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. 1990 stat. inval. [paraphyletic?]] see Domain Bacteria Woese et al. 2024
             [Superphylum "Terrabacteria" Battistuzzi et al. 2004 nom. nud.]
               [Phylum "Cyanobacteria" (ex Stanier 1974) Cavalier-Smith 2002 stat. inval. - cyanobacteria] see Phylum Cyanobacteriota Oren et al. 2022
                 [Class "Cyanobacteria" "Stanier 1974" nom. inval.] see Class Chroococcophyceae Hollerbach et al. 1953
                   [Family "Family 4.2" nom. inval.]
                     1 [Genus "Calothrix" Agardh ex Bornet and Flahault 1886 nom. inval.] see Genus Calothrix C.Agardh ex Bornet & Flahault (1886)
                     2 [Genus "Rivularia" Agardh ex Bornet and Flahault 1886 nom. inval.] see Genus Rivularia Agardh ex Bornet and Flahault 1886 nom. cons.
                     3 [Genus "Tolypothrix" Kützing ex Bornet and Flahault 1886 nom. inval.] see Genus Tolypothrix Kützing ex Bornet and Flahault 1886