[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Prokaryota see Domain Prokaryota
     Class Cyanophyceae Hauck (1885) see Class Chroococcophyceae Hollerbach et al. 1953
       Order Hormogonales Atkinson 1905 see Order Nostocales Borzì (1914)
         Family Nostocaceae Eichler (1886) see Family Nostocaceae Eichler 1886
           Genus Anabaena Bory ex Bornet & Flahault (1886), nom. cons. see Genus Anabaena Bory ex Bornet and Flahault 1886 nom. cons.
             Anabaena variabilis F.T. Kützing ex E. Bornet and C. Flahault 1888 see Trichormus variabilis (F.T. Kützing ex E. Bornet and C. Flahault 1888) J. Komárek and K. Anagnostidis 1989