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 Chroococcales Ardissone (1887) see Order Chroococcales corrig. Ardissone 1887 Family Geminocystaceae Tuji, Yamaguchi & Niiyama (2021) see Family Geminocystaceae Tuji et al. 2021 Genus Geminobacterium Ramos, Brito & Kaštovský (2017) see Genus Geminobacterium Ramos et al. 2017