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 stat. inval.
       Division Cyanophycota see Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval.
         Class Cyanophyceae Hauck (1885) see Class Chroococcophyceae Hollerbach et al. 1953
           Order Nostocales Borzì (1914) see Order Nostocales corrig. Borzì 1914
             Family Scytonemataceae A.B.Frank (1886) see Family Scytonemataceae corrig. Frank 1886
               1 Genus Scytonema C.Agardh ex Bornet & Flahault (1886) see Genus Scytonema Agardh ex Bornet and Flahault 1886
               2 Genus Tolypothrix Kütz. ex Bornet & Flahault (1886) see Genus Tolypothrix Kützing ex Bornet and Flahault 1886
               3 Genus Plectonema Thuret ex Gomont (1892) see Genus Plectonema Thuret ex Gomont 1892