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 Mastigocladaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin (1917), nom. cons.
               Genus Brachytrichia G. Zanardini ex É. Bornet & C. Flahault 1886-1888[1886]
               Genus Kyrtuthrix Ercegovic (1929)
               Genus Mastigocladus F.J. Cohn ex O. Kirchner in A. Engl. & H. Prantl (1898)