[Class] Cyanobacteria "Stanier (1974)", nom. inval. - cyanoprokaryotes see Class Cyanophyceae Hauck (1885)
   Order Pleurocapsales Geitler (1925) see Order Chroococcales Ardissone (1887)
     1 Family Hydrococcaceae Kützing (1843) see Family Hydrococcaceae Kützing 1843
     2 Family Dermocarpellaceae F. Ginsburg-Ardré ex T. Christensen (1978) see Family Hydrococcaceae Kützing 1843
     3 Family Xenococcaceae Ercegović (1932) see Family Hydrococcaceae Kützing 1843
     4 Family Hyellaceae Borzì (1914) see Family Hydrococcaceae Kützing (1843)