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 Oscillatoriales Schaffner (1922) see Order Oscillatoriales Schaffner 1922
       Family Oscillatoriaceae Engl. (1898), nom. cons. see Family Oscillatoriaceae Engler 1898 nom. cons.
         Genus Planktothricoides Suda & M.M. Watan. (2002) see Genus Planktothricoides Suda and Watanabe 2002