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 Gomontiellales Strunecký & Mareš (2023) see Order Gomontiellales Strunecký and Mareš 2023
       Family Gomontiellaceae Elenkin ex Geitler (1942) see Family Gomontiellaceae Elenkin ex Geitler 1942
         1 ?Genus Borzia F.J. Cohn ex Gomont (1892) see Genus Borzia Cohn ex Gomont 1892
         2 Genus Crinalium W.B. Crow (1927) see Genus Crinalium Crow 1927
         3 ?Genus Gomontiella E.C. Teodoresco (1901) see Genus Gomontiella Teodoresco 1901
         4 Genus Hormoscilla Anagn. & Komárek (1988) see Genus Hormoscilla Anagnostidis and Komárek 1988
         5 ?Genus Katagnymene Lemmermann (1899) see Genus Katagnymene Lemmermann 1899
         6 ?Genus Komvophoron Anagn. & Komárek (1988) see Genus Komvophoron Anagnostidis and Komárek 1988
         7 Genus Starria N.J. Lang (1977) see Genus Starria Lang 1977
         8 ?Genus Yonedaella I. Umezaki (1962) see Genus Yonedaella Umezaki 1962