living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryotae see Superkingdom Prokarya
     Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
       Division Cyanophycota see Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002
         Class Cyanophyceae Schaffner (1909) see Class Cyanobacteria Cavalier-Smith, 2002
           Order Nostocales Borzì (1914)
             Family Nostocaceae Eichler (1886)
               1 Genus Anabaena Bory 1822 ex Bornet & Flahault 1886 nom. cons. [ICBN]
               2 Genus Aphanizomenon C. Morren ex É. Bornet & C. Flahault 1886-1888[1888] [ICBN]
               3 Genus Nostoc Vaucher ex Bornet & Flahault (1888)
               4 Genus Richelia J. Schmidt in Ostenfeld & J. Schmidt (1901)