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 Oscillatoriales Schaffner (1922), sedis mutabilis] see Order Oscillatoriales Schaffner 1922
                     [Family Oscillatoriaceaeᵀ Engl. (1898), nom. cons.] see Family Oscillatoriaceae Engler 1898 nom. cons.
                       ?[Genus Phormidium Kütz. ex Gomont (1892)] see Genus Phormidium Kützing ex Gomont 1892
                         [Phormidium amphibium (C.A. Agardh ex M. Gomont) K. Anagnostidis and J. Komárek 1988] see Geitlerinema amphibium (C.A. Agardh ex M. Gomont) K. Anagnostidis 1989