[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 Macrospermum Komárek (2008) see Genus Macrospermum Komárek 2008