Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria Subgroup Nostocacean 1 Genus Anabaena Bory 1822 ex Bornet & Flahault 1886 nom. cons. [ICBN] 2 Genus Nostoc Vaucher ex Bornet & Flahault (1888)