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 Nostocales Borzì (1914)
             Family Rivulariaceae Kützing (1843)
               1 Genus Rivularia C.Agardh ex É. Bornet & C. Flahault (1886)
               2 Genus Gleoetrichia orth. inval. see Genus Gloeotrichia J.Agardh ex Bornet & Flahault (1886)
               3 Genus Isactis G. Thuret ex É. Bornet & C. Flahault (1886)
               4 Genus Calothrix C.Agardh ex É. Bornet & C. Flahault 1886 [ICBN]
               5 Genus Gardnerula G. De Toni (1936)