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.
             Family Stigonemataceae Borzì (1886), nom. cons.
               1 Genus Matteia A. Borzì (1907)
               2 Genus Stigonema C.Agardh ex Bornet & Flahault (1887)
               3 Genus Fischerella (E. Bornet & C. Flahault) M. Gomont (1895)
               4 Genus Geitleria Friedmann 1955 [ICBN]