life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokarya see Domain Bacteria Woese et al. 1990
     Kingdom Bacteria (Cohn 1870) Cavalier-Smith 1983 - bacteria see Kingdom Bacteria Cavalier-Smith 2002
       Subkingdom Eubacteria Cavalier-Smith 1981 see Domain Bacteria Woese et al. 1990
         Division Gracilicutes Gibbons and Murray 1978 (Approved Lists 1980) see Phylum Gracilicutes
           Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
             Class Hormogoneae Thuret (1875) - filamentous cyanobacteria see Class Hormogoneae Cavalier-Smith 2002
               Order Stigonematales Geitler (1925) see Order Stigonematales (ex Geitler 1925) Cavalier-Smith 2002 nom. rej.
                 Genus Fischerella (E. Bornet & C. Flahault) M. Gomont (1895)