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 "Cyanobacteria" Cavalier-Smith, 2002
                   Subclass Nostocophycideae
                     Order Nostocalesᵀ Borzì (1914)
                       Family Stigonemataceae Borzì (1886), nom. cons.
                         Genus Stigonemaᵀ C.Agardh ex Bornet & Flahault (1887)
                           Stigonema hormoides (F.T. Kützing) ex Bornet and Flahault 1886-1888[1887]
                           Stigonema informe Kützing
                           Stigonema minutum (C.Agardh) A.H. Hassall ex Bornet & Flahault 1886-1888[1887] [ICBN]
                           Stigonema panniforme (C.A. Agardh) ex Bornet and Flahault 1886-1888[1887]