospira Lagerheim 1892
                       2 Genus Halospirulina Nübel et al. 2000
                       3 Genus Spirulinaᵀ Turpin ex Gomont 1892
                       4 Genus Thermospirulina Moro et al. 2021