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 Cyanotrichaceae Elenkin (1947), nom. illeg. see Family Chroococcaceae Nägeli 1849 Genus Johannesbaptistia G. De Toni (1934) see Genus Johannesbaptistia De Toni 1934