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)
             Family Stigonemataceae Borzì (1892), nom. cons. see Family Stigonemataceae corrig. (Agardh ex Bornet and Flahault 1886) Borzì 1892 nom. cons.
               1 Genus Matteia A. Borzì (1907) see Genus Matteia Borzì 1907
               2 Genus Stigonema C.Agardh ex Bornet & Flahault (1886) see Genus Stigonema Agardh ex Bornet and Flahault 1886
               3 Genus Fischerella (Bornet & Flahault) Gomont (1895) see Genus Fischerella (Bornet and Flahault 1886) Gomont 1895
               4 Genus Geitleria Friedmann (1955) see Genus Geitleria Friedmann 1955