[Class] Cyanobacteria "Stanier (1974)", nom. inval. - cyanoprokaryotes see Class Cyanophyceae Hauck (1885)
   Order Nostocales Borzì (1914) see Order Nostocales corrig. Borzì 1914
     Family Aphanizomenonaceae Elenkin (1938), orth. inval. see Family Aphanizomenaceae corrig. Elenkin 1938
       Genus Cuspidothrix Rajaniemi, Komárek, Willame, Hrouzek, Kaštovská, Hoffmann & Sivonen (2005) see Genus Cuspidothrix Rajaniemi et al. 2005