living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryotae see Superkingdom Prokarya
     Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990 stat. inval.
       Division Cyanophycota see Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval.
         Class Cyanophyceae Hauck (1885) see Class Chroococcophyceae Hollerbach et al. 1953
           Order Stigonematales Geitler (1925) see Order Nostocales Borzì (1914)
             1 Family Stigonemataceae Borzì (1892), nom. cons. see Family Stigonemataceae corrig. (Agardh ex Bornet and Flahault 1886) Borzì 1892 nom. cons.
             2 Family Capsosiraceae L. Geitler (1925) see Family Capsosiraceae Geitler 1925
             3 Family Nostochopsidaceae see Family Nostochopsaceae Geitler (1925)
             4 Family Borzinemataceae L. Geitler (1942) see Family Borzinemataceae Geitler 1942
             5 Family Mastigocladaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin (1917), nom. cons.
             6 Family Mastigocladopsidaceae see Family Nostochopsaceae Geitler (1925)