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 Hormoscilla Anagn. & Komárek (1988) see Genus Hormoscilla Anagnostidis and Komárek 1988