Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [[crown] organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           [Superkingdom Prokaryota]
             [Kingdom Bacteria Cavalier-Smith 2002 - bacteria] see Domain Bacteria Woese et al. 1990
               [Subkingdom Negibacteriaᵀ Cavalier-Smith 2002 - negibacteria] see Domain Bacteria Woese et al. 1990
                 [Infrakingdom Glycobacteriaᵀ Cavalier-Smith 2002] see Domain Bacteria Woese et al. 1990
                   [Division Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002] see Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002
                     [Subdivision Phycobacteriaᵀ Cavalier-Smith 2002] see Subphylum Phycobacteria Cavalier-Smith 2002
                       [Class Hormogoneae Cavalier-Smith 2002 - filamentous cyanobacteria] see Subclass Nostocophycideae
                         [Order Stigonematales (ex Geitler 1925) Cavalier-Smith 2002 nom. rej.] see Order Nostocales Cavalier-Smith 2002 nom. rej.
                           [Family Mastigocladaceae Geitler (1925)] see Family Hapalosiphonaceae Elenkin (1917), nom. cons.
                             1 [Subfamily Brachytrichioideae (E. Bornet & C. Flahault) F.E. Fritsch (1945)] see Family Symphyonemataceae Hoffmann, Komárek & Kaštovský (2005)
                             2 [Subfamily Mastigocladoideaeᵀ] see Family Hapalosiphonaceae Elenkin (1917), nom. cons.