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 ?Genus Katagnymene Lemmermann (1899) see Genus Katagnymene Lemmermann 1899