Domain Bacteria Woese et al. 1990
   Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
     Class "Cyanobacteria" Cavalier-Smith, 2002
       Subsection IV
         Subgroup I see Family I
           Form genus Anabaena Bory 1822 ex Bornet & Flahault 1886 nom. cons. [ICBN]
           Form genus Anabaenopsis (Woloszynska) V.V. Mill. 1923 [ICBN]
           Form genus Aphanizomenon C. Morren ex É. Bornet & C. Flahault 1886-1888[1888] [ICBN]
           Form genus Cyanospira Florenzano et al. 1985 nom. inval. [ICBN]
           Form genus Cylindrospermopsis G. Seenayya & N. Subba Raju in T.V. Desikachary 1972 [ICBN]
           Form genus Cylindrospermum F.T. Kützing 1843 ex É. Bornet & C. Flahault 1886-1888[1888] [ICBN]
           Form genus Nodularia Mertens ex Bornet & Flahault (1888), nom. cons.
           Form genus Nostoc Vaucher ex Bornet & Flahault (1888)
           Form genus Scytonema C.Agardh ex Bornet & Flahault (1887)