Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
                 [Class Hormogoneae Thuret (1875) - filamentous cyanobacteria] see Class Hormogoneae Cavalier-Smith 2002
                   2 [Order "Stigonematales" Geitler (1925)] see Order Stigonematales (ex Geitler 1925) Cavalier-Smith 2002 nom. rej.