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 Gomphosphaeriaceae Elenkin (1933) [monotypic] see Family Gomphosphaeriaceae Elenkin 1933
         Genus Gomphosphaeria Kütz. (1836) see Genus Gomphosphaeria Kützing 1836