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 Geitlerinematales Strunecký & Mareš (2023) [monotypic] see Order Geitlerinematales Strunecký and Mareš 2023 Family Geitlerinemataceae Strunecký & Mareš (2023) [monotypic] see Family Geitlerinemataceae Strunecký and Mareš 2023 1 Genus Geitlerinema (Anagn. & Komárek) Anagn. (1989) see Genus Geitlerinema (Anagnostidis and Komárek 1988) Anagnostidis 1989