[Class] Cyanobacteria "Stanier (1974)", nom. inval. - cyanoprokaryotes see Class Cyanophyceae Hauck (1885)
   Order Nostocales Borzì (1914) see Order Nostocales corrig. Borzì 1914
     Family Scytonemataceae A.B.Frank (1886) see Family Scytonemataceae corrig. Frank 1886
       1 Genus Brasilonema Fiore, Sant'Anna, Azevedo, Komárek, Kaštovský, Sulek & Lorenzi (2007) see Genus Brasilonema Fiore et al. 2007
       2 Genus Chakia J.Komárková, E.Zapomělová & Komárek (2013), nom. inval. see Genus Chakia Komárková et al. 2013 nom. inval.
       3 Genus Kyrtuthrix Ercegović (1929) see Genus Kyrtuthrix Ercegović 1929
       4 Genus Ophiothrix Sant'Anna, Azevedo, Kaštovský & Komárek (2010), nom. illeg. see Genus Cyanophiothrix E.A. Molinari-Novoa & M.D. Guiry (2021)
       5 Genus Petalonema Berkeley ex Correns (1889) see Genus Petalonema Berkeley ex Correns 1889
       6 Genus Scytonema C.Agardh ex Bornet & Flahault (1886) see Genus Scytonema Agardh ex Bornet and Flahault 1886
       7 Section "Scytonema sect. Myochrotes" Bornet & Flahault (1886)
       8 Genus Scytonematopsis E.I. Kiseleva (1930) see Genus Scytonematopsis Kiseleva 1930