Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval. - cyanobacteria see Phylum Cyanobacteriota Oren et al. 2022 Genus Cylindrospermum Kütz. ex Bornet & Flahault (1886), incertae sedis see Genus Cylindrospermum Kützing ex Bornet and Flahault 1886