Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval. - cyanobacteria see Phylum Cyanobacteriota Oren et al. 2022
   Subgroup Oscillatorian
     1 Genus Oscillatoria Vaucher ex Gomont (1892) see Genus Oscillatoria Vaucher ex Gomont 1892
     2 Genus Spirulina P.J.F. Turpin ex Gomont (1892) see Genus Spirulina Turpin ex Gomont 1892
     3 Genus Pseudoanabaena Lauterborn 1915 see Genus Pseudanabaena R. Lauterborn (1915)
     4 Genus Lyngbya C.Agardh ex Gomont (1892), nom. cons. see Genus Lyngbya C.A. Agardh ex Gomont 1892 nom. cons.
     5 Genus Phormidium Kütz. ex Gomont (1892) see Genus Phormidium Kützing ex Gomont 1892
     6 Genus Plectonema Thuret ex Gomont (1892) see Genus Plectonema Thuret ex Gomont 1892
     7 Genus Trichodesmium Ehrenberg ex Gomont 1892 nom. inval. see Genus Trichodesmium Ehrenberg ex Gomont 1892 nom. cons.