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
             1 Family Microchaetaceae Lemmermann (1907) see Family Rivulariaceae Frank (1886)
             2 Family Rivulariaceae Frank (1886) see Family Rivulariaceae Frank 1886
             3 Family Nostocaceae Eichler (1886) see Family Nostocaceae Eichler 1886
             4 Family Oscillatoriaceae Engl. (1898), nom. cons. see Family Oscillatoriaceae Engler 1898 nom. cons.
             5 Family Gomontiellaceae Elenkin ex Geitler (1942) see Family Gomontiellaceae Elenkin ex Geitler 1942
             6 Family Scytonemataceae A.B.Frank (1886) see Family Scytonemataceae corrig. Frank 1886