[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Prokaryota see Domain Prokaryota
     Class Cyanophyceae Schaffner (1909) see Class Cyanobacteria Cavalier-Smith, 2002
       Order Hormogonales Atkinson 1905
         Family Nostocaceae Eichler (1886)
           Genus Richelia J. Schmidt in Ostenfeld & J. Schmidt (1901)
             Richelia intracellularis J. Schmidt