Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           [Domain "Bacteria" Woese et al. 1990 stat. inval. [paraphyletic?]] see Domain Bacteria Woese et al. 2024
             [Phylum Cyanobacteria "Stanier (1974)"] see Phylum Cyanobacteriota Oren et al. 2022
               [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
                   1.0 [Family Scopulonemataceae] 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)
                   4.09 [Family Pascherinemataceae] see Family Hyellaceae Borzì (1914)
                   x ?[Family Cyanophanaceae] see Family Chamaesiphonaceae Borzì (1878)
                   x [Family Dermocarpaceae Geitler (1925)] see Family Dermocarpaceae Geitler 1925
                   x [Family Siphononemataceae] see Subfamily Siphononematoideae