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 Scytonemataceae F.T. Kützing ex O. Kirchner in A. Engl. & H. Prantl (1898) Genus Scytonemaᵀ C.Agardh ex Bornet & Flahault (1887) Scytonema crispum (C.A. Agardh) ex Bornet 1889 Scytonema figuratum C.A. Agardh ex Bornet and Flahault 1886-1888[1887] Scytonema hofmanni [ICBN]