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 Gomontiellales Strunecký & Mareš (2023) see Order Gomontiellales Strunecký and Mareš 2023
       Family Chamaesiphonaceae Borzì (1878) see Family Chamaesiphonaceae Borzì 1878
         1 Genus Chamaesiphon A.Braun (1864) see Genus Chamaesiphon Braun 1864
         2 ?Genus Clastidium O. Kirchner (1880) see Genus Clastidium Kirchner 1880
         3 ?Genus Cyanophanon L. Geitler (1955) see Genus Cyanophanon Geitler 1955
         4 ?Genus Godlewskia Janczewski (1883) see Genus Chamaesiphon A.Braun (1864)
         5 ?Genus Pascherinema G.De Toni (1936) see Genus Endonema Pascher 1929
         6 ?Genus Stichosiphon L. Geitler (1931) see Genus Stichosiphon Geitler 1931