[Class] Cyanobacteria "Stanier (1974)", nom. inval. - cyanoprokaryotes see Class Cyanophyceae Hauck (1885)
   Order Nostocales Borzì (1914) see Order Nostocales corrig. Borzì 1914
     Family Nostocaceae Eichler (1886) see Family Nostocaceae Eichler 1886
       Genus Trichormus (J. Ralfs ex Bornet & Flahault) Komárek & Anagn. (1989) see Genus Trichormus (Ralfs ex Bornet and Flahault 1886) Komárek and Anagnostidis 1989