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
       Division Cyanophycota see Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002
         Class Cyanophyceae Schaffner (1909) see Class Cyanobacteria Cavalier-Smith, 2002
           Order Stigonematales Geitler (1925) see Order Stigonematales (ex Geitler 1925) Cavalier-Smith 2002 nom. rej.
             1 Family Stigonemataceae Borzì (1886), nom. cons.
             2 Family Capsosiraceae (A. Borzì) L. Geitler (1925) see Family Stigonemataceae Borzì (1886), nom. cons.
             3 Family Nostochopsidaceae see Family Nostochopsaceae Geitler (1925)
             4 Family Borzinemataceae L. Geitler (1942)
             5 Family Mastigocladaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin (1917), nom. cons.
             6 Family Mastigocladopsidaceae see Family Nostochopsaceae Geitler (1925)