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 Subclass Nostocophycideae Order Nostocalesᵀ Borzì (1914) Family Nostocaceaeᵀ Eichler (1886) 1 Genus Cuspidothrix Rajaniemi et al. (2005) 2 Genus "Cyanospira" Florenzano et al. 1985 nom. inval. [ICBN] 3 Subfamily Anabaenoideae (E. Bornet & C. Flahault) O. Kirchner (1900) 4 Subfamily Nostocoideaeᵀ