Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           [Empire Prokaryota (Dougherty 1957) Allsopp 1969] see Domain Bacteria Woese et al. 1990 stat. inval.
             [Kingdom "Bacteria" Cavalier-Smith 1998 nom. inval. - bacteria] see Kingdom Bacteria Cavalier-Smith 2002 stat. inval.
               [Subkingdom Eubacteria Cavalier-Smith 1981] see Domain Bacteria Woese et al. 1990 stat. inval.
                 [Division Gracilicutes Gibbons and Murray 1978 (Approved Lists 1980)] see Phylum Gracilicutes
                   [Class Photobacteria Gibbons and Murray 1978 (Approved Lists 1980)]
                     [Subclass Oxyphotobacteriae]
                       [Order "Cyanobacteriales" (Stanier 1973) Gibbons and Murray 1978 nom. inval.] see Order Cyanobacteriales Rippka and Cohen-Bazire 1983 nom. inval.