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 Stigonemataceae Borzì (1892), nom. cons. see Family Stigonemataceae corrig. (Agardh ex Bornet and Flahault 1886) Borzì 1892 nom. cons.
         1 ?Genus Cyanobotrys L. Hoffmann (1991), nom. illeg. see Genus Cyanobotrys Hoffmann 1991 nom. illeg.
         2 ?Genus Doliocatella Geitler (1933) see Genus Doliocatella Geitler 1933
         3 ?Genus Homoeoptyche H. Skuja (1944) see Genus Homoeoptyche Skuja 1944
         4 ?Genus Pulvinularia Borzì (1916) see Genus Pulvinularia Borzì 1916
         5 Genus Stigonema C.Agardh ex Bornet & Flahault (1886) see Genus Stigonema Agardh ex Bornet and Flahault 1886