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 Leptobasaceae Elenkin (1917), nom. illeg. see Family Nostocaceae Eichler 1886
         1 Genus Aulosira O. Kirchner ex Bornet & Flahault (1886) see Genus Aulosira Kirchner ex Bornet and Flahault 1886
         2 Genus Calochaete T.Hauer, M.Bohunická & R.Mühlsteinová (2013) see Genus Calochaete Hauer et al. 2013
         3 ?Genus Camptylonemopsis Desikachary (1948) see Genus Camptylonemopsis Desikachary 1948
         4 ?Genus Coleospermum Kirchner ex Frank (1886) see Genus Microchaete Thuret ex Bornet and Flahault 1886 nom. cons.
         5 Genus Fortiea G. De Toni (1936) see Genus Fortiea De Toni 1936
         6 ?Genus Thiochaete H. Welsh (1961) see Genus Thiochaete Welsh 1961