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 Prochlorothrichales Strunecký & Mareš (2023), orth. inval.] see Order Prochlorotrichales Strunecký & Mareš (2023) 1 [Family Prochlorothrichaceae orth. inval. [monotypic]] see Family Prochlorotrichaceae Burger-Wiersma, Stal & Mur (1989)