Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Bacteria Woese et al. 1990 [paraphyletic?] Superphylum Terrabacteria Battistuzzi et al. 2004 Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria Class "Cyanobacteria" Cavalier-Smith, 2002 [Family "Family 4.1" nom. inval.] [Genus "Nostoc" Vaucher ex Bornet and Flahault 1886 nom. inval.] see Genus Nostoc Vaucher ex Bornet & Flahault (1888) ["Nostoc commune" [ICNB]] see Nostoc commune Vaucher ex Bornet & Flahault 1888 [ICBN]