Phylum Cyanobacteria Garcia-Pichel et al. (2020) see Phylum Cyanobacteriota Oren et al. 2022
   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
         01 ?Genus Adrianema De Toni (1936), nom. illeg. see Genus Lithonema Ercegović 1929
         02 Genus Aetokthonos S.B.Wilde & J.R.Johans. (2014) see Genus Aetokthonos Wilde and Johansen 2014
         03 ?Genus Brachytrichia G. Zanardini ex Bornet & Flahault (1886) see Genus Brachytrichia Zanardini ex Bornet and Flahault 1886
         04 Genus Brasilonema Fiore, Sant'Anna, Azevedo, Komárek, Kaštovský, Sulek & Lorenzi (2007) see Genus Brasilonema Fiore et al. 2007
         05 ?Genus Chakia J.Komárková, E.Zapomělová & Komárek (2013), nom. inval. see Genus Chakia Komárková et al. 2013 nom. inval.
         06 ?Genus Colteronema Copel. (1936) see Genus Colteronema Copeland 1936
         07 ?Genus Croatella Ercegović (1925) see Genus Croatella Ercegović 1925
         08 Genus Cronbergia Komárek, Zapomělová & Hindák (2010) see Genus Cronbergia Komárek et al. 2010
         09 Genus Ewamiania McGregor & Sendall (2017) see Genus Ewamiania McGregor and Sendall 2017
         10 ?Genus Herpyzonema Weber-van Bosse (1913) see Genus Herpyzonema Weber-van Bosse 1913
         11 Genus Iphinoe V. Lamprinou & A. Pantazidou (2011), nom. inval. see Genus Iphinoe Lamprinou and Pantazidou 2011, nom. inval.
         12 Genus Iningainema McGregor & Sendall (2017) see Genus Iningainema McGregor and Sendall 2017
         13 ?Genus Iyengariella Desikachary (1953) see Genus Iyengariella Desikachary 1953
         14 ?Genus Loriellopsis Hernández-Mariné & Canals (2011), nom. inval. see Genus Loriellopsis Hernández-Mariné and Canals 2011 nom. inval.
         15 Genus Mastigocladopsis M.O.P. Iyengar & Desikachary (1946) see Genus Mastigocladopsis Iyengar and Desikachary 1946
         16 ?Genus Ophiothrix Sant'Anna, Azevedo, Kaštovský & Komárek (2010), nom. illeg. see Genus Cyanophiothrix E.A. Molinari-Novoa & M.D. Guiry (2021)
         17 ?Genus Parenchymorpha C.K. Tseng & M. Hua (1984) see Genus Parenchymorpha Tseng and Hua 1984
         18 Genus Petalonema Berkeley ex Correns (1889) see Genus Petalonema Berkeley ex Correns 1889
         19 Genus Scytonema C.Agardh ex Bornet & Flahault (1886) see Genus Scytonema Agardh ex Bornet and Flahault 1886
         20 ?Genus Scytonematopsis E.I. Kiseleva (1930) see Genus Scytonematopsis Kiseleva 1930
         21 Genus Spelaeonaias Lamprinou, Christodoulou, Hernández-Mariné & Economou-Amilli (2016) see Genus Spelaeonaias Lamprinou et al. 2016
         22 ?Genus Symphyonema C.C. Jao (1944) see Genus Symphyonema Jao 1944
         23 ?Genus Symphyonemopsis G. Tiwari & A. Mitra (1969) see Genus Symphyonemopsis Tiwari and Mitra 1969
         24 ?Genus Voukiella Ercegović (1925) see Genus Voukiella Ercegović 1925