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 Nostocaceaeᵀ Eichler (1886)
                         Subfamily Nostocoideaeᵀ
                           Genus Nostocᵀ Vaucher ex Bornet & Flahault (1888)
                             Nostoc calcicola Brébisson ex Bornet and Flahault 1888
                             Nostoc communeᵀ Vaucher ex Bornet & Flahault 1888 [ICBN]
                             Nostoc edaphicum Kondrateva 1962
                             Nostoc linckia (Roth) Bornet and Thur.
                             Nostoc muscorum C.Agardh [ICBN]
                             Nostoc planctonicum Poretzky and Tschernow 1929
                             Nostoc punctiforme (F.T. Kützing) ex Hariot 1891 [ICBN]
                             Nostoc sphaericum J.P.É. Vaucher ex Bornet and Flahault 1886-1888[1888]